|| List of recent Lasers-related patents
|Method of laser separation of the epitaxial film or of the epitaxial film layer from the growth substrate of the epitaxial semiconductor structure (variations)|
The present invention proposes variations of the laser separation method allowing separating homoepitaxial films from the substrates made from the same crystalline material as the epitaxial film this new method of laser separation is based on using the selective doping of the substrate and epitaxial film with fine donor and acceptor impurities. In selective doping, concentration of free carries in the epitaxial film and substrate may essentially differ and this can lead to strong difference between the light absorption factors in the infrared region near the residual beams region where free carriers and phonon-plasmon interaction of the optical phonons with free carriers make an essential contribution to infrared absorption of the optical phonons.
|Light source module using lasers as light source|
A light source module includes a double refraction prism, an optical plate, a first laser source, a second laser source, and a third laser source. A first laser beam emitted from the first laser source and a second laser beam emitted from the second laser source are mixed by the double refraction prism and these are mixed together with a third laser beam emitted from the third laser source by the optical plate..
|Compact, coherent, high brightness light sources for the mid and far ir|
Compact high brightness light sources for the mid and far ir spectral region, and exemplary applications are disclosed based on passively mode locked tm fiber comb lasers. In at least one embodiment the coherence of the comb sources is increased in a system utilizing an amplified single-frequency laser to pump the tm fiber comb laser.
|Quantum computer and quantum computing using ising model|
For each pair of a plurality of slave lasers b for which injection synchronization is performed by a master laser m, by controlling the intensity of light exchanged between two slave lasers b and an optical path length between the two slave lasers b using a slave-to-laser intensity control unit ia and an inter-slave laser optical path length control unit ip, the magnitude and the sign of pseudo ising interaction jij between the two slave lasers b are implemented. After the plurality of slave lasers b arrive at a steady state, by measuring relative values of the oscillation phases of the plurality of slave lasers b with respect to the oscillation phase of the master laser m by using an oscillation phase measuring unit pm, pseudo ising spins σi of the plurality of slave lasers b are measured..
|Toy laser gun and laser target system|
The present invention relates to a toy gun capable of transmitting a laser beam and/or an infrared (“ir”) beam of light for use in a game. The toy gun also has a detector for detecting a laser and ir signal.
|Highly reflective, hardened silica titania article and method of making|
The present disclosure is directed to improved silica-titania glass articles intended for use in euv or other high energy reflective optic systems, and to a process for producing such improved silica-titania articles. The improved silica-titania glass articles provide a more stable surface for the coatings that are used in the making of reflective optical elements for euv applications.
|Lasers with ingaasp quantum wells and gaasp barrier layers|
A laser can include an active region having: one or more quantum wells having ingaasp; and two or more quantum well barriers having gaasp bounding the one or more quantum wells, wherein the active region is devoid of al. The laser emits light having about 850 nm.
|Optical semiconductor device|
An optical semiconductor device includes: semiconductor lasers; a wave coupling section multiplexing light output by the semiconductor lasers; first optical waveguides respectively optically connecting respective semiconductor lasers to the wave coupling section; a phase regulator regulating phase of reflected light that is reflected at a reflecting point located in the optical semiconductor device and that returns to the semiconductor lasers; a second optical waveguide optically connecting the wave coupling section to the phase regulator; an optical amplifying section amplifying output light of the phase regulator; and a third optical waveguide optically connecting an output of the phase regulator to the optical amplifying section. The phase regulator adjusts the phase of reflected light that returns to the semiconductor lasers to decrease line width of the light output by the semiconductor lasers..
|Subchannel security at the optical layer|
The present invention includes various novel systems and methods for dynamically modifying wdm transmission and receive steps (individually or in combination), including encoding client signals, mapping them to subchannels within or across itu channels, modulating them onto subcarrier frequencies, and multiplexing them together for optical transmission. By dynamically modifying one or more of these processing steps over time (as well as encrypting underlying client signals), additional security is provided at the physical (optical) layer of an optical network, thereby greatly enhancing overall network security.
|Two-dimensional wavelength-beam-combining of lasers using first-order grating stack|
A method and apparatus for two-dimensional wavelength beam combining of laser sources. In one example, an external cavity multi-wavelength laser includes an array of laser emitters each producing an optical beam having a specified wavelength, a grating stack comprising a plurality of first-order diffraction gratings arranged linearly in a first dimension, and a dispersive element.
|Multi-mode fiber amplifier|
A laser utilizes a cavity design which allows the stable generation of high peak power pulses from mode-locked multi-mode fiber lasers, greatly extending the peak power limits of conventional mode-locked single-mode fiber lasers. Mode-locking may be induced by insertion of a saturable absorber into the cavity and by inserting one or more mode-filters to ensure the oscillation of the fundamental mode in the multi-mode fiber.
|Exposing device and image forming apparatus|
Provided is an exposing device capable of enhancing usage efficiency of light and preventing degradation of imaging property due to a misalignment with a photosensitive drum. The exposing device includes: a laser array including multiple lasers arranged in a predetermined direction; and an optical system guiding light emitted from the each of the multiple lasers to a photosensitive member and focusing the light on the photosensitive member, in which the optical system includes multiple phase modulation elements to decrease a phase lag added in proportion to distance from a center axis that is defined by a principal light beam emitted from the each of the multiple lasers..
|Fixture planarity evaluation method|
Methods for determining the planarity of two components of a semiconductor processing tool, such as a 3d wafer bonder are disclosed. The two components may be fixtures, chucks, or platens of the tool.
|Touchscreen displays incorporating dynamic transmitters|
Systems and methods for implementing touchscreen displays that utilize a transmitter system to dynamically scan at least one light beam across a surface of interest such that substantially every point in a region above the surface of interest is dynamically scanned by a light beam from two directions, a receiver system to receive and detect the at least one dynamically scanned light beams, and a processor configured to determine locations of contact are provided. The systems and methods may utilize a transmitter system that includes dynamic transmitters, which may be in the form mems micromirrors used in conjunction with infrared semiconductor lasers..
|Focused near-infrared lasers for non-invasive varicose veins and other thermal coagulation or occlusion procedures|
Focused infrared light may be used in a non-invasive varicose vein treatment procedure with infrared light from a plurality of laser diodes that are combined in a multiplexer and coupled to a multi-mode fiber coupled to another fiber or fiber bundle that delivers the light to a lens/mirror assembly for application in the non-invasive procedures. The wavelength of light may be selected near 980 nm, 1210 nm, or 1720 nm to achieve a desired penetration depth and/or for absorption in a particular tissue type or water.
|Focused near-infrared lasers for non-invasive vasectomy and other thermal coagulation or occlusion procedures|
Focused infrared light at wavelengths selected to target tissue below the skin may be used in a non-invasive procedure for vasectomies, varicose veins, hemorrhoids, or fungal nail infections. Infrared light from various sources selected for a particular application may be focused so that the cone of light has lower intensity on the skin/outer tissue and higher intensity at a desired depth to cause thermal coagulation or occlusion of the target tissue beneath the skin.
|Short pulse fiber laser for ltps crystallization|
Laser pulses from pulsed fiber lasers are directed to an amorphous silicon layer to produce a polysilicon layer comprising a disordered arrangement of crystalline regions by repeated melting and recrystallization. Laser pulse durations of about 0.5 to 5 ns at wavelength range between about 500 nm and 1000 nm, at repetition rates of 10 khz to 10 mhz can be used.
|Optical bench apparatus having integrated monitor photodetectors and method for monitoring optical power using same|
Optical bench structure provides a platform for integrating optical transmitters, particularly vertical-cavity surface-emitting lasers (vcsels), with monitor photodetectors. A substrate with photodetectors on the front side is aligned with flip-chip bonding bumps so the emission of the transmitters is aligned with the monitor photodetectors and passes through the monitor photodetectors with a portion of the transmitted light absorbed by the monitor photodetectors.
|Spatially stable high brightness fiber|
Optical fibers that provide stable output beam sizes have core refractive indices that decrease non-monotonically from a core center to a core/cladding interface. A maximum refractive index of the core is situated at a radius of between about ½ and ¾ of the core radius so that a core center has a depressed refractive index.
|Pulsed bias current for gain switched semiconductor lasers for amplified spontaneous emission reduction|
Gain switched laser diode pulses are used as seed pulses for optical pulse generation. Ase is reduced by applying a prebias to the laser diodes at an amplitude less than that associated with a laser diode threshold.
|Enhanced optical gain and lasing in indirect gap semiconductor thin films and nanostructures|
Structures and methodologies to obtain lasing in indirect gap semiconductors such as ge and si are provided and involves excitonic transitions in the active layer comprising of at least one indirect gap layer. Excitonic density is increased at a given injection current level by increasing their binding energy by the use of quantum wells, wires, and dots with and without strain.
|Apparatus for condensing light from multiple sources using bragg gratings|
There is provided a colour sequential illumination device comprising in series: first and second light sources; a condenser lens; and a grating device. The grating device comprises at least one bragg grating.
|All fiber low dynamic pointing high power lma fiber amplifier|
High power fiber lasers include large or very large mode area active fibers. Mode preserving pump combiners are situated to counter-pump the active fiber using one or more pump sources.
|Color-based stereoscopic projection system and method|
A stereoscopic projection system and method of generating light that include two or three infrared lasers, two optical parametric oscillators, and six or seven second harmonic generators. Six colors of visible light are produced.
|Short-wave infrared super-continuum lasers for detecting counterfeit or illicit drugs and pharmaceutical process control|
A system and method for using near-infrared or short-wave infrared (swir) light sources for identification of counterfeit drugs may perform spectroscopy using a super-continuum laser to provide detection in a non-contact and non-destructive manner at stand-off or remote distances with minimal sample preparation. Also, near-infrared or swir light may penetrate through plastic containers and packaging, permitting on-line inspection and rapid scanning.
|Long-distance polarization and phase-sensitive optical time-domain reflectometry based on random laser amplification|
A long-distance polarization and phase-sensitive reflectometry based on random laser amplification for extending a sensing distance includes a long-distance polarization and phase-sensitive reflectometry of a distributed raman amplification based on optical fiber random lasers generated by unilateral pumps, a long-distance polarization and phase-sensitive reflectometry of a distributed raman amplification based on optical fiber random lasers generated by bilateral pumps, and a long-distance polarization and phase-sensitive reflectometry of a raman amplification based on a combination of optical fiber random lasers generated by unilateral pumps and a common raman pump source, which are applied in optical fiber perturbation sensing and have a capability of greatly improving a working distance of a sensing system and a high practicability.. .
|Low etendue illumination|
An optical system and method that utilize multiple low-etendue lasers to illuminate multiple spots one or more spatial light modulators. Stereoscopic systems may be formed by using different wavelengths or different polarizations for each spot.
|Laser machining system having a machining laser beam that is adjustable in terms of its brilliance|
Laser machining system (60) comprises a high-power laser (61) for generating a high-power pump laser beam (hp-mm), control signal laser (62) for generating a control signal laser beam (ss), an optical fibre (64) leading from the two lasers to a laser machining head (63). The optical fibre has an srs amplifier fibre (65) with an inner fibre core (65a) of higher brilliance and with an outer fibre core (65b) of lower brilliance surrounding the inner fibre core.
|Beating signal monitoring module, terahertz wave generation device and optical signal monitoring device including the beating signal monitoring module|
The inventive concept relates to a beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module. The beating signal monitoring module includes a nonlinear unit generating an optical signal including a fwm light in response to a beating signal generated from a first light and a second light; a filter unit separating the fwm light from the optical signal and outputting the separated fwm light; and a monitoring unit monitoring the beating signal using the separated fwm light.
|Methods and apparatus pertaining to picosecond pulsed fiber based lasers|
A pulsed fiber laser apparatus for outputting picosecond laser pulses can comprise a fiber delivered pulsed seed laser for providing picosecond optical seed pulses, and at least one optical fiber amplifier in optical communication with the fiber delivered pulsed seed laser. The optical fiber amplifier can comprise a gain optical fiber that receives and optically amplifies picosecond optical pulses by operating in a nonlinear regime wherein the picosecond optical pulses can be spectrally broadened by a factor of at least 8 during amplification thereof.
|Method and apparatus for enhanced pathogen mortality in ventilation systems using solid state means of generation of uvc|
A novel method and apparatus is presented wherein an output of infra-red solid state laser or multiple of such lasers is quadrupled in frequency to obtain a laser output that emits energy in ultra violet c spectrum, and wherein this energy is then provided within an air duct as is normal in hvac systems so as it kill pathogens that are airborne and being carried through the conduit. Further such a method reduces production of ozone, detrimental to human health and produced in other means of generating uvc and provides ease of control of such energy so as to maintain the required energy at a steady level for prolonged period of time..
|Thermally shielded multi-channel transmitter optical subassembly and optical transceiver module including same|
A thermally shielded multi-channel transmitter optical subassembly (tosa) may be used in a multi-channel optical transceiver. The multi-channel tosa generally includes an array of lasers optically coupled to an arrayed waveguide grating (awg) to combine multiple optical signals at different channel wavelengths.
|Thermally isolated multi-channel transmitter optical subassembly and optical transceiver module including same|
A thermally isolated multi-channel transmitter optical subassembly (tosa) may be used in a multi-channel optical transceiver. The multi-channel tosa generally includes an array of lasers optically coupled to an arrayed waveguide grating (awg) to combine multiple optical signals at different channel wavelengths.
|Temperature controlled multi-channel transmitter optical subassembly and optical transceiver module including same|
A temperature controlled multi-channel transmitter optical subassembly (tosa) may be used in a multi-channel optical transceiver. The multi-channel tosa generally includes an array of lasers optically coupled to an arrayed waveguide grating (awg) to combine multiple optical signals at different channel wavelengths.
|Despeckling of continuous-wave lasers|
An apparatus and method that reduces speckle from continuous-wave lasers by using stimulated raman scattering in an optical fiber. The fiber core diameter and length are selected to achieve a desired output color and level of despeckling.
|Method of manufacturing frequency tunable terahertz transceiver|
A method of manufacturing a frequency tunable terahertz transceiver including two separate distributed feedback lasers manufactured in one substrate, includes forming a lower clad layer on the substrate, forming an active layer on the lower clad layer, forming an upper clad layer on the active layer. And interposing first and second diffraction grating layers between the upper clad layers.
|Integrated dual swept source for oct medical imaging|
An optical coherence analysis system comprising: a first swept source that generates a first optical signal that is tuned over a first spectral scan band, a second swept source that generates a second optical signal that is tuned over a second spectral scan band, a combiner for combining the first optical signal and the second optical signal for form a combined optical signal, an interferometer for dividing the combined optical signal between a reference arm leading to a reference reflector and a sample arm leading to a sample, and a detector system for detecting an interference signal generated from the combined optical signal from the reference arm and from the sample arm. In embodiments, the swept sources are tunable lasers that have shared laser cavities..
|Process to optically align optical systems on a weapon|
A process to optically align optical systems on a weapon is disclosed. Several different embodiments of the system and method are disclosed.
|Thermal treatment methods and apparatus|
Embodiments described herein provide methods and apparatus for thermally treating a substrate. A first radiant energy source that delivers a first radiation at a first fluence and a second radiant energy source that delivers a second radiation at a second fluence are disposed to direct energy toward a substrate support positioned to receive the first radiation at a first location and the second radiation at a second location, wherein the first fluence is 10 to 100 times the second fluence and the first radiation cannot reach the second location.
|Ultra-broad bandwidth laser glasses for short-pulse and high peak power lasers|
The invention relates to glasses for use in solid laser applications, particularly short-pulsed, high peak power laser applications. In particular, the invention relates to a method for broadening the emission bandwidth of rare earth ions used as lasing ions in solid laser glass mediums, especially phosphate-based glass compositions, using nd and yb as co-dopants.
|Integrated light source independent linewidth reduction of lasers using electro-optical feedback techniques|
An integrated optical linewidth reduction system includes a phase modulator adapted to modulate the phase of an incoming optical signal in response to a feedback control signal defined by a first electrical signal. The phase modulator is further adapted to generate a first optical signal travelling through a first optical path.
|High-yield high-precision distributed feedback laser based on an array|
A distributed-feedback laser with wavelength accuracy and spectral purity. An array of lasers with highly reflecting/anti reflecting facets is fabricated on a single chip with controlled variations, in for example laser gratings.
|Novel thermal processing apparatus|
The present invention generally relates to an optical system that is able to reliably deliver a uniform amount of energy across an anneal region contained on a surface of a substrate. The optical system is adapted to deliver, or project, a uniform amount of energy having a desired two-dimensional shape on a desired region on the surface of the substrate.
|Method of fabricating flexible display device|
A method of fabricating a flexible display device is to prevent damage due to a defective detachment of an auxiliary substrate by carrying out the detachment in a manner of irradiating lasers onto a sacrifice layer interposed between a flexible substrate and an auxiliary substrate and thereafter taking away a vacuum by injecting air into the interface between the flexible substrate and the auxiliary substrate. The fabricating method includes providing an auxiliary substrate, forming a sacrifice layer on the auxiliary substrate, forming a flexible substrate on the auxiliary substrate with the sacrifice layer formed thereon, forming a display panel on the flexible substrate, removing the sacrifice layer interposed between the flexible substrate and the auxiliary substrate by way of a laser irradiation, injecting air between the flexible substrate and the auxiliary substrate removed the sacrifice layer therebetween, and detaching the auxiliary substrate from the flexible substrate..
|Method and apparatus for generation of coherent frequency combs|
Embodiments of the invention provide apparatuses and methods for phase correlated seeding of parametric mixer and for generating coherent frequency combs. The parametric mixer may use two phase-correlated optical waves with different carrier frequencies to generate new optical waves centered at frequencies differing from the input waves, while retaining the input wave coherent properties.
|Scalable diode laser source for optical pumping|
The system and method for modifying the output beam parameters of a plurality of laser diode array sources comprises scalable pump sources for use with diode pumped alkali lasers. The present invention optimizes a diode laser pump source by spectrally-narrowing stacks of diode laser array bars using a single external cavity outfitted with a proprietary step-mirror and cylindrical optical elements.
|Projection systems with despeckled laser light|
An apparatus and method for the projection of stereoscopic images that includes a pulsed laser that generates green light and an optical fiber that generates stimulated raman scattered light. The stimulated raman scattering light is divided into green light and red light and the colors are used to form stereoscopic images.
|Vehicle back-up assist system|
A vehicle back-up assist system that can be set up by the vehicle driver or a spotter and provides a unique visual aid to assist with safely and efficient unloading, loading, or parking a vehicle without requiring assistance from another person. The back-up assist system includes a pair of differently colored portable markers.
|Organic semiconductor compositions|
The present invention relates to organic semiconductor compositions and organic semiconductor layers and devices comprising such organic semiconductor compositions. The invention is also concerned with methods of preparing such organic semiconductor compositions and layers and uses thereof.
|Cancer tissue detection and diagnosis using laser fluorescence|
A laser diagnostic system includes multiple lasers providing incident light on a sample, the light modulated and cooperatively phased to stimulate red emissions from the sample; and a detector coupled to a spectrum analyzer, to detect both the incident light and the red emissions from the sample, and to provide a signal indicating detection of a pathology in the sample.. .
|Ophthalmic multiple wavelength laser illuminator with a graphical user interface|
An ophthalmic laser illuminator 10 includes multiple laser devices 12-16. There are at least three different wavelengths of light emitted by the multiple laser devices 12-16 and each wavelength of light emitted by each laser device is outside of wavelengths blocked by a safety filter used for surgical treatment lasers 52.
|Pharmaceutical composition for treating scars on the skin, and method for treating scars on the skin using same|
The present invention relates to a pharmaceutical composition for treating scars on the skin, comprising a mixture of botulinum toxin and air. The mixture of botulinum toxin and air according to the present invention, when injected in the dermis, may temporarily removed the elasticity of the dermis and flatten out the depressed part of the scar, and thus enables elaborate intradermic resection and increases the therapeutic effects of lasers for treating pulsed dye laser or of fractional lasers.
|Continuous-wave organic dye lasers and methods|
An organic dye laser produces a continuous-wave (cw) output without any moving parts (e.g., without using flowing dye streams or spinning discs of solid-state dye media to prevent photobleaching) and with a pump beam that is stationary with respect to the organic dye medium. The laser's resonant cavity, organic dye medium, and pump beam are configured to excite a lasing transition over a time scale longer than the associated decay lifetimes in the organic dye medium without photobleaching the organic dye medium.
|Fiber amplifiers and fiber lasers with reduced out-of-band gain|
A method of operating a fiber amplifier characterized by a spectral gain curve includes providing an input signal at a signal wavelength. The signal wavelength lies within an in-band portion of the spectral gain curve extending from a first in-band wavelength to a second in-band wavelength, the in-band portion being characterized by a first amplitude range.
|Apparatus and method for cutting with a laser array|
An apparatus and a method are provided for cutting, cutting-out and perforating web or sheet substrates. The apparatus has a laser cutting device disposed above or below a transport plane for processing a substrate.
|Light emitting diode illumination system|
The present invention provides a light engine having four light sources. A combination of collimators, bandpass filters, dichroic mirrors, and other elements is operative to direct light from the light sources onto a main optical axis from where it may be focused into a light guide for transport to an instrument or device.
|Solderless mounting for semiconductor lasers|
A first contact surface of a semiconductor laser chip can be formed to a first target surface roughness and a second contact surface of a carrier mounting can be formed to a second target surface roughness. A first bond preparation layer comprising a first metal can optionally be applied to the formed first contact surface, and a second bond preparation layer comprising a second metal can optionally be applied to the formed second contact surface.
|Apparatus for focus beam analysis of high power lasers|
An in-line laser beam waist analyzer system includes an optical prism that picks off a portion of a second surface reflection from either a laser processing focus lens or a protective debris shield for the processing lens and directs that focused light to a pixelated detector. This provides real time monitoring of the focused laser beam while it is processing material by welding, cutting, drilling, scribing or marking, without disrupting the process..
|Systems and methods for imaging using a random laser|
Systems and methods are provided for imaging using complex lasers. In general, a complex laser may be used as an electromagnetic source for an imaging application.
|Laser guidance system for interventions|
An instrument guide apparatus for use with a surgical or other guided intervention of a patient utilizing a guided instrument is disclosed. The instrument guide apparatus includes at least two line lasers mounted above the patient and generating intersecting planar laser lines along an instrument axis of entry in three-dimensional space above the patient.
|Highly compact multi-optical-junction optical flowcell and flexibly deployable optical sensing assemblies and systems for in-situ real-time spectroscopic measurements|
A highly compact multi-optical-junction optical flowcell includes a housing having an internal channel, to which a plurality of source optical signal modules can be coupled, e.g., in a peripheral manner. The source optical signal modules can include a set of leds and/or semiconductor lasers, and can be coupled to the flowcell by way of a standard optical coupling such as an sma-type optical connector.
|System and method for forming an image on a substrate|
A scanning laser having a wavelength compatible with a coating binder so as to cure it as the laser scans and irradiates the coating on a moving web. A system and method for curing flakes by providing a scanning laser which scans across a moving coated substrate in a magnetic field allows images to be formed as magnetically aligned flakes are cured into a fixed position.
|Compact optical package made with planar structures|
A device structure and system for connecting optical waveguides to optical transmit and receive components is described. The structure is made of two parts.
|Phase locked loop|
An optical phase-locked loop (opll) comprising a phase-frequency detector; first and second lasers; a local oscillator; a detector and a low pass filter connected in a circuit comprising a feedback path. The opll can also include a pre-scaler, a second local oscillator and a mixer..
|Molecular gas laser|
The closed cycle solid state optically pumped gas hybrid (chemical recovery) system utilizes a laser diode excited solid state, fiber or bulk, laser as a pump for a molecular gas, or gas mix, medium. The existence of efficient high power laser diode excited solid state fiber or bulk lasers, output spectrally matched to suitable principle and excited level 1st and 2nd overtones of relevant gases, is the enabling system technology.
|Illumination devices using array of reflectors|
Embodiments of the present invention provide apparatuses and systems for providing illumination for projectors. Two or more sets of reflectors are used to combine light beams emitted by two or more two-dimensional arrays of light sources to provide a combined light beam with high brightness toward a pupil of a projection system.
|Laser swept source with controlled mode locking for oct medical imaging|
An optical coherence analysis system uses a laser swept source that is constrained to operate in a mode locked condition. This is accomplished by synchronously changing the laser cavity's gain and/or phase based on the round trip travel time of light in the cavity.
|Laser cutting machine and machine-readable medium|
A device for laser cutting materials, including metals. The device provides for independent simultaneous operation of two or more laser heads at one machine.
|Dipyrin based materials for photovoltaics, compounds capable of undergoing symmetry breaking intramolecular charge transfer in a polarizing medium and organic photovoltaic devices comprising the same|
The present disclosure generally relates to organic photosensitive optoelectronic devices comprising at least one boron dipyrrin compound. In addition, the present disclosure relates to methods of making organic photosensitive optoelectronic devices comprising at least one boron dipyrrin compound.
|Positive and negative obstacle avoidance system and method for a mobile robot|
Embodiments of the present invention provide methods and systems for ensuring that mobile robots are able to detect and avoid positive obstacles in a physical environment that are typically hard to detect because the obstacles do not exist in the same plane or planes as the mobile robot's horizontally-oriented obstacle detecting lasers. Embodiments of the present invention also help to ensure that mobile robots are able to detect and avoid driving into negative obstacles, such as gaps or holes in the floor, or a flight of stairs.
|Wavelength-stabilized diode laser|
A hybrid external cavity laser (hecl) system comprises a diode laser, collection and collimation optics, and a volume bragg grating, emits radiation at a single wavelength with a short-term wavelength stability in the order of at least one part in a billion the wavelength stability is achieved by use of a thermal management system, comprising inner and outer housings, each containing a temperature sensor, and electronic circuitry that monitors the temperatures and controls both the laser diode current and a thermoelectric cooler based on temperatures determined from said temperature sensors. The laser system is packaged in a compact enclosure that minimizes waste heat, facilitating use in applications that have heretofore employed stable, single-frequency lasers, including he—ne lasers..