|| List of recent Diode-related patents
| Skin tanning and light therapy incorporating light emitting diodes|
The invention relates to a skin tanning chamber, the improvement comprising at least one light emitting diode emitting a uva light, such as a uva led that emits essentially only uva. Additionally, multiple leds of varying types with various characteristic wavelengths are controlled independently to produce an arbitrary light pattern in an arbitrary sequence over time.
| Apparatus and methods for controlling and applying flash lamp radiation|
Apparatus and methods are disclosed for treating allergic rhinitis (seasonal and perennial hay fever), by application of flash lamp radiation. The nasal cavity can be illuminated in a safe and effective manner, with non-coherent light from a flash-lamp or other suitable source.
| Method of forming a gated diode structure for eliminating rie damage from cap removal|
A method of fabricating a semiconductor structure provided with a plurality of gated-diodes having a silicided anode (p-doped region) and cathode (n-doped region) and a high-k gate stack made of non-silicided gate material, the gated-diodes being adjacent to fets, each of which having a silicided source, a silicided drain and a silicided hik gate stack. The semiconductor structure eliminates a cap removal rie in a gate first high-k metal gate flow from the region of the gated-diode.
| Avalanche photodiodes and methods of fabricating the same|
Provided are an avalanche photodiode and a method of fabricating the same. The method of fabricating the avalanche photodiode includes sequentially forming a compound semiconductor absorption layer, a compound semiconductor grading layer, a charge sheet layer, a compound semiconductor amplification layer, a selective wet etch layer, and a p-type conductive layer on an n-type substrate through a metal organic chemical vapor deposition process..
| Cmos image sensor white pixel performance|
A method includes forming a photodiode in a substrate and forming source and drain regions in the substrate. A first rapid thermal anneal (rta) process is performed to anneal the source and drain regions in the substrate.
| Light emitting diode and method for fabricating the same|
The disclosed light emitting diode includes a substrate provided, at a surface thereof, with protrusions, a buffer layer formed over the entirety of the surface of the substrate, a first semiconductor layer formed over the buffer layer, an active layer formed on a portion of the first semiconductor layer, a second semiconductor layer formed over the active layer, a first electrode pad formed on another portion of the first semiconductor layer, except for the portion where the active layer is formed, and a second electrode pad formed on the second semiconductor layer. Each protrusion has a side surface inclined from the surface of the substrate at a first angle, and another side surface inclined from the surface of the substrate at a second angle different from the first angle..
| Power generation system and package|
A power generation system includes an input to receive a low-voltage alternating current and a number n of voltage-conversion modules coupled to the input, each electrically connected in series. Each voltage-conversion module includes a transformer configured to convert the low-voltage alternating current into a high-voltage alternating current.
| Laser device and method|
A laser beam combining and power scaling device and method. A first highly reflective mirror residing perpendicular to the first optical axis reflecting radiation emitted from the first laser head.
| Current limiting control method for diode neutral-point-clamped three-level inverter and related circuit|
The present disclosure discloses a current limiting control method for a diode neutral-point-clamped three-level inverter and a related circuit. When a current in switching tubes is lowered to a value not greater than a first preset current value, the current limiting control method for a diode neutral-point-clamped three-level inverter and the related circuit drive an inside switching tube of the switching tubes to be turned on; after a first delay time, drive another inside switching tube to be turned on; after a second delay time, control an inside switching tube to be turned off and the other inside switching tube to be normally turned on; and control all the switching tubes to be turned on or off according to a control time sequence of the diode neutral-point-clamped three-level inverter circuit..
| Charging circuit for a power converter controller|
A controller includes a first controller terminal, a second controller terminal, a first p-channel metal-oxide-semiconductor field-effect transistor, and a second pmos transistor. The first controller terminal is to be coupled to a bypass capacitor coupled to a secondary side of an isolated power converter.
| Galvanically isolated dc/dc converter and method of controlling a galvanically isolated dc/dc converter|
A galvanically isolated dc/dc converter includes at least one first side converter circuit coupled between a pair of first side dc terminals, and at least one second side converter circuit coupled between a pair of second side dc terminals. The second side converter circuit has at least a first and a second switching element, each including a switch and a diode connected in parallel.
| Rectified high frequency power supply with low total harmonic distortion (thd)|
A method and apparatus that performs ac to dc power conversions without creating significant 50 or 60 hz harmonic currents and voltage distortions on the ac power source conductors thus minimizing the need for ancillary harmonic filtering of 50 or 60 hz harmonics. The method and apparatus is embodied in a circuit that first performs balanced modulation on a 50 hz or 60 hz power voltage converting it to a higher frequency, then subsequently passing the resulting wave through a step-up transformer to produce a higher voltage wave and finally rectifying and filtering the higher voltage wave to produce a dc voltage.
| Backlight assembly and display device|
Exemplary embodiments of the present invention relate to a backlight assembly and a display device, including a backlight unit including a light emitting diode (led) light source of and a light guide, and a bottom chassis disposed at a rear surface of the backlight unit, wherein the bottom chassis includes a bottom chassis main body, an inner supporting member disposed at an inner surface of the bottom chassis main body, an outer supporting member disposed at an outer surface of the bottom chassis main body, and a fastener to fasten at least two of the bottom chassis main body, the inner supporting member, and the outer supporting member.. .
| Led light-source module for an led motor vehicle headlight|
The invention relates to an led light source module (m1 to m4, m1′ to m4′) for an led motor vehicle headlight (swl, swr), in particular for an led motor vehicle headlight (swl, swr) for generating a dynamic light distribution, wherein the led light source module (m1 to m4, m1′ to m4′) comprises at least one led light source (leq), wherein the at least one led light source (leq) is composed of at least one light-emitting diode (led1, led2), wherein the at least one light-emitting diode (led1, led2) of the at least one led light source (leq) couples light into an associated primary lens element (p1 to p4), wherein the in-coupled light at least partially exits a light exit area (l1 to l4) of the primary lens element (p1 to p4) again, wherein the led light source module (m1 to m4, m1′ to m4′) comprises a secondary lens (s1, s2, s3, s4), which images the light exiting the at least one light exit area (l1 to l4) of the at least one primary lens element (p1 to p4)—when the headlight (sw) is installed in a vehicle—as a light pattern onto a region located in front of the vehicle, and wherein according to the invention a diaphragm assembly (bao) is provided between the at least one light exit area (l1 to l4) of the at least one primary lens element (p1 to p4) and the secondary lens (s1 to s4), the diaphragm assembly (bao) comprising at least one optically effective diaphragm edge (bk1, bk2), which is arranged and/or extends such that undesired distortions occurring in an upper and/or lower region of the light pattern are at least partially suppressed in the light pattern.. .
| Frame structure for light emitting diodes|
The invention relates to a frame structure for light emitting diodes comprises plastic stand having a containing room with a conical opening and at least two metal frames being not connected, relatively arranged in the containing room of the plastic stand and one of the metal frames having a concave chip bearing stand for bearing light emitting diodes wherein the conical opening of the plastic stand is greater than the concave chip bearing stand and the concave chip bearing stand has a bottom edge revealed at a bottom of the plastic stand; the area of the concave chip bearing stand is greater than 40% of the area of the conical opening of the plastic stand to increase the cooling area of the metal frames for the light-emitting diodes with the different wattage sharing the same specification frame structure to reduce the cost of metal frames molding.. .
| Lens for controlling illuminance distribution and light-emitting diode package including the lens|
A lens for controlling an illuminance distribution to realize high luminous flux efficiency by maintaining a required beam angle and uniformity on an illumination surface having a particular shape, such as a square shape, and a light-emitting diode (led) package including the lens are provided. The lens includes an incidence surface onto which light emitted from a light-emitting device is incident, and an emission surface through which the light incident onto the incidence surface is emitted.
| Illuminating apparatus|
An illuminating apparatus includes a lamp member, a lighting member, a waterproof member, and cooling liquid. The lamp member has a closed chamber, in which the cooling liquid is filled.
| System for adapting an existing florescent light fixture with an led luminaire|
A device and method for retrofitting a light fixture from a conventional fluorescent or tube or metal halide lamp, to use with a light emitting diode (led) based lamp assembly. The lamp fixture has a magnetized flat wall curved extending outer from the base.
| Led lighting apparatus for use with ac-output lighting ballasts|
An apparatus for interfacing a ballast to at least one light emitting diode (led) includes a passive rectifier circuit and matching circuit coupled to an input port and/or an output port of the passive rectifier circuit and configured to at least partially match an impedance of the ballast.. .
| Explosion-proof led module|
An explosion-proof led module has at least one light-emitting diode, a heat sink connected to this and an led cover that covers the led at least in the emission direction. The led cover extends into an insertion recess of the heat sink.
| Electro-optical distance measuring device|
An electro-optical distance measuring device includes a laser driver for a laser diode for emitting laser light pulses. The measuring device further includes a laser diode voltage supply having a cascade of at least two voltage regulators, each of which provides an output voltage at a level below a laser threshold voltage of the laser diode.
| Light emitting device, super luminescent diode, and projector|
A light emitting device includes: an active layer; and a first cladding layer and a second cladding layer that sandwich the active layer, wherein the active layer forms an optical waveguide that guides light, a traveling direction of the light guided in the optical waveguide changes at a first reflection part provided on a first side surface of the active layer, and the first reflection part is located outside of a region in which the first cladding layer and the second cladding layer are provided in a plan view.. .
| Message projection system|
A message display that produces a visible message by projecting an image on a surface such as a wall or floor. A bright light source is provided, preferably including an array of light emitting diodes (“led's”).
| Rotatable optical device housing and mounting platform|
A rotatable optical device housing and mounting platform is disclosed. The optical device housing includes a bezel, front housing and rear housing.
| Organic light emitting display device and driving method thereof|
An organic light emitting display device includes pixels positioned at crossing regions between data lines and scan lines, each of the pixels including an organic light emitting diode, a scan driver configured to supply a scan signal to scan lines, a data driver configured to drive the data lines, wherein the data driver includes, in each channel, a supply part comprising a digital-to-analog converter configured to generate data signals using second data supplied from outside in a driving period, and a deterioration part configured to measure deterioration information of the organic light emitting diode using the digital-to-analog converter in a sensing period.. .
| Organic light emitting diode display device and driving method thereof|
An organic light emitting diode (oled) display device includes a plurality of oled pixels, a gate driver, a source driver, and a voltage controller. Each of the oled pixels includes a current control switch and an oled.
| Pixel circuits and driving schemes for active matrix organic light emitting diodes|
A pixel driving circuit includes a storage capacitor, a first, a second, and a third transistor. A method for driving an organic light emitting diode (oled) display includes controlling the second transistor by a first signal from a gate line such that the second transistor is switched “off” for a first phase, and “on” for a second phase and a third phase, “off” for a fourth phase.
| Control and monitoring of light-emitting-diode (led) bulbs|
A smart light-emitting-diode (led) bulb includes apparatus enabling the bulb to be turned on, off, or dimmed without the use of a wall switch. Such apparatus may include circuitry responsive to rotating the led portion of the bulb, circuitry responsive to touching or tapping on the bulb, or a bluetooth or wifi interconnection enabling the bulb to be controlled using a smartphone or other device executing a bulb-control application.
| Electronic apparatus|
An electronic apparatus includes a switching element which has a control terminal and is driven by controlling voltage of the control terminal, a driving power supply circuit which supplies voltage required for driving the switching element, an on-driving circuit which is connected to the driving power supply circuit and the control terminal of the switching element and is supplied with voltage from the driving power supply circuit, and which applies a constant current to the control terminal of the switching element to charge the control terminal, thereby turning on the switching element, and at least one diode which is connected between the on-driving circuit and the control terminal of the switching element. The on-driving circuit applies a constant current to the control terminal of the switching element through the diode..
| Desaturation detection circuit for use between the desaturation detection input of an optocoupler and the output of a power switching device|
A desaturation detection circuit for use between the desaturation detection input of an optocoupler and the output of a power switching device, the desaturation detection circuit comprising: a threshold setting element having an input and an output, the input for connection to the output of a power switching device via one or more diode(s), the threshold setting element being arranged to set a threshold voltage at the input at which the threshold setting element will provide an output at the output of the threshold setting element when the input voltage is exceeded, and a detector having an input connected to the output of the threshold setting element and an output connectable to a desaturation detection input of an optocoupler, the detector being arranged to detect an output at the output of the threshold setting element and in response to provide a control signal at the output of the detector for the desaturation detection input to trigger a desaturation routine in the optocoupler.. .
| Methods and structures for dynamically calibrating reference voltage|
A bandgap reference system has a bandgap circuit, an operational transconductance amplifier, and an offset controller. The bandgap circuit includes a pair of diode devices and has a reference terminal at which is provided a bandgap reference voltage.
| Power conversion device|
A power conversion device for driving a load, including a power conversion device main body configured to receive an input of a power supply voltage and to drive the load, and a brake circuit configured to protect the power conversion device main body from overvoltage applied thereto. The brake circuit includes a zener diode that becomes conductive when the voltage applied to the power conversion device main body exceeds a predetermined value, to thereby suppress the voltage..
| Apparatus and method for coupling power source to lamp|
An apparatus coupling a power source to a light emitting diode lamp includes a first part for receiving first voltage and current signals from the power source and a second part for supplying second voltage and current signals to the lamp. The first part includes a detection part for detecting a first amplitude reduction in at least one of the first signals, for example in the first voltage signal, and the second part includes an introduction part for, in response to a detection result, introducing a second amplitude reduction into at least one of the second signals, for example into the second current signal.
| Dimming control system for solid state illumination source|
A system for dimming a solid state illumination source, such as a light emitting diode, including a low pass analog filter operative to extract a direct current (dc) voltage component from an incoming alternating current (ac) waveform. A microprocessor is structured to digitally filter the dc voltage resulting from the analog filter and extract dimming data associated with a dimming operation of the led.
| Light emitting module|
A light emitting diode module includes a main base board, a wireless communication module, multiple light emitting diodes, a power output control system and a control unit. The wireless communication module is used for receiving a control signal.
| Ac led lighting apparatus using voltage edge detector|
Exemplary embodiments of the present invention disclose an alternating current (ac) light emitting diode (led) lighting apparatus including a rectification unit configured to receive an ac voltage and output a dc rectified voltage, an led unit connected to the rectification unit, the led unit comprising at least two light emitting groups, each light emitting group comprising at least one led, and an led driving control unit connected to the rectification unit, the led driving control unit configured to establish a series or parallel connection between the light emitting groups, by comparing a voltage level of the rectified voltage with a reference voltage. The led driving control unit is configured to calculate a reference voltage adjustment value in order to compensate for a signal processing delay of the led driving control unit..
| Electronic ballast-compatible lighting driver for light-emitting diode lamp|
A lighting driver includes a rectifier having an input connected to receive ac electrical power from an electronic ballast and having an output connected to supply a current to a plurality of light emitting diodes (leds) arranged in series with each other in a string, and a switching device disposed at the output of the rectifier and configured to receive a switching control signal and in response thereto to execute a switching operation to modulate an amount of power supplied to the plurality of leds so as to cause an average of the power supplied to the plurality of leds to be equal to a target power level. A current sensor may be provided to sense the current, and a controller configured to control the switching operation of the switching device in response to the sensed current..
| Led lighting apparatus for use with ac-output lighting ballasts|
A lighting apparatus includes at least one light emitting diode (led) and a passive resonant converter circuit having an output coupled to the at least one led and an input configured to be coupled to a ballast that produces an ac output. The passive resonant converter circuit may include a combination of a passive rectifier circuit, such as a passive diode bridge, and a resonant circuit, such as a cl resonant circuit.
| Semiconductor device and method for manufacturing same|
The present specification relates to a semiconductor device in which a metal plate is attached onto a surface of a resin package, and provides a structure in which the metal plate is not easy to separate. The semiconductor device disclosed in the present specification includes semiconductor chips (igbt, diode), a resin package molding the semiconductor chips, and metal plates fixed onto the surface of the resin package.
| Optical sensor with integrated pinhole|
An optical sensor includes a semiconductor substrate having a first conductive type. The optical sensor further includes a photodiode disposed on the semiconductor substrate and a metal layer.
| Shallow junction photodiode for detecting short wavelength light|
The present invention is a photodiode or photodiode array having improved ruggedness for a shallow junction photodiode which is typically used in the detection of short wavelengths of light. In one embodiment, the photodiode has a relatively deep, lightly-doped p zone underneath a p+ layer.
| Field effect transistor and schottky diode structures|
In accordance with an embodiment a structure can include a monolithically integrated trench field-effect transistor (fet) and schottky diode. The structure can include a first gate trench extending into a semiconductor region, a second gate trench extending into the semiconductor region, and a source region flanking a side of the first gate trench.
| Photodiode and production method|
The photodiode has a p-type doped region (2) and an n-type doped region (3) in a semiconductor body (1), and a pn junction (4) between the p-type doped region and the n-type doped region. The semiconductor body has a cavity (5) such that the pn junction (4) has a distance (d) of at most 30 μm from the bottom of the cavity (7)..
| Light emitting diode package having heat dissipating slugs|
A light emitting diode package having heat dissipating slugs is provided. The light emitting diode package comprises first and second heat dissipating slugs formed of a conductive material and spaced apart from each other; a package main body coupled to the first and second heat dissipating slugs to support the first and second heat dissipating slugs; and a light emitting diode die electrically connected to the first and second heat dissipating slugs, wherein the respective first and second heat dissipating slugs are exposed to the outside through lower and side surfaces of the package main body.
| Composite high reflectivity layer|
A high efficiency light emitting diode with a composite high reflectivity layer integral to said led to improve emission efficiency. One embodiment of a light emitting diode (led) chip comprises an led and a composite high reflectivity layer integral to the led to reflect light emitted from the active region.
| Led lens and led package using the same|
A light emitting diode (led) lens comprises a light incident surface on a bottom surface of the led lens facing a light source. A light exit surface, having a size greater than the bottom surface, is defined by a top surface of the led lens.
| Light-emitting diode display substrate, method for manufacturing same, and display device|
A light-emitting diode (led) display substrate, a method for manufacturing the same, and a display device are provided and involve the display field. The method for manufacturing the led display substrate comprises: forming a transparent conductive anode (201) on a substrate (200); forming a pixel region defined by a first pdl (202) and a second pdl (203) on the substrate (200) on which the anode (201) is formed, in which the second pdl (203) made of a hydrophobic material is disposed on the first pdl (201) made of a hydrophilic material; filling a luminescent material into the pixel region to form an emission layer (204) with the luminescent material; and forming a conductive cathode (205) on the substrate (200) on which the emission layer (204) is formed.
| Gallium nitride devices|
Semiconductor structures comprising a iii-nitride (e.g., gallium nitride) material region and methods associated with such structures are provided. In some embodiments, the structures include an electrically conductive material (e.g., gold) separated from certain other region(s) of the structure (e.g., a silicon substrate) by a barrier material in order to limit, or prevent, undesirable reactions between the electrically conductive material and the other component(s) which can impair device performance.
| Organic light emitting diode|
The present invention relates to an organic light emitting diode and a method of manufacturing the same. An organic light emitting diode according to the present invention comprises an exciton blocking layer comprising a compound represented by formula 1 to confine an exciton to a light emitting layer to prevent light emitting leakage, and thus there is an effect of implementing an organic electroluminescence diode having excellent light emitting efficiency.
| Switchable memory diodes based on ferroelectric/conuugated polymer heterostructures and/or their composites|
An embodiment of the present memory cell a first layer of a chosen conductivity type, and a second layer which includes ferroelectric semiconductor material of the opposite conductivity type, the layers forming a pn junction. The first layer may be a conjugated semiconductor polymer, or may also be of ferroelectric semiconductor material.
| Organic light emitting display|
An organic light emitting display (oled) is disclosed. The oled includes a storage capacitor formed in a first region of the substrate, a thin film transistor formed in a second region of the substrate, a first data line capacitor formed in a third region of the substrate, an organic light emitting diode formed on the storage capacitor and the thin film transistor, and a second data line capacitor formed on the data line capacitor..
| Organic light emitting diode and method of fabricating the same|
The organic light emitting diode includes a first electrode, an emission layer disposed on the first electrode and including a host, an emitting dopant and an auxiliary dopant, and a second electrode disposed on the emission layer. Here, the auxiliary dopant has a higher band gap energy than the host.
| Compound for organic optoelectronic device, organic light emitting diode including the same, and display including the organic light emitting diode|
Wherein groups x1 to x8, y1, y2, l1, l2, ar1, ar2, and variables m1, m2, n1, and n2 are described in the specification.. .
| Organic light emitting diode, method for producing an organic light emitting diode and module comprising at least two organic light emitting diodes|
An organic light emitting diode includes a substrate and an organic layer sequence, which generates electromagnetic radiation during operation. The organic layer sequence is arranged in a central region of the substrate a metallization is arranged in an edge region of the substrate and is designed for making electrical contact with the organic layer sequence.
| Quasi-surface emission vertical-type organic light-emitting transistors and method of manufacturing the same|
An organic light-emitting transistor may include a mesh-type source electrode having a plurality of apertures in an array pattern. The mesh-type source electrode may be located between the gate electrode and the drain electrode.
| Diode and display panel|
The present invention provides a diode and display panel, which includes: cathode and anode; wherein, cathode and anode being disposed relatively. Electron transport layer is disposed between cathode and anode.
| Active matrix organic light emitting diode display having variable optical path length for microcavity|
An organic light emitting diode display includes an array of pixels on a substrate. Each pixel includes three sub-pixels that emits light of different wavelengths from each other.
| Radiation detector|
There is provided a radiation detector that appropriately corrects an offset within a minute read cell without increasing area while achieving high-speed measurement at a high counting rate. A radiation detector 100 having a plurality of single-photon-counting imaging cells includes, for each imaging cell, a photodiode 3 which is applied with a reverse bias voltage and generates a current signal in response to incidence of radiation, a previous-stage da converter d1 configured to correct an input signal based on the current signal generated by the photodiode 3, an amplifier k2 configured to amplify the signal corrected by the previous-stage da converter d1, a subsequent-stage da converter d2 configured to correct a charge signal amplified by the amplifier k2, a wave height discriminator 9 configured to discriminate output signals based on the signal corrected by the subsequent-stage da converter d2, and a counter 10 configured to count the discriminated signals..
| Well tool having optical triggering device for controlling electrical power delivery|
A method of controlling electrical power delivery to a well tool can include transmitting trigger light via an optical waveguide to a circuit in a well, and the circuit delivering the electrical power to the well tool in response to the circuit receiving the trigger light. A circuit for supplying electrical power to at least one well tool can include a photodiode which receives light from an optical waveguide in a well, a voltage increaser which increases a voltage output by the photodiode, and an electrical energy storage device which receives electrical energy via the voltage increaser, whereby the electrical power can be supplied to the downhole well tool from the storage device..
| Method for producing sapphire substrate used in light emitting diode|
In a method, a sapphire raw material is placed into the recess of a mold and melted by heating to infill the recess by capillary action to form a liquid film. A sapphire seed having a specific growing plane is moved to dip the growing plane into the liquid film, thus forming a solid-liquid interface.
|Laser diode package|
A laser package for use in a dermatological treatment device may include a conductive carrier, an insulation layer arranged over a first region of a first side of the conductive carrier, a semiconductor laser device mounted to a second region of the first side of the conductive carrier, and a conductive film secured to the semiconductor laser device and extending over at least a portion of the insulation layer, such that the conductive film is insulated from the conductive carrier by the insulation layer, and wherein a coefficient of thermal expansion of the semiconductor laser device differs from a coefficient of the conductive carrier to which it is mounted by more than 20%.. .
|Organic light emitting diode display and method for manufacturing the same|
An organic light emitting diode (oled) display and a manufacturing method thereof, the oled display includes: a substrate main body; a polycrystalline silicon layer pattern including a polycrystalline active layer formed on the substrate main body and a first capacitor electrode; a gate insulating layer pattern formed on the polycrystalline silicon layer pattern; a first conductive layer pattern including a gate electrode and a second capacitor electrode that are formed on the gate insulating layer pattern; an interlayer insulating layer pattern formed on the first conductive layer pattern; and a second conductive layer pattern including a source electrode, a drain electrode and a pixel electrode that are formed on the interlayer insulating layer pattern. The gate insulating layer pattern is patterned at a same time with any one of the polycrystalline silicon layer pattern and the first conductive layer pattern..
|Visible light communication method using dmx-512 network and device for the same|
Disclosed herein is a visible light communication method and device using a dmx-512 network. In the visible light communication method, dimming data packets are received.
|System for transmitting optical signals|
Optical signal emission system comprising a passive optical chip (6) and a laser diode (2) disposed at the boundary of said passive optical chip (6), said passive optical chip (6) being furnished with a reflecting structure (5) in upper surface, of a waveguide (7) in upper surface, passing through said passive optical chip (6), linked to the output of said laser diode (2) and passing through said reflecting structure (5), and of an active or non-linear thin layer portion (8) powered by said laser diode (2), covering a part of said waveguide (7), between said laser diode (2) and said reflecting structure (5).. .