Abstract: A device comprising a conversion channel including: a first end configured to accept ambient electromagnetic radiation, the ambient electromagnetic radiation having an initial frequency, a second end configured to allow the ambient electromagnetic radiation to exit, and at least two opposing walls connecting the first end and the second end, wherein the at least two opposing walls include one or more crystals, the at least two opposing walls being separated by at least one-half of a wave length; wherein when the ambient electromagnetic radiation interacts with the one or more crystals of the at least two opposing side walls, the initial frequency of the ambient electromagnetic radiation being repeatedly increased to an optimal frequency is provided. Furthermore, an associated method is also provided.

Abstract: An optical package is provided comprising a laser diode and a wavelength conversion device. The laser diode and the wavelength conversion device define an external laser cavity and the wavelength conversion device is tilted relative to the output face of the laser diode to define a tilt angle ? that is less than approximately 85°. The input face of the wavelength conversion device comprises a pair of tapered facets and a microlens. The pair of tapered facets and the microlens are defined on the input face such that they share respective portions of the facial waveguide region on the input face, with the tapered facets occupying peripheral portions of the facial waveguide region on the input face and the microlens occupying an interior portion of the facial waveguide region on the input face. Each of the pair of tapered facets define a facet angle ? within the facial waveguide region that is less than the facet angle ? and is greater than approximately 45°. Additional embodiments are disclosed and claimed.

Abstract: A device for increasing the spectral bandwidth of optical pulses, comprises a hollow fiber waveguide, optical components for focusing the beam into the hollow fiber waveguide and for re-collimating the beam at the exit of the hollow fiber waveguide, the hollow fiber waveguide being contained in an air-tight chamber filled with a gas at a given pressure; the length of the hollow fiber is such that, for a given input pulse energy and gas pressure, the energy contained in a fundamental propagation mode of the optical pulses that has minimum propagation losses exhibits substantially periodic oscillations over the full length of the hollow fiber waveguide and reaches a local maximum at the output end of the said hollow fiber waveguide.

Abstract: A method of optical communication includes generating an amplified optical signal from at least a portion of a first optical signal having a first carrier wavelength, ?1. The amplified optical signal is applied to Brillouin media to stimulate generation of a Brillouin effect signal at a wavelength ?2. The Brillouin effect signal is modulated to produce a second optical signal having a second carrier wavelength, ?2. In one embodiment, the first optical signal is a downstream optical signal and the second optical signal is an upstream optical signal of a passive optical network.

Abstract: A light emitting apparatus has a radiation source for emitting short wavelength radiation. A down conversion material receives and down converts at least some of the short wavelength radiation emitted by the radiation source and back transfers a portion of the received and down converted radiation. An optic device adjacent the down conversion material at least partially surrounds the radiation source. The optic device is configured to extract at least some of the back transferred radiation. A sealant substantially seals a space between the radiation source and the optic device.

Abstract: A wavelength conversion system includes a Mach-Zehnder interferometer including two optical waveguides, a non-linear medium provided on one of the two optical waveguides, and a branching ratio adjuster for adjusting the branching ratio of multiplexed light produced by multiplexing signal light and pumping light so that the powers of the signal light and the pumping light which are to be emitted from the two optical waveguides are equal to each other. The multiplexed light whose branching ratio is adjusted by the branching ratio adjuster is introduced into the two optical waveguides such that the non-linear medium generates phase conjugation light of the signal light and the light guided through the one optical waveguide and the light guided through the other one of the two optical waveguides interfere with each other so that the phase conjugation light is extracted as wavelength conversion light.

Abstract: A method and apparatus for receiving a digital signal having a plurality of significant bits of resolution. The apparatus includes a mode locked laser comprising a single output. The apparatus also includes a beam divider operable to receive the single output. The apparatus also includes a plurality of optical modulators operable to communicate with said beam divider and operable to receive a respective plurality of signals corresponding to a plurality of significant bits of resolution. Optionally, the apparatus also includes a source operable to output a digital waveform with the plurality of signals corresponding to the plurality of significant bits of resolution of the digital waveform, the plurality of signals operable to drive the plurality of optical modulators.

Abstract: An optical package is provided comprising a laser diode and a wavelength conversion device. The laser diode and the wavelength conversion device define an external laser cavity and the wavelength conversion device is tilted relative to the output face of the laser diode to define a tilt angle ? that is less than approximately 85°. The input face of the wavelength conversion device comprises a pair of tapered facets and a microlens. The pair of tapered facets and the microlens are defined on the input face such that they share respective portions of the facial waveguide region on the input face, with the tapered facets occupying peripheral portions of the facial waveguide region on the input face and the microlens occupying an interior portion of the facial waveguide region on the input face. Each of the pair of tapered facets define a facet angle ? within the facial waveguide region that is less than the facet angle ? and is greater than approximately 45°. Additional embodiments are disclosed and claimed.

Abstract: A frequency-conversion method that uses a nonlinear optical process to transfer energy between a surface-plasmon (SP) wave that is guided along an electrically conducting strip and a light beam that is guided along an optical waveguide whose core is adjacent to the electrically conducting strip. A periodic structure spatially modulates the nonlinear susceptibility of the waveguide core with a spatial period that is related to a momentum mismatch in the nonlinear optical process. The spatial modulation provides quasi-phase matching for the SP wave and the light beam and enables efficient energy transfer between them.

Abstract: A waveguide device for frequency mixing or conversion through birefringent phase matching, having two suspended horizontal waveguides with an air-filled horizontal nanoslot between them. The waveguides are formed of a material with a high nonlinear susceptibility, and one waveguide can be n-doped with the other waveguide slab being p-doped. The system can be tuned to operate at different frequencies by varying the nanoslot gap distance by electrostatically actuating the suspended air-clad waveguides.

Abstract: An optical waveguide device comprises a plurality of mirrors, wherein at least one mirror comprises a first and second reflective end that reflect and transmit light. The plurality of mirrors comprises at least one first material having at least one first refractive index; an axis line; a first cladding comprising a second material having a second refractive index; a second cladding, formed above the first, comprising a third material having a third refractive index; a core comprising a fourth material; and a plurality of core parts formed within at least one of the first or second claddings. The fourth material has a fourth refractive index that is greater than the second and third refractive indices and the core parts have a plurality of core part ends coupled to one of the reflective ends where at least one core part end is approximately parallel to one of the reflective ends.

Abstract: A laser source includes a laser device configured to emit laser light at a given angle with respect to a normal of an output end face; and an optical device configured to include an optical waveguide that guides and outputs the laser light. The output end face of the laser device is parallel to an input end face of the optical device, and the optical waveguide extends in a direction of ?w1 that is given by ?w1=arcsin(sin ?a1/nF), where ?a1 denotes an outgoing angle of the laser light from the laser device, and nF denotes an effective refractive index of the optical waveguide for the laser light.

Abstract: An optical frequency converter that uses a nonlinear optical process to transfer energy between a surface-plasmon (SP) wave that is guided along an electrically conducting strip and a light beam that is guided along an optical waveguide whose core is adjacent to the electrically conducting strip. The optical frequency converter has a periodic structure that spatially modulates the nonlinear susceptibility of the waveguide core with a spatial period that is related to a momentum mismatch in the nonlinear optical process. The spatial modulation provides quasi-phase matching for the SP wave and the light beam and enables efficient energy transfer between them.

Abstract: A wavelength conversion device includes a supporting body, a wavelength conversion substrate of a Z-plate of a ferroelectric single crystal with a periodic domain inversion structure formed therein and having a thickness “T” of 10 ?m or more and 100 ?m or less, a buffer layer provided on a bottom face of the wavelength conversion substrate, and an organic resin adhesive layer adhering the supporting body and buffer layer with a thickness of 0.6 ?m or more and 2.0 ?m or less.

Abstract: A harmonic wave oscillating system includes a solid-state laser oscillator, a converting waveguide converting a wavelength of a laser light oscillated from the solid-state laser oscillator to oscillate a harmonic wave, an incident-side end face of the laser light, an emitting-side end face of the harmonic wave, a first side face and a second side face. The emitting-side end face includes a polished surface 6 formed on the side of the first side face 1a and a light scattering surface formed on the side of the second side face 1b. The first side face 1a and polished surface 6 are intersected at an obtuse angle ?, and the second side face 1b and light scattering surface 5 are intersected at an obtuse or right angle ?.

Abstract: Apparatus and methods for second harmonic generation with a waveguide. In one embodiment, a method includes the steps of providing a waveguide, wherein the waveguide has a substrate, and a polydomain epitaxial thin film on the substrate, wherein the polydomain epitaxial thin film defines a plane and has a first surface and a second, opposite surface defining a body portion of the polydomain epitaxial thin film therebetween with a film thickness, l, and wherein the polydomain epitaxial thin film has a coherence length, lc, and exposing the waveguide to an incident photon beam with a wavelength and a focal point such that the incident photon beam is incident to the plane of the polydomain epitaxial thin film with an angle ? that is formed between the incident beam and the plane of the polydomain epitaxial thin film and satisfies the condition of 0<?<90, wherein the polydomain epitaxial thin film is formed with the following condition satisfied: l<lc.

Abstract: A light emitting apparatus has a radiation source for emitting short wavelength radiation. A down conversion material receives and down converts at least some of the short wavelength radiation emitted by the radiation source and back transfers a portion of the received and down converted radiation. An optic device adjacent the down conversion material at least partially surrounds the radiation source. The optic device is configured to extract at least some of the back transferred radiation. A sealant substantially seals a space between the radiation source and the optic device.

Abstract: A wavelength converter includes an optical resonator that is optically coupled to a waveguide. The refractive index of the optical resonator is dynamically changed, such as by injecting free carriers into the resonator. This effectively changes that optical path length of the light, thus converting the wavelength.

Abstract: A robust, quickly tunable narrow-linewidth entangled photon source system based on Spontaneous Parametric Down Conversion (SPDC) of the pump light in periodically polled LiNbO3 (PPLN) waveguides. The photon source provides narrow-linewidth, entangled output photons having a wavelength in the telecom C-Band wavelength. To tailor the output spectrum of the output photons, the PPLN waveguide is arranged between two end waveguides having LiNbO3-embedded Bragg gratings, thereby forming a tunable Fabry-Perot cavity. The resulting narrow output linewidth of the output photons makes the system desirable for use in a long-distance quantum key distribution (QKD) system.

Abstract: An optical package includes a semiconductor laser, a wavelength conversion device and a MEMS-actuated mirror oriented on a base module to form a folded optical pathway between an output of the semiconductor laser and an input of the wavelength conversion device. An optical assembly is located in a mechanical positioning device and the mechanical positioning device is disposed on the base module along the optical pathway such that the beam of the semiconductor laser passes through the optical assembly, is reflected by the MEMS-actuated mirror back through the optical assembly and into the waveguide portion of the wavelength conversion device. The MEMS-actuated mirror is operable to scan the beam of the semiconductor laser over the input of the wavelength conversion device. The optical assembly may be adjusted along the optical pathway with the mechanical positioning device to focus the beam into the waveguide portion of the wavelength conversion device.

Abstract: Systems and methods for generating electromagnetic waves are provided. In one embodiment, a system for generating electromagnetic waves is provided. The system comprises a dielectric column comprising a spherical portion and at least one cylindrical portion, wherein the spherical portion receives a first wave from a first source and a second wave from a second source and generates a resulting electromagnetic wave along the interior of the cylindrical portion having a difference frequency caused by whispering gallery modes of the spherical portion, and the at least one cylindrical portion having at least one output for outputting the resulting electromagnetic wave.

Abstract: A wavelength converter including a fiber provided with a laser active substance and formed with first and second fiber gratings embedded in the fiber, a laser light source that allows pumping light to be incident on the fiber, a laser resonator formed by optically connecting the fiber and the laser light source, and a wavelength conversion element that converts the fundamental wave of a laser beam emitted from the laser resonator into a higher harmonic wave. The fiber absorbs a part of an output of the fundamental wave or the pumping light, and heats the second fiber grating. The temperature of the second fiber grating is adjusted in accordance with an output of the higher harmonic wave outputted from the wavelength conversion element.

Abstract: An optical repeater device of the present invention comprises: a preamble compensating circuit 53, for taking out a normal data signal from burst signals propagating through a communication transmission path, and for adding a preamble signal before and/or after the data signal. Furthermore, the preamble compensating circuit 53 comprises: a detector circuit 53a, for inputting the burst signal, and for outputting only the normal data signal; a buffer circuit 53b, for storing the data signal output from the detector circuit 53a, and for outputting thereof; a preamble signal generation circuit 53d, for outputting at least one type of the preamble signal; and an data output select circuit 53e, for outputting the data signal at the time of the data signal input from the buffer circuit 53b, and for outputting the preamble signal from the preamble signal generation circuit 53d at any other time thereof.

Abstract: The present invention relates generally to wavelength conversion devices and laser projection systems incorporating the same. According to one embodiment of the present invention, wavelength conversion devices are provided without limitation of their field of use to laser projection systems. For example, the wavelength conversion device may comprise an axial waveguide portion and a pair of lateral planar waveguide portions confined between a pair of relatively low index cladding layers. The effective index of refraction in the axial waveguide portion of the waveguide region and the effective index of refraction in the lateral planar waveguide portions of the waveguide region are established such that the relatively low intensity laterally distributed parasitic light is characterized by a scattering angle ? that is at least as large as the beam divergence angle of the relatively high intensity light propagating in the axial waveguide portion.

Abstract: Systems and methods for generating electromagnetic waves are provided. In one embodiment, a system for generating electromagnetic waves is provided. The system comprises a dielectric column comprising a spherical portion and at least one cylindrical portion, wherein the spherical portion receives a first wave from a first source and a second wave from a second source and generates a resulting electromagnetic wave along the interior of the cylindrical portion having a difference frequency caused by whispering gallery modes of the spherical portion, and the at least one cylindrical portion having at least one output for outputting the resulting electromagnetic wave.

Abstract: The present invention relates generally to multi-faceted wavelength conversion devices and laser projection systems incorporating the same.

Abstract: A wavelength conversion device has a supporting substrate, and a wavelength conversion element provided on the supporting substrate, with separate portions provided on both sides of the wavelength conversion element. The separate portions are separated from the wavelength conversion element by an adhesive layer that bonds the supporting substrate and the wavelength conversion element while also bonding the supporting substrate with the separate portions. The element and separate portions are made of ferroelectric materials, respectively. The wavelength conversion element has a ridge optical waveguide, with grooves provided on each or both sides of the ridge optical waveguide and extended portions provided on the outside of each of the grooves.

Abstract: A light source can have a conversion element disposed at one end of an optical waveguide and a semiconductor light source disposed at the other end. The optical waveguide can include a heat-conducting layer at its end proximate the converter.

Abstract: A wavelength conversion module includes: a first fundamental wave propagation optical fiber for propagating a fundamental wave emitted from a laser light source; a first wavelength conversion element, optically connected to the first fundamental wave propagation optical fiber, for converting the fundamental wave emitted from the first fundamental wave propagation optical fiber into a harmonic wave; and a first harmonic propagation optical fiber, optically connected to the first wavelength conversion element, for propagating the harmonic wave emitted from the first wavelength conversion element, wherein the core diameter of the first harmonic propagation optical fiber is 0.5 to 0.9 times as large as the core diameter of first fundamental wave propagation optical fiber.

Abstract: A wavelength converter comprising an arsenic sulfide (As—S) chalcogenide glass fiber coupled to an optical parametric oscillator (OPO) crystal and a laser system using an OPO crystal coupled to an As—S fiber are provided. The OPO receives pump laser radiation from a pump laser and emits laser radiation at a wavelength that is longer than the pump laser radiation. The laser radiation that is emitted from the OPO is input into the As—S fiber, which in turn converts the input wavelength from the OPO to a desired wavelength, for example, a wavelength beyond about 4.4 ?m. In an exemplary embodiment, the OPO comprises a periodically poled lithium niobate (PPLN) crystal. The As—S fiber can include any suitable type of optical fiber, such as a conventional core clad fiber, a photonic crystal fiber, or a microstructured fiber.

Abstract: A high frequency electrical signal control device comprises a transmitter for generating a high frequency electrical signal, a receiver, a transmission line for propagating the electrical signal, and a structure for radiating the electrical signal propagated through the transmission line to the space or receiving a signal from the space. The degree of coupling of the electrical signal between the space and the transmission line provided by the structure can be variably controlled.

Abstract: There is provided a structure for supporting propagation of surface plasmon polaritons. The structure includes a plasmonic material region and a dielectric material region, disposed adjacent to a selected surface of the plasmonic material region. At least one of the plasmonic material region and the dielectric material region have a dielectric permittivity distribution that is specified as a function of depth through the corresponding material region. This dielectric permittivity distribution is selected to impose prespecified group velocities, vgj, on a dispersion relation for a surface polaritonic mode of the structure for at least one of a corresponding set of prespecified frequencies, ?j, and corresponding set of prespecified wavevectors, kj, where j=1 to N.

Abstract: An optical coupling device for coupling light with an optical waveguide comprises a mirror formed within an optical waveguide. The mirror comprises a first material, a first reflective end, and a second reflective end. The first material is light conducting and has a first refractive index. The first and second reflective ends reflect and transmit light. The mirror has an axis line. The optical coupling device is useful for extracting light from a waveguide and providing a backlight for a liquid crystal display.

Abstract: An optical fiber lighting apparatus includes an exciting light source, a first optical fiber, a second optical fiber, a wavelength conversion unit, and a reflecting member. The first optical fiber guides the exciting light emitted from the exciting light source. The wavelength conversion unit receives the exciting light exiting from the first optical fiber to generate a wavelength-converted light having a wavelength different from that of the exciting light. The second optical fiber guides at least part of the wavelength-converted light generated by the wavelength conversion unit. The reflecting member reflects, of the reflected scattered light and/or the wavelength-converted light generated by the wavelength conversion unit, at least part of light that has not directly struck the incident region of the second optical fiber, toward the incident region of the second optical fiber.

Abstract: Devices and methods are disclosed for realizing a high quality bulk domain grating structure utilizing mobile charges that are generated by means of photo-excitation in a substrate. An effect of light exposure (UV, visible, or a combination of wavelengths) is to generate photo-induced charges. The application of a voltage across the substrate combined with the application of light exposure causes a photo-induced current to flow through the substrate. The photo-induced charges (behaving like virtual electrode inside the material) and the photo-induced current result in both reduction of the coercive field required for domain inversion in the material and improve realization of the domain inversion pattern, which previously has not been possible at room temperature.

Abstract: The present invention relates generally to wavelength conversion devices and laser projection systems incorporating the same. According to one embodiment of the present invention, wavelength conversion devices are provided without limitation of their field of use to laser projection systems. For example, the wavelength conversion device may comprise a waveguide region comprising a relatively linear waveguide portion and a pair of lateral planar waveguide portions. The output face of the wavelength conversion device comprises a multi-component output face comprising a core portion and a pair of lateral portions. The lateral portions of the output face are configured to be relatively non-transmissive and the waveguide region is structured such that an optical signal propagating along the waveguide region will define relatively low intensity laterally distributed parasitic light in substantial alignment with the lateral planar waveguide portions along the lateral, non-transmissive portions of the output face.

Abstract: Various embodiments of the present invention are directed to compact systems for generating polarization-entangled photons. In one embodiment of the present invention, a non-degenerate, polarization-entangled photon source comprises a half-wave plate that outputs both a first pump beam and a second pump beam, and a first beam displacer that directs the first pump beam into a first transmission channel and the second pump beam into a second transmission channel. A down-conversion device converts the first pump beam into first signal and idler photons and converts the second pump beam into second signal and idler photons. A second beam displacer directs both the first signal and idler photons and the second signal and idler photons into a single transmission channel. A dichroic mirror directs the first and second signal photons to a first fiber optic coupler and the first and second idler photons to a second fiber optic coupler.

Abstract: A wavelength conversion device is provided having a ridge optical waveguide and a periodic domain inversion structure formed in the waveguide. The optical waveguide has side wall faces, an upper face and edge areas formed between the upper face and the side wall face, respectively. R-faces are formed on the edge areas.

Abstract: A high frequency electrical signal control device comprises a transmitter for generating a high frequency electrical signal, a receiver, a transmission line for propagating the electrical signal, and a structure for radiating the electrical signal propagated through the transmission line to the space or receiving a signal from the space. The degree of coupling of the electrical signal between the space and the transmission line provided by the structure can be variably controlled.

Abstract: A light-emitting device, comprising: a radiation source (5), which emits radiation having a first wavelength, an optical waveguide (10), into which the radiation emitted by the radiation source is coupled, and a converter material (15), which converts the radiation transported through the optical waveguide (10) into light (20) having a second, longer wavelength. A light-emitting device of this type can have an improved light conversion efficiency.

Abstract: When one tries to obtain high-output wavelength conversion light of class W, the internal temperature of a wavelength conversion element rises significantly to cause an undue variation in phase matching wavelength and thereby it is difficult to match the wavelength of a fundamental wave to the phase matching wavelength. A part of the output of the fundamental wave or pumping light propagating on a fiber is thereby absorbed by doping the fiber with a rare earth element at a set concentration, and the temperature of a fiber grating is raised by heating the fiber grating with heat produced through the absorption. Consequently, the wavelength of the fundamental wave obtained through the fiber grating by widening the grating interval is substantially matched to the phase matching wavelength which can be converted by the wavelength conversion element, and a wavelength converter ensuring a stable high output up to class W is provided.

Abstract: A wavelength converter structure comprises a supporting substrate, a ferroelectric substrate having at least one ridge waveguide including a plurality of periodic poled regions positioned on a first side of the ferroelectric substrate, and at least one controlling pattern positioned on a second side of the ferroelectric substrate. The ridge waveguide is joined to the supporting substrate via an adhesive, and the second side is opposite to the first side.

Abstract: An article comprising an optical fiber, the fiber comprising at least one core surrounded by a first outer cladding region, the first outer cladding region being surrounded by a second outer cladding region, the first outer cladding region in the cross-section comprising a number of first outer cladding features having a lower refractive index than any material surrounding the first outer cladding features, wherein for a plurality of said first outer cladding features, the minimum distance between two nearest neighboring first outer cladding features is smaller than 1.0 ?m or smaller than an optical wavelength of light guided through the fiber when in use; a method of its production, and use thereof.

Abstract: An apparatus includes one or more optical couplers, an optical medium, and an optical pump source. The optical medium behaves as a negative refractive index material over a frequency range. The one or more optical couplers are configured to provide first and second optical inputs to the optical medium and to provide an optical output from the optical medium. The optical pump source is coupled by one of the one or more optical couplers to deliver pump light to the optical medium.

Abstract: A wavelength conversion device that obtains, from an input light, a wavelength-converted light with a wavelength shift by a wavelength shift amount of ?? is disclosed. The device comprises first and second wavelength converters. The first wavelength convertor shifts a central wavelength of a first wavelength-converted light by a first wavelength shift amount of ??1 relative to a central wavelength of an input light. The second wavelength convertor shifts a central wavelength of a second wavelength-converted light by a second wavelength shift amount of ??2 relative to a central wavelength of the first wavelength-converted light. The first wavelength shift amount of ??1 and the second wavelength shift amount of ??2 satisfy ??1+??2=??.

Abstract: The disclosure relates to surface plasmon-polariton waveguides, which can guide ultra-long range surface plasmon-polariton waves. The attenuation of an ultra-long range surface plasmon-polariton waves is much lower than the attenuation of the conventional long range surface plasmon-polariton waves guided with the same kind of metal film or metal strip at the same plasmon-polariton frequency. An exemplary ultra-long range surface plasmon-polariton waveguide disclosed in this disclosure comprises a metal layer, such as a metal film or finite width metal strip, intermediate dielectric layers adjacent to the metal layer, and outer cladding dielectric material. The intermediate dielectric layers redistribute the electromagnetic energy distribution of the surface plasmon-polariton waves so that less of the energy propagates in the metal layer. Therefore, the attenuation of the surface plasmon-polariton wave is reduced.

Abstract: Provided is a wavelength converter capable of generating a converted signal having a wavelength different from the wavelength of input light. The wavelength converter of the present invention comprises: (1) a pump light source for outputting pump light; (2) a light multiplexing part for multiplexing the input light and the pump light and outputting thus multiplexed light; (3) and a plurality of optical fibers connected together in cascade, allowing the passage of the input light and the pump light thus multiplexed and output thereinto by the light multiplexing part, having mutually different zero dispersion wavelengths, and being capable of generating a converted signal by the nonlinear optical phenomenon occurring during the passage of the input light and the pump light. The wavelength conversion efficiency of the sidebands is less than ?20 dB relative to the maximum value of the wavelength conversion efficiency in the entirety of the plurality of optical fibers.

Abstract: This device for optically regenerating pulses includes a synchronous intensity modulator to provide time synchronization for pulses passing through it and to stabilize intensity fluctuations in the pulses. In addition, it includes noise suppression circuitry in the form of a saturable absorber that is distinct from the synchronous intensity modulator and the intensity fluctuations stabilizer.

Abstract: The present invention is directed to a wavelength conversion layer (1) with a matrix layer (2) comprising embedded rare-earth-ion-doped micro-crystallites (3) and/or rare-earth-ion-doped amorphous particles, wherein said rare-earth-ion-doped micro crystallites and/or rare-earth-ion-doped amorphous particles are doped with at least one of the lanthanides, and wherein said rare-earth-ion-doped micro-crystallites and/or said doped amorphous particles have a mean diameter d50 of 10 nm to 500 müm, and wherein the matrix layer, is transparent, whereby the refractive indices of said rare-earth-ion-doped micro-crystallites and/or said rare-earth-ion-doped amorphous particles match the refractive indices of the matrix layer with an index fifference delta n such as: 0<_delta n<_0.1, for at least one wavelength in the range of 400 nm to 1200 nm.

Abstract: An optical package includes a semiconductor laser, a wavelength conversion device and a MEMS-actuated mirror oriented on a base module to form a folded optical pathway between an output of the semiconductor laser and an input of the wavelength conversion device. An optical assembly is located in a mechanical positioning device and the mechanical positioning device is disposed on the base module along the optical pathway such that the beam of the semiconductor laser passes through the optical assembly, is reflected by the MEMS-actuated mirror back through the optical assembly and into the waveguide portion of the wavelength conversion device. The MEMS-actuated mirror is operable to scan the beam of the semiconductor laser over the input of the wavelength conversion device. The optical assembly may be adjusted along the optical pathway with the mechanical positioning device to focus the beam into the waveguide portion of the wavelength conversion device.