Abstract: A light emitting photonic crystal having an organic light emitting diode and methods of making the same are disclosed. An organic light emitting diode disposed within a photonic structure having a band-gap, or stop-band, allows the photonic structure to emit light at wavelengths occurring at the edges of the band-gap. Photonic crystal structures that provide this function may include materials having a refractive index that varies.

Abstract: A surgical laser system includes a first laser source, a second laser source, a beam combiner and a laser probe. The first laser source is configured to output a first laser pulse train comprising first laser pulses. The second laser source is configured to output a second laser pulse train comprising second laser pulses. The beam combiner is configured to combine the first and second laser pulse trains and output a combined laser pulse train comprising the first and second laser pulses. The laser probe is optically coupled to an output of the beam combiner and is configured to discharge the combined laser pulse train.

Abstract: A heat-assisted magnetic recording head includes a slider body having a waveguide that delivers light to a near-field transducer. The waveguide is optically coupled to an input coupler a of the slider body that receives the light. A laser diode is mounted on or in the slider body. The laser diode has an integral exit facet proximate the input coupler. The exit facet has a curved profile that modifies a shape of the light emitted from the exit facet into the input coupler.

Abstract: A method of testing a ribbon fiber cable is provided. The ribbon fiber cable includes optical fibers between a first end face and a second end face. End faces of the optical fibers are lined up in a single line in a line direction. The method includes: injecting light into each optical fiber at the second end face; measuring first power of the light exiting from each optical fiber at the first end face; disposing a member between the first end face and an optical sensor; injecting light into each optical fiber at the second end face; measuring second power of the light exiting from each optical fiber at the first end face; calculating a ratio of the second power to the first power; and testing an array of the optical fibers based on the ratio. Light transmittance of the member monotonically varies in the line direction.

Abstract: A laser oscillator capable of detecting scattered light intensity when a laser beam is incident on an end surface of a fiber more appropriately is provided. A laser oscillator monitoring control system includes: a scattered light detection unit that detects a scattered light intensity on an input end surface of a process fiber of a fiber laser oscillator; a control unit that controls a laser output value on the basis of a laser output command value from a CNC and a detection result obtained by the scattered light detection unit; a normal scattered light calculation unit that calculates a normal index value; a first threshold setting unit that sets a first threshold indicating an abnormality resulting from a contamination and/or a scratch; a second threshold setting unit that sets a second threshold indicating an abnormality resulting from an optical axis shift; and a third threshold setting unit that sets a third threshold indicating an abnormality of a level in which a component is destroyed.

Abstract: An optical device includes a first substrate, having first and second surfaces, and a second substrate having a third surface. The first substrate includes: a laser unit, having an active layer and emitting light into the first substrate from the active layer; a reflecting mirror, having a plane obliquely intersecting an optical axis of light emitted from the laser unit, and being formed on the first surface so as to reflect the light toward the second surface; and a convex lens, being formed in a region on the second surface, the region including an optical axis of the light reflected by the reflecting mirror. The second substrate is provided with a grating coupler and an optical waveguide on the third surface, the optical waveguide having light incident on the grating coupler propagating therethrough.

Abstract: An optical modulator is disclosed that includes an optical resonator structure. The optical resonator structure includes at least one non-linear portion, the at least one non-linear portion comprising at least one radial junction region. The at least one radial junction region is formed between at least first and second materials, respectively, having different electronic conductivity characteristics. A principal axis of the at least one radial junction region is oriented along a radius of curvature of the at least one non-linear portion. The optical modulator includes an optical waveguide that is coupled to the at least one non-linear portion of the optical resonator structure.

Abstract: The present invention provides a device and method for an integrated white colored electromagnetic radiation source using a combination of laser diode excitation sources based on gallium and nitrogen containing materials and light emitting source based on phosphor materials. In this invention a violet, blue, or other wavelength laser diode source based on gallium and nitrogen materials is closely integrated with phosphor materials, such as yellow phosphors, to form a compact, high-brightness, and highly-efficient, white light source.

Abstract: An optical system has a beam-steering device, a light source, and a controller that controls the light source to actively control wavelength of the incoming light to control the output angle of the outgoing light output from the BS device. The BS device may have incoupler, waveguide, and/or outcoupler electrodes, and the system may have corresponding controllable voltage supplies actively controlled by the controller to selectively modify electric fields applied to the BS device to control corresponding operating characteristics of the BS device (e.g., in-plane and/or out-of-plane output angles of the outgoing light and/or device incoupling angle). An alternative optical system has a BS device, a detector array that generates detector signals corresponding to outgoing light received from the BS device, and a controller that processes the detector signals to determine one or more wavelengths of the outgoing light.

Abstract: A multi-path optical amplification system includes a modulated light source emitting ?1 modulated light, a first signal splitter coupled to receive the modulated ?1 light providing a first ?1 modulated light signal and second ?1 modulated light signal. A first optical amplifier is for receiving the first ?1 modulated light signal and generating a first amplified output signal, and a second optical amplifier is for receiving the second ?1 modulated light signal and generating a second amplified output signal. A first collimator assembly is coupled to receive the first amplified output signal and provide a first output beam having a first beam divergence (D1) and a second collimator assembly is coupled to receive the second amplified output signal and provide a second output beam having a second beam divergence (D2).

Abstract: Coating-less nonplanar ring oscillator lasers are disclosed. Such lasers may eliminate the need for thin-film optical coatings from a laser cavity, solving the problem of optical damage to the coatings, and thus, providing a longer useful lifetime for the laser for space or terrestrial applications. Such lasers may be compact, ultra-stable, and highly reliable, enabling a low phase noise, single frequency laser in a compact package. Such lasers may be used in CW and/or in pulse mode.

Abstract: The present invention demonstrates a technique for achieving milli-joule level and higher energy, broad bandwidth laser pulses centered around 2.4 micrometer with a kilohertz and other repetition rate. The key to such technique is to start with a broadband micro-joule level seed laser at around 2.4 micrometer, which could be generated through difference frequency generation, four-wave mixing process and other methods. This micro-joule level seed laser could then be amplified to above one milli-joule through chirped pulse amplification in a Cr2+:ZnSe or Cr2+:ZnS crystal pumped by a commercially available Ho:YAG or other appropriate suitable lasers. Due to the high seed energy, fewer gain passes are needed to achieve a milli-joule level output thus significantly simplifies laser architectures. Furthermore, gain narrowing effect in a typical chirped pulse amplifier is also mitigated and thus enable a broadband output.

Abstract: A laser light projection apparatus is provided for projecting laser light onto the surface of a target object. The laser light projection apparatus includes a laser light source that generates laser light and a housing with a cavity therein defined by sidewalls, at least a portion of which have one or more reflective surfaces. The cavity extends along a center axis of the laser light and has a first portion at which a distance between opposing sidewalls is less than a distance between opposing sidewalls at a second portion of the cavity at a distance farther from the laser light source than the first portion. At least a portion of the laser light generated by the laser light source is reflected from the reflective surface of the sidewalls to form a two-dimensional pattern spaced apart from the center axis.

Abstract: A multimode interferometer includes: a multimode waveguide mesa having a top face extending in a direction of a first axis, a first side face and a second side face that extend in the direction of the first axis, and a first end face and a second end face that are arranged in the direction of the first axis; and a waveguide mesa connected to the first end face at a port; first and second waveguide mesas connected to first and second ports on the second end face. The multimode waveguide mesa has a first side edge line shared by the top face and the first side face, and an end line shared by the top face and the first end face. The first side edge line forms an acute angle with the end line at an outer vertex where the first side edge line and the end line meet.

Abstract: A light-emission unit includes a light-emission section, a light extraction surface that extracts light outputted from the light-emission section, and a light-condensing section that is provided on side opposite the light extraction surface, with the light-emission section provided therebetween.

Abstract: An optical element mounting package includes a substrate including a recess comprising a bottom surface on which an optical element is to be mounted, and a side wall comprising an opening. The bottom surface of the recess has a cutout adjacent to the opening.

Abstract: An illumination apparatus includes a first wavelength converter which absorbs part of the first excitation light and emits first wavelength-converted light, a second wavelength converter which absorbs part of the first excitation light and emits second wavelength-converted light, a reflector including a reflecting surface which is arranged to surround the members, and a holder which holds the members. A first region where light distribution angles of light emitted from the members have a predetermined value or less and a second region where the light distribution angle is less than the predetermined value are present in a region surrounded by the reflecting surface. The holder holds at least one part of the wavelength converter and at least one part of the second wavelength converter at the first region.

Abstract: A gallium- and nitrogen-containing laser device including a facet with surface treatment to improve an optical beam is disclosed.

Abstract: A VCSEG-DFB laser, fully compatible with MGVI design and manufacturing methodologies, for single growth monolithic integration in multi-functional PICs is presented. It comprises a laser PIN structure, in mesa form, etched from upper emitter layer top surface through the active, presumably MQW, gain region, down to the top surface of the lower emitter. Lower electrical contacts sit adjacent the mesa disposed on the lower emitter layer with upper strip contacts disposed atop the upper emitter layer on the mesa top. An SEG is defined/etched from mesa top surface, between the upper strip contacts, through upper emitter layer down to or into the SCH layers. Vertical confinement is provided by the SCH structure and the lateral profile in the bottom portion of the mesa provides lateral confinement. The guided mode interacts with the SEG by the vertical tail penetrating the SEG and evanescent field coupling to the SEG.

Abstract: An optical system has a beam-steering device having a planar waveguide region between a tapered incoupler and a tapered outcoupler that respectively define opposing incoupler and outcoupler facets of the BS device. Each region has a substrate, a subcladding layer over the substrate, a core layer over the subcladding, and a top cladding layer over the core. Within the incoupler, at least one of the subcladding and the top cladding has a material having a refractive index that varies with an applied field (e.g., an electric field) applied at the incoupler. The optical system also has a field-applying device that applies the applied field at the incoupler, an output detector that generates a feedback signal based on detected outgoing light output from the outcoupler, and a controller that controls the field-applying device based on the feedback signal to alter the light output from the outcoupler.

Abstract: An example system includes a grating coupled laser, a laser optical interposer (LOI), an optical isolator, and a light redirector. The grating coupled laser includes a laser cavity and a transmit grating optically coupled to the laser cavity. The transmit grating is configured to diffract light emitted by the laser cavity out of the grating coupled laser. The LOI includes an LOI waveguide with an input end and an output end. The optical isolator is positioned between the surface coupled edge emitting laser and the LOI. The light redirector is positioned to redirect the light, after the light passes through the optical isolator, into the LOI waveguide of the LOI.

Abstract: A diode-laser assembly having an electrically isolated diode-laser bar on a cooled base-element is disclosed. The diode-laser bar is electrically isolated from the base-element and electrically isolated from any coolant water, thereby eliminating the need for de-ionized water and mitigating corrosion due to galvanic action. Multiple such diode-laser assemblies are stackable, with small bar-to-bar pitch, enabling a high-current and high-brightness diode-laser stack.

Abstract: A fiber optic sensor may be provided comprising an optical waveguide having at least one first core and a cladding surrounding the first core, wherein the first core extends substantially over the entire length of the optical waveguide and at least one Bragg grating is introduced into the first core, wherein the Bragg grating has an elongated cross section, wherein the short semi-axis is smaller than the diameter of the first core and the center of gravity of the cross section of the at least one Bragg grating lies on the axis of symmetry of the optical waveguide. A method may be provided for determining torsion with such a sensor. A method for the production of such a sensor may be provided.

Abstract: A hybrid single or multi-wavelength laser using an optical gain element, such as a semiconductor optical amplifier (SOA), for example a QD RSOA, and a semiconductor, e.g. silicon, photonics chip is demonstrated. A plurality, e.g. four, lasing modes at a predetermined, e.g. 2 nm, spacing and less than 3 dB power non-uniformity may be observed, with over 20 mW of total output power. Each lasing peak can be successfully modulated at 10 Gb/s. At 10?9 BER, the receiver power penalty is less than 2.6 dB compared to a conventional commercial laser. An expected application is the provision of a comb laser source for WDM transmission in optical interconnection systems.

Abstract: In a laser device and a photoacoustic measurement device including the laser device, the intensity of light at each wavelength made independently controllable. The laser device includes a laser medium which has oscillation wavelengths at a first wavelength and a second wavelength with higher light emission efficiency than at the first wavelength, an excitation section, a first resonator, a second resonator, a Q-value change unit, and a control section. The control section oscillates light having the first wavelength through Q switching when a first delay time has elapsed after the excitation of the laser medium has been started in a case where the oscillation wavelength is the first wavelength, and oscillates light having the second wavelength through Q switching when a second delay time has elapsed after the excitation of the laser medium has been started in a case where the oscillation wavelength is the second wavelength.

Abstract: A semiconductor laser includes a main body and a ridge structure arranged on the main body, the ridge structure being oriented along a longitudinal axis above an active zone, wherein the ridge structure has a first width, the ridge structure has two opposite end faces along the longitudinal axis, adjacent to at least one end face, the ridge structure has an end section arranged on one side with respect to a center axis of the ridge structure such that the ridge structure is widened on one side adjacent to the end face, and on an opposite side of the ridge structure relative to the end section a fracture trench is arranged adjacent to the end face and at a distance from the ridge structure in a surface of the main body.

Abstract: A gallium- and nitrogen-containing laser device including an etched facet with surface treatment to improve an optical beam is disclosed.

Abstract: An edge-emitting semiconductor laser includes: a semiconductor substrate; a first cladding layer having a first refractive index and formed on the semiconductor substrate; an active layer formed on the first cladding layer and having a second refractive index higher than the first refractive index; a Bragg reflector formed on the active layer and in which low-refractive-index layers and high-refractive-index layers each having a thickness larger than ?/4n are alternately laid one on another where ? is an lasing wavelength and n is a refractive index of a medium; a light absorption layer formed on the Bragg reflector and having bandgap energy lower than that of the active layer; and a second cladding layer formed on the light absorption layer and having a third refractive index lower than the second refractive index.

Abstract: An optical system for the generation of a structured light field comprises an array of light sources and a structuring unit separate from said array of light sources, said structuring unit being refractive or reflective and transforming the output of that array of light sources into a structured light illumination by collimating the light beam of each individual light source and directing each beam into the scene under vertical and horizontal angles that can be arbitrarily chosen by refraction or reflection.

Abstract: An incoherent beam combination based high energy nanosecond pulsed fiber laser includes a nanosecond pulsed seed, a fiber splitter, fiber amplifiers, synchronization fibers, a fiber laser combiner and a laser output head. The output fiber of the pulsed seed is fusion spliced to the input fiber of the splitter; the output fibers of the splitter are fusion spliced to the fiber amplifiers separately; synchronization fibers are fusion spliced between the amplifiers and the input fibers of the fiber laser combiner. The nanosecond pulsed seed is split by the fiber splitter and amplified in the later fiber amplifiers; synchronization fibers make sure the optical time-domain synchronization; the fiber laser combiner allows for the incoherent combination of high energy pulsed laser.

Abstract: The invention relates to an optical interference filter device which defines a first periodic filter frequency response between a first filter output port and a filter input port and a second periodic filter frequency response having the same free spectral range as the first periodic frequency response between a second filter output port and the filter input port. The first and second periodic filter frequency responses are shifted versus each other by a predetermined optical frequency distance.

Abstract: A laser system for use in an environment is disclosed. The laser system may include a base unit including a laser, a controller operatively coupled to the laser, and a first antenna operatively coupled to the controller. The laser system may further include a laser energy delivery system having a first end which receives laser energy from the laser and a second end which delivers the laser energy to the environment. The laser system may further include a switch unit located remote from the base unit and including a switch controller, a second antenna operatively coupled to the switch controller, and a user operable switch. The switch unit may be connected to the base unit through a tether. The controller may determine when the laser energy is provided to the laser energy delivery system based on a signal from the switch unit, the signal being sent wirelessly to the controller from the second antenna of the switch unit to the first antenna of the base unit.

Abstract: A laser including a solid state laser gain medium having a D-shaped cross section and an unstable resonator laser cavity including the solid state laser gain medium configured with a geometric magnification in a range of 1 to 5 under the intended operating conditions, including the effects of thermal lensing in the gain medium. An optical switching device in the unstable resonator laser cavity generates a pulse duration in the range of 0.05 to 100 nanoseconds. A diode-pump source is configured to inject pump light through the curved or barrel surface of the D-shaped gain medium.

Abstract: A laser oscillation device can prevent a laser medium-circulating pipe from expanding. The laser oscillation device includes a resonator part, which has an introduction port, through which a laser medium is introduced, and a discharge port, from which the laser medium is discharged, and which generates a laser beam, a laser medium-circulating pipe having one end connected to the introduction port, and the other end connected to the discharge port, a blower arranged in the laser medium-circulating pipe, to circulate the laser medium so that the laser medium is introduced from the introduction port to the resonator part, and the laser medium introduced to the resonator part is discharged from the discharge port, and a heat-insulating mechanism which is provided in the laser medium-circulating pipe, to block heat conduction between the laser medium flowing through the laser medium-circulating pipe and the laser medium-circulating pipe.

Abstract: A narrow band laser apparatus may include: a laser resonator; a pair of discharge electrodes; a power supply; a first wavelength measurement device configured to output a first measurement result; a second wavelength measurement device configured to output a second measurement result; and a control unit. The control unit calibrates the first measurement result, based on a difference between the second measurement result derived when the control unit controls the power supply to apply a pulsed voltage to the pair of discharge electrodes with a first repetition frequency and the second measurement result derived when the control unit controls the power supply to apply the pulsed voltage to the pair of discharge electrodes with a second repetition frequency, the second repetition frequency being higher than the first repetition frequency.

Abstract: A laser structure includes a substrate and a first dielectric layer formed on the substrate. A multi-quantum well is formed on the first dielectric layer and has a plurality of alternating layers. The alternating layers include a dielectric layer having a sub-wavelength thickness and a monolayer of a two dimensional material.

Abstract: An intracavity laser absorption infrared spectroscopy system for detecting trace analytes in vapor samples. The system uses a spectrometer in communications with control electronics, wherein the control electronics contain an analyte database that contains absorption profiles for each analyte the system is used to detect. The system can not only detect the presence of specific analytes, but identify them as well. The spectrometer uses a hollow cavity waveguide that creates a continuous loop inside of the device, thus creating a large path length and eliminating the need to mechanically adjust the path length to achieve a high Q-factor. In a preferred embodiment, the laser source may serve as the detector, thus eliminating the need for a separate detector.

Abstract: Embodiments include a silicon photonic chip having a substrate, an optical waveguide on a surface of the substrate and a cavity. The cavity includes an electro-optical component, configured for emitting light perpendicular to said surface and a lens element arranged on top of the electro-optical component. The lens is configured for collimating light emitted by the electro-optical component. The chip also includes a deflector arranged on top of the lens element and configured for deflecting light collimated through the latter toward the optical waveguide. The lens element includes electrical conductors connected to the electro-optical component. The electrical conductors of the lens element may for instance include one or more through vias, one or more bottom electrical lines on a bottom side of the lens element (facing the electro-optical component), and at least one top electrical line.

Abstract: The invention generally relates to an optical coherence tomography system that is reconfigurable between two different imaging modes and methods of use thereof.

Abstract: In a resonator arrangement (1) including a resonator (2), an interferometer (9) is arranged inside the resonator (2) and includes at least a first and a second interferometer leg (9a, 9b). The two interferometer legs (9a, 9b) have optical path lengths (L1, L2) that differ from each other. According to the invention a splitting ratio is variably adjustable, with which the interferometer (9) splits radiation (8) circulating in the resonator (2) into the first and second interferometer legs (9a, 9b).

Abstract: Optical microresonator platforms are provided comprising a substrate having a surface, a plurality of SiO2 pillars, and a plurality of SiO2 whispering gallery mode (WGM) optical microresonators, each SiO2 pillar extending from the surface of the substrate and terminating in a corresponding SiO2 WGM optical microresonator of the plurality of SiO2 WGM optical microresonators, wherein the substrate, the plurality of SiO2 pillars and the plurality of SiO2 WGM optical microresonators form a monolithic structure, and further wherein the substrate is substantially transparent to visible light. The substrate may be a SiO2 substrate and the SiO2 WGM optical microresonator may be a SiO2 optical microtoroid.

Abstract: An optical waveguide module includes an optical waveguide sheet including multiple optical waveguides, and a light-emitting device and a light-receiving device each positioned over a surface of the optical waveguide sheet. At least one of the optical waveguides includes a first mirror, a second mirror, and a slit. The first mirror is configured to reflect light entering the corresponding optical waveguide from its first end to the light-receiving device or to reflect light emitted from the light-emitting device toward the first end of the corresponding optical waveguide. The second mirror is configured to reflect light entering the corresponding optical waveguide from its second end toward the surface of the optical waveguide sheet. The slit is provided between the second mirror and the second end of the corresponding optical waveguide. The corresponding optical waveguide is discontinuous across the slit.

Abstract: A semiconductor waveguide optical device and a method of manufacturing of a semiconductor optical device are disclosed. The semiconductor waveguide optical device may include a gradient index waveguide for mode conversion and/or vertical translation of optical modes of step-index waveguides, which may be disposed on or over a same substrate as the gradient index waveguide. The gradient index waveguide may be epitaxially grown.

Abstract: A light emitting diode includes: a substrate of front and back main surfaces; a V-shaped groove, which has a reflecting surface, formed over front surface of the conductive substrate; a light-emitting epitaxial layer, the margin of which has its vertical projection between the bottom and the inner margin of the V-shaped groove, formed over the substrate, so that light emitted from the light-emitting epitaxial layer margin is incident to the mirror surface of the V-shaped groove and emits outwards. This structure can effectively improve extraction efficiency of device and control path of light at peripheral region of the light-emitting epitaxial layer.

Abstract: The optical transmitter includes a FP-LD, generating multiple-longitudinal mode light wave. The FP-LD is also driven by an electrical signal, modulates the electrical signal to the multiple-longitudinal mode light wave, and outputts the modulated multiple-longitudinal mode light wave. An optical coupler, coupled with the FP-LD, is used for feeding the modulated multiple-longitudinal mode light wave from the FP-LD to a fiber Bragg grating. The fiber Bragg grating is for filtering the received multiple-longitudinal mode light wave according to a parameter, and feeding back the optical signal generated after being filtered to the optical coupler. The optical coupler divides the optical signal, thus making the optical signal oscillate between the FP-LD and the fiber Bragg grating to form a oscillation cavity, and outputs a single mode optical wave with constant wavelength and power.

Abstract: A lighting and/or signaling unit comprising a pair of light sources both cooperating with an optical element in such a way as to form two output light beams, depending on the desired lighting function. The output diopter, notably formed by elliptical portions, is adapted to accommodate the generation of beams from two sources spaced apart. Applicable to the motor vehicle industry.

Abstract: Disclosed is a high power ultra-short pulsed laser device increasing pulse energy by using resonators. A pulsed laser device may comprise a first resonator making a pump beam resonate primarily and passing the pump beam which resonated through a first output mirror; and a second resonator comprising a first multiple reflection mirror and a second multiple reflection mirror. Also, the first multiple reflection mirror includes at least one first small area mirror, and the second multiple reflection mirror includes at least one second small area mirror, and the second resonator makes the laser beam delivered from the first resonator resonate by reflecting the laser beam repetitively. Therefore, the pulsed laser device may increase pulse energy without using a multi-stage amplifier so that a high power ultra-short pulsed laser beam can be generated.

Abstract: An illuminator comprising a short-wave infrared (SWIR) laser, a fiber optic, and a lens optic. The fiber optic is coupled to the SWIR laser for mixing the modes of a beam emitted by the SWIR laser. The lens optic is coupled to the fiber optic for shaping the beam into a top-hat beam profile. A method for creating SWIR illumination includes emitting a laser beam with multiple modes from a SWIR laser, transmitting the laser beam through a multi-mode fiber optic, and transmitting the laser beam through a lens optic. Transmitting the laser beam through the multi-mode fiber optic can including mixing modes of the laser beam thereby reducing speckle and constructive and destructive interference in the laser beam. Transmitting the laser beam through the lens optic can include generating a top-hat beam profile.

Abstract: Disclosed is an ASE-free continuously tunable external resonator laser in which reduction in tuning range and decrease in output are suppressed. The external resonator laser comprises: a fixed support body which has a half mirror that partially reflects incident light and partially transmits incident light fixed therein; and a rotatory support body which is rotatably supported by the fixed support body by way of a shaft, and which has a laser chip that emits light, a collimator lens that collimates light emitted from the laser chip, and a diffraction grating that diffracts light emitted from the laser chip, fixed therein.

Abstract: A fiber coupled semiconductor device and a method of manufacturing of such a device are disclosed. The method provides an improved stability of optical coupling during assembly of the device, whereby a higher optical power levels and higher overall efficiency of the fiber coupled device can be achieved. The improvement is achieved by attaching the optical fiber to a vertical mounting surface of a fiber mount. The platform holding the semiconductor chip and the optical fiber can be mounted onto a spacer mounted on a base. The spacer has an area smaller than the area of the platform, for mechanical decoupling of thermally induced deformation of the base from a deformation of the platform of the semiconductor device. Optionally, attaching the fiber mount to a submount of the semiconductor chip further improves thermal stability of the packaged device.