180results about "Semiconductor laser optical device" patented technology

A coherent optical injection locking (COIL) apparatus generates multiple optical source outputs from a single optical source generated by a parent laser. The COIL apparatus includes a plurality of optical source generators each having a child laser, of lesser performance than the parent laser, that is injection locked to the single optical source. The optical source generators may have one or both of a shared configuration and a cascaded configuration that replicates the single optical source, or a single wavelength of the single optical source when it is a comb source.

The invention discloses a beat frequency comparison device mediated by an optical frequency comb. The beat frequency comparison device comprises the optical frequency comb, a first frequency stabilized laser, a first beat frequency device, a first frequency mixer, a first high-pass filter, a second frequency stabilized laser, a second beat frequency device, a second frequency mixer, a second high-pass filter, a DDS signal generator, a third frequency mixer and a low-pass filter. Frequency-stabilized lasers output by the first frequency-stabilized laser and the second frequency-stabilized laser and an optical frequency comb output by the optical frequency comb are subjected to beat frequency in the first beat frequency device and the second beat frequency device respectively, and first beat frequency and second beat frequency are obtained; the first beat frequency and the second beat frequency are mixed with the carrier envelope offset frequency of the optical frequency comb, and a first sum frequency and a second sum frequency are filtered out; the first sum frequency obtains a synthetic frequency through direct digital frequency synthesis; the second sum frequency and the synthetic frequency are mixed in the third mixer, and then the difference frequency is filtered out through the low-pass filter. According to the invention, beat frequency comparison of frequency-stabilized lasers with different wavelengths can be realized, and the influence of the stability of the optical frequency comb is avoided.

The invention provides a high-power external cavity tunable quantum cascade laser output module. The high-power external cavity tunable quantum cascade laser output module comprises a first lens, a first half-wave plate and a first mid-infrared grid polaroid which are sequentially arranged along a light path of a first laser; a second lens, a second half-wave plate, a second mid-infrared grid polarizer and a third half-wave plate are sequentially arranged along the light path of the second laser; emergent light of the first mid-infrared grid polaroid and the third half-wave plate is converged on different surfaces of the third mid-infrared grid polaroid, the first blazed grating is arranged on a reflection light path of the first mid-infrared grid polaroid, and the second blazed grating is arranged on a reflection light path of the second mid-infrared grid polaroid. According to the invention, the problems of wavelength locking and low polarization beam combination efficiency caused by insufficient polarization state of the quantum cascade laser can be effectively solved, narrow linewidth output and wavelength tuning of the quantum cascade laser can be realized, and even high-power dual-wavelength tunable output can be realized through polarization beam combination structure expansion.

A frequency sweep control method and apparatus are provided. The method includes: outputting a first optical signal of a first laser unit, where a first frequency sweep range of the first optical signal is determined based on a first reference light emitting frequency and a first frequency variation upper limit; and switching to output a second optical signal of a second laser unit when a first frequency variation of the first optical signal is greater than or equal to a first threshold, where a second frequency sweep range of the second optical signal is determined based on a second reference light emitting frequency and a second frequency variation upper limit, and the first threshold is less than the first frequency variation upper limit.

An optical apparatus includes: a base; a light emitting element arranged on the base and configured to output laser light; a plurality of optical components arranged on the base and configured to guide the laser light output from the light emitting element to an optical fiber, and couple the laser light with the optical fiber; and a shielding unit arranged on the base and configured to block stray light deviated from a predetermined optical path in a first optical component as the optical component and traveling to a second optical component as the optical component, and reflect the stray light in a direction deviating from the first optical component.

A line-field optical coherence tomography (OCT) system and an absorbance spectroscopy system are provided that use a tunable or swept laser architecture in a cat's eye configuration with a tilt-tuned thin-film interference filter, preferably a transmissive tilt-tuned thin-film interference filter. [Solution] The optical coherence tomography system 200 of the present invention comprises a tunable laser 100 including a gain chip 110, a collimating lens 118 that collimates light from the gain chip 110, an end reflector 122, a focusing lens 120 that focuses the collimated light 124 onto the end reflector 122, a thin-film bandpass filter 130 between the collimating lens 118 and the focusing lens 120, and at least one angle control actuator 132 that changes the angle of the thin-film filter 130 relative to the collimated light 124, an interferometer having a reference arm 212 and a measurement arm 214 that receives light from the laser 100, and a sensor 230 that detects an interference signal between the light from the reference arm 212 and the light from the measurement arm 214.

A light emitter includes: a substrate; a driving section provided on the substrate; a light source that is provided on the substrate and is driven by the driving section; a cover section through which light emitted from the light source is transmitted and that is disposed in an optical axial direction of the light source; and a support section that is provided on a part of the substrate excluding a part between the driving section and the light source and supports the cover section.

This laser module (1) comprises a semiconductor laser (11) that oscillates using one circularly polarized light among right circularly polarized light and left circularly polarized light, and a quarter wavelength plate (15) that is disposed on the emission surface side of the semiconductor laser, wherein the semiconductor laser is driven by current that is higher than the threshold current of the one circularly polarized light and is lower than the threshold current of the other circularly polarized light. The semiconductor laser is provided with an n-type cladding layer, an active layer, and a p-type cladding layer. The semiconductor laser is further provided with an n-type electrode and a p-type electrode, and at least one among the n-type electrode and the p-type electrode is a ferromagnet electrode.　As a result, the present invention can provide a low-cost laser module that is capable of limiting the impact of optical feedback.

This invention relates to a high-power narrow-linewidth laser with weak feedback in an external cavity, comprising: a sub-source output section for outputting a sub-source; a laser output section for outputting narrow-linewidth laser light; an isolator disposed between the sub-source output section and the laser output section; a multilayer reflective film assembly deposited on the input end of the isolator or on the output end of the sub-source output section for filtering the sub-source to form transmitted light and feedback light; the rear end of the isolator outputs the transmitted light to the laser output section as narrow-linewidth laser output; the sub-source output section also receives the feedback light to achieve self-injection locking, possessing the advantages of high-power narrow-linewidth laser output, simple structure, low cost, simple process, relatively small packaging size, and ease of laser packaging.

In some implementations, an optical device (e.g., a monolithic master oscillator power amplifier (MOPA) diode) may include a first facet, one or more gratings, an amplifier structure terminated with a second facet, and an oscillator array that includes multiple singlemode oscillators coupled to the first facet and to the one or more gratings. In some implementations, the multiple singlemode oscillators may be configured to generate multiple seed beams and to transmit the multiple seed beams into the amplifier structure through the one or more gratings.

A laser assembly is provided. The laser assembly includes a printed circuit board; a laser sub-assembly including a thermo-electric cooler and an optical train, wherein the laser sub-assembly is configured to connect to the printed circuit board such that the optical train is disposed between the printed circuit board and the thermo-electric cooler, wherein the thermo-electric cooler is configured to extract heat from the optical train outwardly from the printed circuit board, and wherein the laser assembly is configured to connect optically with a photonic integrated circuit via free space. Advantageously, the laser assembly includes a top-down approach where the thermo-electric cooler radiates heat outward, supports a pre-assembled approach, and uses free space connectivity for the laser path to the photonic integrated circuit, i.e., no fiber connections.

The invention may be embodied in other forms than those specifically disclosed herein without departing from itMulti-kW-class blue (400-495 nm) fiber-delivered lasers and module configurations. In embodiments, the lasers propagate laser beams having beam parameter products of <5 mm*mrad, which are used in materials processing, welding and pumping a Raman laser. In an embodiment the laser system is an integration of fiber-coupled modules, which are in turn made up of submodules. An embodiment has sub-modules having a plurality of lensed blue semiconductor gain chips with low reflectivity front facets. These are locked in wavelength with a wavelength spread of <1 nm by using volume Bragg gratings in an external cavity configuration. An embodiment has modules having of a plurality of submodules, which are combined through wavelength multiplexing with a bandwidth of <10 nm, followed by polarization beam combining. The output of each module is fiber-coupled into a low NA fiber. In an embodiment a kW-level blue laser system is realized by fiber bundling and combining multiple modules into a single output fiber.

An apparatus for providing a modulated light beam, the apparatus comprising at least a first light source (102) configured to provide a first light beam and a modulating system (104) configured to provide a first modulation to the first light beam comprising a first amplitude modulation and a first frequency modulation, and provide a second modulation to the first light beam comprising a second amplitude modulation and a second frequency modulation, wherein the modulating system provides the first modulation by providing a first control signal and provides the second modulation by providing a second control signal, wherein the first control signal and the second control signal comprise a selected amplitude ratio and selected phase difference, such that the first light beam is modulated by a target modulation to a first modulated light beam, wherein the target modulation comprises a target frequency modulation and target amplitude modulation, wherein the modulating system comprises at least a reference clock (106) for providing a clock signal and a driving unit (108) configured to obtain the clock signal, wherein the driving unit is configured to provide the first control signal and the second control signal based on at least the obtained clock signal.

A line field optical coherence tomography (OCT) system and an absorption spectrometer system employing a tunable or swept laser architecture. The laser is a cat's-eye configuration with a preferably transmissive tilt tuned interference thin film filter.

An acousto-optic system may include a laser source, and an AOM coupled to the laser source and having an acousto-optic medium and transducer electrodes carried by the medium. The acousto-optic system may also include an interface board with a dielectric layer and signal contacts carried by the dielectric layer, and connections coupling respective signal contacts with respective transducer electrodes. Each connection may include a dielectric protrusion extending from the AOM, and an electrically conductive layer on the dielectric protrusion for coupling a respective transducer electrode to a respective signal contact.

A laser assembly (12) of a system (10) includes a first emitter assembly (30a), a second emitter assembly (30b), and a combiner lens (34). The first emitter assembly (30a) generates a first emitter beam (22a) that is directed along a first emitter axis (32a) at a beam intersection area (31). The second emitter assembly (30b) generates a second emitter beam (22b) that is directed along a second emitter axis (32b) at the beam intersection area (31). The combiner lens (34) receives and spatially combines the first emitter beam (22a) and the second emitter beam (22b) after the emitter beams (22a) (22b) have intersected at and passed through the beam intersection area (31). The laser assembly (12) includes a laser frame (18); an emitter array (20) that generates a plurality of emitter beams (22); a combiner lens assembly (24) that transforms and combines the plurality of emitter beams (22) into the assembly output beam (14); and a system controller (26) that controls the operation of the laser assembly (12). The combiner lens assembly (24) including combiner lenses (34, 36, 38) has a fast axis, front side focal point (24a), and a fast axis and slow axis, rear side focal point (24b). It is positioned so that its fast axis front side focal point (24a) is approximately at the beam intersection area (31). The optical fiber (16) is positioned so that its inlet facet (16A) is approximately at the fast axis and slow axis, rear side focal point (24b).

A LIDAR system includes a plurality of lasers that generate beams having FOVs. A plurality of detectors are positioned at a location where a FOV of at least one of the plurality of beams generated by the plurality of lasers overlaps a FOV of at least two of the plurality of detectors. A lens system collimates and projects the beams generated by the plurality of lasers. An actuator is coupled to at least one of the plurality of lasers and the lens system to cause relative motion between the plurality of lasers and the lens system in a direction orthogonal to an optical axis of the lens system in order to cause relative motion between the FOVs of the beams generated by the plurality of lasers and the FOVs of the detectors.

To provide a light emitting device capable of emitting light from a plurality of light emitting elements with different polarization directions from each other by aligning their polarization directions.SOLUTION: A light emitting device has a base having a bottom, a first semiconductor laser element located at the bottom of the base, a second semiconductor laser element located at the bottom of the base with a different polarization direction from that of the first semiconductor laser element, a lens member into which light emitted from the first and second semiconductor laser elements enters, and a wavelength plate arranged on the lens member to change the polarization direction of the first semiconductor laser element.SELECTED DRAWING: Figure 1

Collimating superlenses and their design methods, and collimation systems based on collimating superlenses, are disclosed. The collimation system includes a VCSEL array and a collimating superlens array. The VCSEL array comprises several VCSEL units; the collimating superlens array comprises several collimating superlenses, which are arranged in a one-to-one correspondence with the VCSEL units to collimate the emitted beams of the VCSEL units. The collimating superlenses are composed of amorphous silicon cylinders of different radii, the radius of each amorphous silicon cylinder being determined according to the position and phase of each position of the collimating superlens, so that the amorphous silicon cylinders of different radii are arranged according to the position and phase distribution of the collimating superlenses. By employing a collimating superlens design method with a specific phase distribution, the limitations of traditional curvature radius processing are overcome. The arrangement of amorphous silicon cylinders with specific radius dimensions replaces the curved surface distribution of traditional optical convex lenses, and collimation performance is improved based on high-precision micro / nano fabrication technology.

The present disclosure relates to methods for large scale production of electronic devices and the resulting electronic devices. A method for manufacturing an electronic device includes attaching a protective grid to a first substrate, where the grid includes a set of patterns each associated with a device. The walls are molded on the first substrate to form at least one peripheral set of walls of the device. Comprising a first substrate, a grid, and a wall is attached to a second substrate. An assembly formed by the aggregate structure and the second substrate is cut into individual devices according to the peripheral wall. When the grid is attached to the first substrate, an electrical contact is established between each pattern and an element of the first substrate. Attaching the aggregate structure to the second substrate includes establishing an electrical contact between each pattern and an element of the second substrate.

A system includes at least one laser configured to produce laser light and an optical element configured to produce shaped light responsive to receiving the laser light. The system also includes an optical phase modulator (OPM) optically coupled to the optical element, the OPM configured to modulate the shaped light to produce modulated light, where the optical element is configured to reduce a point spread function of the modulated light in a far field.

According to one embodiment, a sensing system includes a reflective optical element, and an optical device. The reflective optical element includes a plurality of optical structures arranged along a first plane. The optical device includes an element face. The optical device is configured to perform a first operation and a second operation. The optical device is configured to emit infrared rays from the element face in the first operation. The optical device is configured to detect the infrared rays reflected by the reflective optical element and incident on the element face in the second operation.

Laser system (200), comprising: a case (260); a laser light source in the housing (260); an optical device (220) which is attached to the housing (260) and is designed to allow laser light emitted from the laser light source to pass through the optical device (220); at least one conductive element (230) formed on at least one part of the optical device (220); a first sensor element (240) and a second sensor element (245) in the housing (260); and a measuring circuit (250) which is electrically coupled to the first sensor element (240) and the second sensor element (245) and is designed to measure a characteristic parameter which is indicative of a field between the at least one conductive element (230) and the first sensor element (240) and the second sensor element (245).

A pulse control device and laser processing system including the same are applicable for a plurality of seed laser drivers. The pulse control device includes a plurality of pulse generation circuits and a pulse delay adjustment circuit. The pulse generation circuits are configured to generate a plurality of pulse signals according to a plurality of pulse setting data, respectively, and each of the plurality of pulse setting data at least includes a pulse frequency. The pulse delay adjustment circuit is connected to the pulse generation circuits and configured to control an interval time between the pulse signals according to a reference signal, and outputs a plurality of adjusted pulse signals to the seed laser drivers, respectively. The reference signal is one of pulse signals or a standard signal, and duration corresponding to the pulse frequency in each of the plurality of pulse setting data is different from the interval time.

A tunable or swept laser architecture that is appropriate for swept source optical coherence tomography and other applications including spectroscopy employing a cat's-eye configuration with a preferably transmissive tilt tuned interference thin film filter.

Optical devices can be configured for use in quantum random number generation. [Solution] The optical device may include a light source configured to emit a light beam, a photodetector configured to detect light, and a polarizer positioned between the light source and the photodetector, wherein the polarizer is configured to selectively pass light having a specific polarization. The optical device may include a package comprising at least the light source, the photodetector, and the polarizer. The polarizer is configured to selectively pass a light beam when it has a polarization that matches a specific polarization. The optical device includes one or more mitigation functions for mitigating optical feedback to the light source. The optical device is configured for use in facilitating or enabling quantum random number generation (QRNG) based on the detection of a light beam by the photodetector.

An optical device may be configured for quantum random number generation. The optical device may include: a light source configured to emit a light beam; a photodetector configured to detect light; and a polarizer disposed between the light source and the photodetector, in which the polarizer is configured to selectively pass light having a specific polarization. The optical device may include a package including at least a light source, a photodetector, and a polarizer. The polarizer is configured to selectively pass the light beam when the light beam has a polarization that matches a particular polarization. The optical device includes one or more mitigation features for mitigating light feedback entering the light source. The optical device is configured to facilitate or implement quantum random number generation (QRNG) based on detection of the light beam by the photodetector.

A first circuit sends electrical data. The electrical data is sent to a vertical-cavity surface-emitting laser (VCSEL). A wavelength of the VCSEL is modulated. The modulating includes emitting, by the VCSEL, a wavelength-modulated beam (WMB). The WMB is based on the electrical data that was sent. The modulating can be based on injecting current into the VCSEL. The modulating can be based on VCSEL chirp. The WMB is coupled optically to an optical medium. The optical medium comprises a waveguide or a fiberoptic cable. The coupling optically is accomplished using a grating coupler, a mirror, or an off-axis diffractive lens. The optical medium is further coupled to a wavelength-dependent optical element (WDOE). The WDOE decodes the WMB into the electrical data that was sent. The electrical data is delivered to a second circuit.

A spectral beam combining device (10) for a grating external-cavity semiconductor laser, said device comprising: a plurality of laser emitting units (11); a first optical path processing unit (12), configured to convert a plurality of laser beams correspondingly outputted by the plurality of laser emitting units (11) into a plurality of first collimated beams (L1) arranged in a first direction (Z), the first direction (Z) being perpendicular to a propagation direction of the first collimated beams (L1); a second optical path processing unit (13), configured to convert the plurality of first collimated beams (L1) into a plurality of second collimated beams (L2) arranged in a second direction (Y), a propagation direction of the second collimated beams (L2) being perpendicular to the propagation direction of the first collimated beams (L1), and the second direction (Y) being perpendicular to the first direction (Z) and the propagation direction of the second collimated beams (L2); and a spectral beam combining unit (14), configured to perform spectral beam combining on the plurality of second collimated beams (L2) using the second direction (Y) as a spectral beam combining direction and to output same, thereby achieving spectral beam combining with high efficiency and high beam quality, enabling the optical axis of a beam combining optical system to be coplanar with the optical axis of a light source, and simplifying assembly and adjustment of the system structure.

A laser assembly (10) that generates an output beam (12) includes a laser source (40) that emits a source beam (40a), and a PIC module (33) that receives the source beam (40a) and processes the source beam (40a) to provide the output beam (12). The laser assembly (10) can include a laser frame (14) that encircles the laser source (40) and the PIC module (33). The laser frame (14) provides a controlled environment around these components. The PIC module (33) can include a light modulation assembly that selectively modulates the source beam (40) to generate the output beam (12). The light modulation assembly can modulate at least one of (or both) phase and amplitude of the output beam (12).