19results about "Semiconductor laser optical device" patented technology

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.

Provided are a direction-dependent element, a substrate having a mounting surface with a plurality of grooves arranged in parallel in a region set to be biased to one side in a certain direction in an arrangement range of the direction-dependent element, and an adhesive that contains spacer particles to define an interval between objects to be bonded and bonds the direction-dependent element to the substrate. The spacer particles enter the plurality of grooves in the region, and an inclination angle is provided between the direction-dependent element and the mounting surface.

An optically pumped solid state laser (OPSL) module is disclosed. A submount unit is provided having raised wedged portion(s) to accommodate at least one gallium and nitrogen (GaN) containing pump laser diode. The at least one GaN pump laser diode is mounted on a wedge such that the light emission points at a downward angle, through beam shaping optics, and onto a GaN gain chip that is placed on a centerpiece platform representing a space between the lower portion of the one or more wedged portion(s). The gain chip is made of a series of spacer and active regions, all epitaxially formed, so that upon pumping from the pump laser diode(s), there is photonic emission from the gain chip. The gain chip spacer and active regions are selected based upon the desired wavelength output. Each active region may be spaced apart based on a half-wavelength metric.

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.

Title: Enhanced Stability Optical Fiber Resonator The invention relates to an optical resonator (1) comprising a laser source (100) emitting a main laser beam (P) and a multiplexing module (200) configured to spatially separate a portion of the main laser beam (P), referred to as the stabilizing laser beam (S), from the remaining beam. The resonator includes a resonance cavity (300) configured to cause interference between each beam (P, S), thereby generating a modulated main laser beam (P*) and a modulated stabilizing laser beam (S*). A stabilization module (400) reduces the difference between a frequency of the stabilizing laser beam and a frequency of the modulated stabilizing laser beam. The main laser beam and the stabilizing laser beam propagate, at least within the resonance cavity, in an optical fiber using spatial multiplexing.Figure for the abridged version: Fig.1A.

The invention relates to a VCSEL (10) for emitting laser light (17), having a resonator which comprises an out-coupling mirror (44) with an emission region (40) on the outer surface thereof, wherein a direction-selective optical element (46) is arranged on the emission region (40) such that most of the laser light (17) of a first direction (1) can exit the optical element (46), and most of the laser light (17) of a second direction (2) is reflected at the outer boundary surface (48) of the optical element (17). The invention also relates to an arrangement having the VCSEL (10), wherein the laser light (17) exiting the optical element (46) is in-coupled into a light guide element (12).

To provide a suitable single-element dot pattern projector. [Solution] Disclosed herein is a single-element dot pattern projector with a meta-optical system. The projector includes a laser light source and a meta-surface chip integrated on the laser light source. The meta-surface chip includes a meta-surface element spaced apart from the laser light source at a distance equal to the collimating focal length of the meta-surface chip. The laser light source generates light that is diffracted through the meta-surface element to produce a dot pattern. The projector enabled by the meta-optical system is connected to a unique method of integrating the meta-optical system and to unique functionality that can be added to the dot pattern.

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.

A laser device (110) comprises laser light sources (1) with light emission points (1a) from which laser beams (r) are emitted, an optical element (E), a transmission grating (5), and an output coupler (6). The transmission grating (5) is arranged at a polymerization position (S) where the laser beams (r) emitted by the plurality of laser light sources (1) overlap, parallel to a direction perpendicular to a plane. A first gap (7) is formed between two adjacent laser light sources (1) of the plurality of laser light sources (1), the first gap (7) being located on a path of the reflected first-order diffracted light (r2) to be emitted by the transmission grating (5). A first angle (θ1) formed by a virtual line (C1) and a virtual line (C2) is equal to or greater than 0.15 degrees.The virtual line (C1) connects the polymerization position (S) with a light emission point (1b) that is closest to the first gap (7) and located on the side of the first gap (7). The virtual line (C2) connects the polymerization position (S) with a light emission point (1c) that is closest to the first gap (7) and located on the other side of the first gap (7).

Techniques for efficient alignment of a semiconductor laser in a Photonic Integrated Circuit (PIC) are disclosed. In some embodiments, a photonic integrated circuit (PIC) may include a semiconductor laser that includes a laser mating surface, and a substrate that includes a substrate mating surface. A shape of the laser mating surface and a shape of the substrate mating surface may be configured to align the semiconductor laser with the substrate in three dimensions.

A communication module includes a laser driving unit (LDU) and one or more multifunction illumination units. The one or more multifunction illumination units are be coupled to the LDU with an electrical connection and configured to transmit both electrical power and data.

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.

The embodiment of the application discloses a spatial beam combining method of a semiconductor laser module, comprising the following steps: acquiring a first curvature radius of a second lens and a second curvature radius of a third lens, determining a first adjusting instruction and a second adjusting instruction, adjusting the second lens and the third lens according to the first adjusting instruction and the second adjusting instruction, controlling a first light beam emitted by a first semiconductor laser chip to enter a polarization beam splitter via the first lens and the adjusted second lens, controlling a second light beam emitted by a second semiconductor laser chip to enter the polarization beam splitter via the first lens, the adjusted third lens and a mirror in sequence, combining the first light beam and the second light beam into a third light path by the polarization beam splitter to form a third light beam, and making the third light beam enter an optical fiber via a fourth lens. By using the application, the output power of the semiconductor laser module can be increased without changing the size of the semiconductor laser module.

The light emitting device includes: a first light emitting element chip; a second light emitting element chip having a larger light output than the first light emitting element chip, configured to be driven independently of the first light emitting element chip, and arranged side by side with the first light emitting element chip; and a light diffusion member including: a first region provided on an emission path of the first light emitting element chip; and a second region provided on an emission path of the second light emitting element chip, the second region having a larger diffusion angle than the first region.

An optical device is provided which does not need a collimate lens, and which has a high available efficiency of light. The optical device includes a light source unit 1 emitting light with a wavelength λ, and an optical element 2 with a concavo-convex structure including periodical lenses. When n is a natural number equal to or greater than 1, and the size of a k-th (where k is a natural number equal to or greater than 1) pitch from the smallest one among the pitches of the concavo-convex structure is Pk, a distance L1 between the light source unit and the optical element satisfies the following formula 1 for equal to or greater than any one pitch Pk.(n-0.1)⁢Pk22⁢λ≦L1≦(n+0.1)⁢Pk22⁢λ(1)

A multi-frequency laser system includes a first beam splitter configured to split a first beam into a high-power portion and a low-power portion of the first beam, and a second beam splitter configured to split a second beam into a high-power portion and a low-power portion of the second beam, wherein the frequency of the first beam is shifted relative to the frequency of the second beam. The system includes a combiner configured to combine the low-power portion of the first beam and the low-power portion of the second beam to generate a heterodyne beam used to reduce the phase error between the high-power portion of the first beam and the high-power portion of the second beam.

An integrated photonics optical gyroscope fabricated on a silicon nitride (SiN) waveguide platform comprises a first straight waveguide to receive incoming light and to output outgoing light to be coupled to a photodetector to provide an optical signal for rotational sensing. The gyroscope comprises a first microresonator ring proximate to the first straight waveguide. Light evanescently couples from the first straight waveguide to the first microresonator ring and experiences propagation loss while circulating as a guided beam within the first microresonator ring. The guided beam evanescently couples back from the first microresonator ring to the first straight waveguide to provide the optical signal for rotational sensing after optical gain is imparted to guided beam to counter the propagation loss. In a coupled-ring configurations, the first microresonator ring acts as a loss ring, and optical gain is imparted to a second microresonator ring which acts as a gain ring.

The application relates to a kind of annular narrow line width laser and control method, including semiconductor laser, fiber bragg grating, optical splitter, light outlet and self-excitation current regulator;Semiconductor laser has first coupling end, second coupling end and inner resonant cavity, first coupling end is coated with anti-reflection film, and second coupling end is coated with high reflection film;First coupling end, fiber bragg grating, low proportion output end, second coupling end are sequentially coupled to form annular light path;One end of fiber bragg grating and high reflection film form first Fabry-Perot resonant cavity, and the other end and high reflection film form second Fabry-Perot resonant cavity;Self-excitation current regulator is used to tune the current injected into semiconductor laser, so that the oscillation frequency of semiconductor laser, the oscillation frequency of first Fabry-Perot resonant cavity and the oscillation frequency of second Fabry-Perot resonant cavity are consistent, narrow line width is realized, and the advantages of narrow line width, increase light output power and simple packaging are combined.

An optical device may include, for example, a base (21a); ​​a light-emitting element (32) disposed on the base (21a) and emitting laser light; a plurality of optical components disposed on the base (21a) and guiding the laser light emitted from the light-emitting element (32) to an optical fiber (107) and coupling it to the optical fiber (107); and a shielding portion (101d1) disposed on the base (21a) and shielding stray light that deviates from a predetermined optical path and is directed toward a second optical component, which is also an optical component, within a first optical component, and reflecting the stray light in a direction deviating from the first optical component. In the optical device, the shielding portion (101d1) may also reflect stray light away from the base (21a).