76 results about "Optical amplifier" patented technology

An optical device includes a generator, a light emitter, a modulator, an optical amplifier, a current source, a storage, and a controller. The generator generates an electric signal of a multilevel amplitude modulation method. The light emitter emits laser light. The modulator modulates the laser light using the electric signal and outputs an optical signal. The optical amplifier optically amplifies the modulated optical signal according to a drive current. The current source adjusts the drive current to be supplied to the optical amplifier. The storage previously stores an information with respect to input-output characteristics of the optical signal in the optical amplifier relative to drive current value of the drive current. The controller acquires, from the storage, the input-output characteristics corresponding to the drive current value of the drive current supplied to the optical amplifier and controls the electric signal based on the acquired input-output characteristics.

The optical amplifier comprises an amplification chamber, a first pump, a first heat exchanger, a second pump, and a novel catalyst module. The amplification chamber is configured to receive a laser beam and output an amplified laser beam. The first pump is configured to pump a gain medium into the gain medium system. The second pump is configured to pump a cooling fluid into the first heat exchanger. The first heat exchanger is positioned to transfer heat from the gain medium to the cooling fluid after the gain medium has passed through the amplification chamber. The novel catalyst module comprises a body and a catalyst disposed within the body. The body constitutes part of the gain medium system and is located downstream of the amplification chamber and upstream of the first heat exchanger. During use, the gain medium is adjacent to or in contact with the catalyst.

A laser system for the generation of ultrashort optical pulses of light including an oscillator emitting low power and negatively chirped optical pulses with a spectral bandwidth W1, a dispersive connecting segment to maintain the sign of the chirp of the pulses of the oscillator, an optical amplifier for amplifying the optical light pulses and a negative group velocity dispersion segment for compensating phase contributions of the whole propagation process. During the propagation from the output of the oscillator to the end of the optical amplifier, the chirp of the light pulses will change once from negative to positive chirp. After a final compression stage ultrashort optical pulses can be generated.

Suppressing Stimulated Brillouin Scattering (SBS) in an Optical Amplifier system comprising: an optical fan out which splits a coherent optical beam into a set of multiple optical beams, a set of opti

This invention discloses a photoelectric hybrid integrated module for a semiconductor optical amplifier, relating to the field of electronic device packaging technology. It includes a housing and a substrate fixedly connected to the opening side of the housing to form a closed module cavity. A central mounting base is fixedly connected to the center of the substrate near the cavity, forming a positional reference for fixed spatial coordinates. This invention sets the central mounting base, which carries the heat source, as an absolute physical spatial reference. Using positioning components on the substrate, two mounting bases are forced into spatial alignment with this reference. Through rigid contact between the physical surfaces, the degrees of freedom of the two mounting bases in the lateral and vertical directions are locked, ensuring that the topological coordinates of the coupling components on both sides relative to the central reference are determined by the defined processing geometry, thus eliminating the uncertain deformation stress introduced by the process itself.

The application provides a kind of laser amplifier control system and method, the system includes the seed source, amplifier, phase modulator, nonlinear frequency conversion module and dichroic mirror arranged in sequence on optical path;The light output by nonlinear frequency conversion module is divided into two ways through dichroic mirror, one of which is used as system output light, and the direction of the other light path is provided with optical garbage bin;Adjust the phase modulator, so that the polarization direction of laser matches the nonlinear frequency conversion module, the system output light is the light after nonlinear frequency conversion, and the other way of fundamental light is recycled by optical garbage bin;Otherwise, the nonlinear frequency conversion module only outputs the fundamental light.By using the application, whether there is system output light, laser always passes through the crystal in nonlinear frequency conversion module, and the crystal will not exist the temperature drift caused by selective laser passing, to ensure the stability of system output light.

The present invention provides an integrated distributed optical fiber sensing system comprising: an on-chip integrated laser (1), an injection locking unit (3), a distributed feedback laser (2), a semiconductor optical amplifier (5), an optical circulator (6), a sensing optical fiber (7), and a coherent detection unit (4), wherein the on-chip integrated unit (10a) is obtained by on-chip integration of the injection locking unit (3) and the coherent detection unit (4).

Transparent optical repeater for satellite, and communication satellite including such a repeater. This transparent optical repeater, configured for onboard use on a satellite, comprises: - an optical fiber (OF) assembly; - a first optical head (OHU1); - a first low-noise optical amplifier (LNOA); - a polarization splitter and controller (PCS) comprising, for each output channel of the bandpass filter (BPF), a channel polarization splitter and controller (C-PCS); - a third high-power optical amplifier (HPOA), per output channel of the polarization splitter and controller (PCS); - a polarization combination unit (PBC), configured to recombine the respective output channels of the two optical multiplexers (HPWDM); and - a second optical head (OHU2) configured to output the optical signals from the output of the polarization combination unit (PBC). Figure for the abstract: [Fig. 4]

The application provides a light frequency comb generation device and method based on a series double microcavity structure. The device comprises a pump laser, an optical amplifier, a polarization controller, a first tapered lens fiber, a series double microcavity structure and a second tapered lens fiber connected in sequence. The second tapered lens fiber is connected to a spectrum analyzer and an oscilloscope through a first coupler. The optical amplifier is used to amplify the power of the output laser of the pump laser to reach the power threshold required for microcavity light frequency comb generation. The polarization controller is used to adjust the polarization mode of the output laser of the optical amplifier so that the polarization mode of the laser is the same as the polarization mode of the microcavity light frequency comb to be generated. The series double microcavity structure comprises a bus waveguide and two microcavities coupled thereto and is used to generate a light frequency comb. The application can solve the technical problems of high pump power, low energy conversion efficiency and low parameter selection freedom of the existing light frequency comb based on a single microcavity structure.

An optical semiconductor device according to the present disclosure includes a semiconductor substrate, at least one semiconductor laser provided on the semiconductor substrate, an optical multiplexer / demultiplexer circuit provided on the semiconductor substrate, multiplexing or demultiplexing first output light of the semiconductor laser and outputting second output light and third output light, a first waveguide portion provided on the semiconductor substrate, and outputting the second output light from an end face of the semiconductor substrate, and a second waveguide portion including an optical amplifier amplifying the third output light and a reflecting portion and provided on the semiconductor substrate, wherein the reflecting portion includes a diffraction grating that reflects the third output light amplified by the optical amplifier to feed back to the semiconductor laser via the optical amplifier and the optical multiplexer / demultiplexer circuit, and the semiconductor laser and the reflecting portion form a resonator.

This application provides an erbium-doped optical fiber, an optical amplifier, and a communication device, relating to the field of optical communication technology. The erbium-doped optical fiber is a radiation-resistant erbium-doped fiber, exhibiting good gain and a low noise figure. The erbium-doped optical fiber includes a core and a cladding, with the cladding enclosing the core. It also includes a radiation-resistant layer disposed between the core and the cladding, comprising germanium, fluorine, and silicon dioxide. The absolute value of the difference between the refractive index of the radiation-resistant layer and the refractive index of the core is less than the absolute value of the difference between the refractive index of the radiation-resistant layer and the refractive index of the cladding.

A method according to one embodiment of the present disclosure for controlling an optical amplification device (10) of a polarization diversity configuration comprises: detecting a first optical intensity of first polarized waves from a first amplifier (102) which is disposed between a polarization splitter (121) and a polarization combiner (122); detecting a second optical intensity of second polarized waves from a second amplifier (103) which is disposed between the polarization splitter (121) and the polarization combiner (122); detecting a third optical intensity of the first polarized waves from the polarization combiner (122) in a state where the second polarized waves are not input to the polarization combiner (122); detecting a fourth optical intensity of the second polarized waves from the polarization combiner (122) in a state where the first polarized waves are not input to the polarization combiner (122); and acquiring loss of the first polarized waves from the first amplifier (102) to the polarization combiner (122) and loss of the second polarized waves from the second amplifier (103) to the polarization combiner (122) on the basis of the first optical intensity, the second optical intensity, the third optical intensity, and the fourth optical intensity.

This optical amplifier 1 includes: an amplification optical fiber 22 having a core region 221 to which a rare earth element is added; an excitation optical fiber 23 for propagating excitation light emitted from an excitation light source 11; an optical fiber 21 for propagating signal light; and a combiner 12 which is connected to the amplification optical fiber 22, configured to combine the excitation light and the signal light and input the combined light into the amplification optical fiber 22, wherein the signal light propagates through the core region 23 of the amplification optical fiber 22, the excitation light propagates through a cladding region 222 of the amplification optical fiber 22, and the core diameter of the excitation optical fiber 23 is equal to or less than the diameter of the cladding region 222 of the amplification optical fiber 22.

This invention discloses a coherent wind-measuring lidar and its wind measurement method, relating to the field of lidar. The lidar includes a light source, a beam splitter, a modulator, an optical amplifier, a circulator, an optical transceiver module, and a signal detection and processing module. The light source is coupled to the beam splitter; the optical amplifier and modulator are both coupled to the beam splitter; the modulator is coupled to the signal detection and processing module; the optical amplifier is coupled to the circulator; and both the optical transceiver module and the signal detection and processing module are coupled to the circulator. The output beam of the light source is split into a probe beam and a local oscillator beam by the beam splitter. The probe beam is amplified by the optical amplifier and output to the target. The echo beam returned from the target is incident on the signal detection and processing module, and the local oscillator beam is modulated into pulsed light and then incident on the signal detection and processing module. The signal detection and processing module performs mixing, conversion, and signal processing on the received signals to obtain the target information. This invention can reduce the manufacturing cost of lidar and improve the accuracy of wind measurement.

This invention proposes a high-power, high-coupling-efficiency semiconductor optical amplifier waveguide structure, comprising a first waveguide (8), a second waveguide (9), and a third waveguide (10) arranged sequentially. The first waveguide is a straight waveguide region located at the light input end of the waveguide structure; the third waveguide is a straight waveguide region located at the light output end of the waveguide structure; and the second waveguide is an adiabatic waveguide region with a ridge width that varies as a high-order continuous function. In the direction of light propagation, the width of the adiabatic waveguide region gradually increases from narrow to wide, and the curvature at the beginning / end of the adiabatic waveguide region is the same as the curvature of the straight waveguide regions before and after the adiabatic waveguide region, respectively. The ridge width of the adiabatic waveguide region gradually changes, and the waveguide width at the beginning / end of the adiabatic waveguide region is the same as the width of the straight waveguide regions before and after the adiabatic waveguide region. This invention can significantly improve the power amplification and coupling efficiency of the SOA.

Disclosed herein are optical amplifier devices, optical amplifier assembly, and optical amplifier systems. Example embodiments may include: a plurality of input optical ports, each being configured to receive one of a plurality of input optical signals; a plurality of output optical ports, each being configured to output one of a plurality of output optical signals; a plurality of tap photodiodes, each respectively being connected to one of the plurality of input optical ports and the plurality of output optical ports; a wavelength division multiplexer configured to receive the input optical signal from each of the plurality of input optical ports and an optical input from a laser pump device and output a plurality of pumped optical signals; a plurality of erbium-doped fiber coils, each having a first end configured to receive one of the plurality of pumped optical signals and a second end configured to output an amplified optical signal; and an optical isolator configured to receive, for each of the plurality of erbium-doped fiber coils, the amplified optical signal and output the plurality of output optical signals, wherein the plurality of output optical ports are configured to receive one of the plurality of output optical signals.

The application discloses a multimode laser, a pump laser, an optical amplifier and a communication system, and relates to the field of optoelectronic communication. The multimode laser comprises a shell, a laser unit, a first collimating assembly, a wavelength selection reflection assembly and a second collimating assembly and an output tail fiber located in the shell. The laser unit is used for outputting pump light of a first wavelength to the first collimating assembly. The pump light can be transmitted along a first path or a second path. The first path is composed of the first collimating assembly, the wavelength selection reflection assembly, the second collimating assembly and the inner cladding of the output tail fiber. The second path is composed of the first collimating assembly, the second collimating assembly, the wavelength selection reflection assembly and the inner cladding of the output tail fiber. The wavelength selection reflection assembly is used for reflecting signal light of a second wavelength output by the core of the output tail fiber. The second wavelength is greater than the first wavelength. The embodiment of the application can solve the problem that the maximum output power of the optical amplifier is limited.

The application belongs to the field of distributed optical fiber sensing detection, and discloses a distributed strain and temperature sensing device and method based on chaotic laser Rayleigh scattering. The device comprises a chaotic laser. Chaotic laser emitted by the chaotic laser enters a pulse modulator after an isolator, is modulated into pulsed laser, then enters a sensing optical fiber through a first optical circulator after a light amplifier and a polarization scrambler. Rayleigh scattering occurs along the sensing optical fiber, backward Rayleigh scattering light signals are output after returning to the first optical circulator, and are converted into electric signals by a photoelectric detector. The electric signals enter a data processing system after a data acquisition card. Quantitative measurement of strain is realized through linear relationship between cross-correlation frequency shift and strain or temperature. The application uses chaotic laser with low coherence state as detection light pulse, which can ensure wide measurement range under medium sensitivity.

A monolithic edge-emitting semiconductor diode array chip (100) comprises a one-dimensional array (70) of diode emitters (50), such as laser diodes, superluminescent diodes or semiconductor optical amplifiers. Semiconductor layers are arranged on a conductive substrate (1) and include active region layers (14) arranged between upper and lower cladding layers (12, 16) and separation layers (4, 5) arranged between the conductive substrate (1) and the lower cladding layer (16). The diode emitters (50) are formed by respective ridges (9) that are separated by trenches (25) which are sufficiently deep to penetrate into the separation layers (4, 5). Each diode (50) has its own upper and lower contacts (22, 24) that allow each diode (50) to be independently drivable with a current source driver circuit connected to push a modulated push current through its associated diode and / or a current sink connected to extract a modulated pull current through its associated diode.

Embodiments of this disclosure relate to the catalytic conversion of a gas medium in an optical amplifier. An extreme ultraviolet (EUV) light system includes an optical amplifier system and an optical conversion system. Each optical amplifier in the optical amplifier system includes a gain medium in the form of a gas mixture that generates an amplified light beam. The optical amplifier system includes a fluid inlet and a fluid outlet through which the gas mixture can flow. The catalytic conversion system is fluidly connected to the fluid outlet of the optical amplifier system and to the fluid inlet of the optical amplifier system. The catalytic conversion system includes a catalytic converter comprising: a housing; a substrate having openings within the housing through which the gas mixture can flow; and a catalyst, applied as a coating to the inner surface of the openings of the substrate, the catalyst comprising particles of a metal. The metal particles may be nanoparticles of a noble metal.

The present application relates to the technical field of optical communications, and is used for ameliorating the problem of costs of optical amplifier systems being relatively high. Provided are an optical amplifier system and an optical communication system. The optical amplifier system comprises multiple stages of optical amplifiers, which are connected in sequence, wherein at least one stage of optical amplifier is a double-pass optical amplifier, and a pump bidirectional bypass is provided between a first optical amplifier and a second optical amplifier from among the multiple stages of optical amplifiers; and the pump bidirectional bypass, which is used for directing residual pump light in the first optical amplifier into the second optical amplifier or directing residual pump light in the second optical amplifier into the first optical amplifier. At least one stage of double-pass optical amplifier is used in the optical amplifier system provided in the embodiments of the present application, such that the pump conversion efficiency can be improved and the residual pump can be reduced; and by means of providing a pump bidirectional bypass between different stages of optical amplifiers, and sharing residual pump light between two stages of optical amplifiers, the pump conversion efficiency can be improved, and the costs of the optical amplifier system can then be reduced by means of reducing the pump power or reducing the pump consumption.

Amplifiers can be appropriately positioned in optical communication systems. [Solution] An information processing device is provided, comprising: an acquisition unit that acquires information indicating whether or not a detachable optical amplifier that amplifies at least one of a transmitted optical signal and a received optical signal is connected to a first optical relay device; a determination unit that, if the detachable optical amplifier is connected to the first optical relay device, determines the gain of the detachable optical amplifier based on the signal quality between the first optical relay device and a second relay device that communicates with the first optical relay device by optical signal; and a control unit that causes the detachable optical amplifier to set the gain determined by the determination unit.

A quantum communication system (1) has an entangled photon transmitter (2) with a source which is configured to generate at least one pair of entangled photons. The pair of entangled photons has a first photon (P1) emitted on a first propagation path (D1) and a second photon (P2) emitted on a second propagation path (D2). A first receiver (3) is arranged on the first propagation path (D1) and has a first instrument (35), which is arranged to absorb the first photon in one of two complementary polarisations, and an optical selector (30), which is configured either to allow the first photon to pass towards the first measuring instrument (35) or to prevent it from being measured. A second receiver (4) is arranged on the second propagation path (D2) and has an optical amplifier (40), which makes it possible to demultiply the second photon while maintaining its polarisation, and a measuring instrument (45), which makes it possible to measure the average quantum state of the demultiplied photons (P20).

An optical modulation and amplification apparatus, an optical module, an optical network unit, and an optical communication system are provided. The optical modulation and amplification apparatus includes an electric absorption modulator and a semiconductor optical amplifier. The electric absorption modulator and the semiconductor optical amplifier share a same substrate and a same multi-layer material structure. The multi-layer material structure includes, from bottom to top, at least a first quantum well, an electron blocking layer, a second quantum well, and an upper separate confinement layer. The electric absorption modulator is configured to modulate injection light by using the first quantum well, and the semiconductor optical amplifier is configured to amplify the injection light by using the second quantum well.

The utility model provides a kind of light inter-orbital laser communication terminal of small and light, including optical head and processor module of light connection;Optical head includes first plane mirror, main telescope, second plane mirror, fast mirror, dichroic mirror, first narrowband filter, beam splitter, beam receiving collimator, second narrowband filter, tracking collimating camera, signal light emission collimator, pre collimating mirror, shutter and corner reflector;Processor module includes power module, integrated communication module and optical amplifier module in turn stacked in sequence.The utility model reduces the quality of whole machine by reasonable layout;The key components of optical machine main body are all used composite material with high specific stiffness, while reducing quality, ensure force thermal stability;Integrated processor design is carried out, integrated communication module, optical amplifier and secondary power supply are designed as a whole, reduce metal shielding material, reduce processor weight on the basis of ensuring radiation resistance performance.

The utility model discloses a coherent laser radar system based on quantum erasure, including laser emission module, five beam splitters, frequency shift module, optical amplifier module, circulator CIR, telescope, two -way balanced detector, first collimator, second collimator, reflector, polarization maintaining beam splitter, pump light source, two -way PPLN, filter, first single photon detector, second single photon detector and time correlation single photon counting module. Compared with prior art, the utility model introduces third frequency and realizes photon "disguise", and completes frequency conversion through periodic polarization lithium niobate waveguide, and only needs 14% pulse energy of conventional system to reach 16km wind speed detection, and energy efficiency improves 10 times. Realize the continuous detection of high -speed moving target. The system utilizes the frequency up conversion of the up conversion periodic polarization lithium niobate waveguide to realize the frequency up conversion, thereby realizing the indistinguishability of photon at the detector end.

The application belongs to the technical field of semiconductor optoelectronic devices, and particularly relates to a kind of integrated SOA compensation displacement grating DBR wide tuning laser system, comprising: gain chip area, for providing laser gain;Displacement grating DBR reflection area, optically coupled with gain chip area, constitutes DBR main laser cavity;Double micro-ring resonator module, comprising first micro-ring resonator and second micro-ring resonator;The radius of first micro-ring resonator and second micro-ring resonator is different, and wavelength selection is carried out on the output light of main cavity through vernier effect;Sagnac ring feedback structure, optically coupled with double micro-ring resonator module, for feeding back selected wavelength optical signal to gain chip area;Semiconductor optical amplifier, set outside main cavity, for power compensation of external cavity optical signal and optical signal fed back to laser main cavity.The scheme can realize wide tuning, high stability, low insertion loss single-mode laser output through precise regulation and control of displacement grating, combined with double micro-ring vernier mode selection, Sagnac locking and SOA compensation.

The present disclosure provides a free space optical communication system comprising a superluminescent light emitting diode (SLED) with an ultrashort coherence length configured to generate a broadband beam of light, a modulator configured to modulate the broadband beam of light to encode data and generate a modulated beam of light, a semiconductor optical amplifier (SOA) configured to amplify the modulated beam of light to generate an amplified beam of light, wherein the SOA has a bandwidth of at least 25, 50, or 100 nanometers, and an output configured to transmit the amplified beam of light through a variably refractive medium. The system enables high-bandwidth optical communication with improved performance in atmospheric turbulence.