676 results about "Optical amplifier" patented technology

The invention discloses an optical frequency comb generation method and device based on Brillouin scattering and an electro-optical modulator, and belongs to the field of photoelectric measurement. The method comprises the steps that a first laser and a second laser are used for generating pump light and seed light respectively, multi-wavelength pump light is generated through a cascade electro-optical modulator, the pump light and the seed light are emitted into a Sagnac loop, an optical frequency comb is output through the forward Brillouin scattering effect of an optical fiber and the electro-optical modulator, and the seed light and the pump light are output. The polarization controller is adjusted to optimize polarization state matching of the pump light and the seed light, so that the Brillouin scattering effect reaches the maximum value. The device is composed of a laser, an electro-optical modulator, a signal generator, an optical amplifier, an optical isolator, an optical coupler, a polarization controller and an optical fiber. The optical fiber forward Brillouin scattering effect and the electro-optical modulator are combined, the optical frequency comb giving consideration to the wide frequency spectrum and the narrow interval is generated, meanwhile, the comb tooth interval of the optical frequency comb can be accurately controlled by independently adjusting the frequency of the signal generator, and accurate measurement of signals or objects is achieved.

A Rydberg sensor may include a probe laser source and a quantum radio frequency (QRF) cavity downstream from the probe laser source and configured to define a path for a plurality of probe laser beam passes within the QRF cavity. A Rydberg sensing region may be within the QRF cavity and in the path of the probe laser beam passes. An optical amplifier may be within the QRF cavity and in the path of the probe laser beam passes. A detector may be downstream from the QRF cavity.

A semiconductor optical amplifier (SOA) with a variable optical confinement factor I′ along the length of the device is disclosed. At the input end of the SOA, the optical confinement is high as an optical core is adjacent an optical gain layer, resulting in a high-gain region that rapidly increases the optical signal power. In the central portion of the SOA, the optical confinement is continuously reduced as the optical core is tapered away from the optical gain layer, thereby lowering the gain, but increasing the output saturation power. Near the output end of the SOA, the optical confinement factor is held constant, providing a length of additional gain, thereby further increasing the output power. The SOA may optionally include a spot-size converter region to focus the output optical signal.

High-power, integrated optical amplifiers are described in which gain waveguides of the amplifiers are designed to improve power performance by reducing power saturation effects in the amplifier. The gain waveguides can change, in at least one aspect, along the length of the gain waveguide to reduce gain saturation. Multi-mode optical beams and / or multi-stage amplification can also be employed to reduce gain saturation.

The invention discloses an OEO amplifier with a high-speed hard switching function and an optical transmission system, and relates to the technical field of optical amplifiers, the OEO amplifier comprises three magneto-optical switches, an optical splitter group, a photoelectric detector group, a real-time comparison circuit, a logic gate control circuit and a driving circuit; the photoelectric detector group collects optical signal power to generate an electric signal; the real-time comparison circuit performs voltage threshold judgment on the electric signal; the logic gate control circuit is connected with the output end of the real-time comparison circuit so as to synchronously control the switching states of the three magneto-optical switches according to a voltage threshold judgment result; the driving circuit is used for driving the magneto-optical switch to synchronously execute a switching action; when the OEO amplifier detects that optical signals in any direction are interrupted, all the magneto-optical switches finish synchronous switching within 100 microseconds, and the end-to-end optical signal switching time difference is smaller than 2 picoseconds. The method is suitable for a single-fiber bidirectional optical communication environment requiring high frequency, high precision and high stability.

A miniaturized interferometric integrated photonic gyroscope structure with top silicon oxide, middle silicon oxide and bottom silicon oxide deposited on a silicon substrate comprises broadband optical source or a semiconductor optical amplifier with silicon nitride ring resonator wavelength filter, connected with a thin film lithium niobate or piezoelectrically actuated silicon nitride phase modulator vertically coupled with a silicon nitride waveguide spiral loop. The silicon nitride waveguide spiral loop is patterned on thin bottom oxide layer with air trenches below it and connected with a germanium detector either through photonic wire bonding or vertically integrated through reflecting mirror embedded into silicon wafer. Various methods of coupling alternative materials are described and the potential of connecting several spiral waveguides for enhanced sensitivity in a gyroscope application.

The embodiment of the application provides an optical amplifier, an optical assembly, an optical module, an optical communication network system and a detection device, relates to the technical field of semiconductors, and is used for solving the problem of one-way light emission of the optical amplifier. The optical amplifier comprises a waveguide and a photonic crystal. The waveguide comprises a core region and a cladding region arranged at the periphery of the core region. The waveguide further comprises an incident light side, a first light emission side and a second light emission side. The photonic crystal is arranged in the cladding region of the waveguide. The core region is located between the incident light side and the first light emission side, and the photonic crystal is located between the second light emission side and the core region. The photonic crystal is used for receiving incident light from the incident light side and emitting first emitted light and second emitted light. The first emitted light is emitted from the first light emission side, and the second emitted light is emitted from the second light emission side.

The invention relates to the technical field of semiconductor lasers, and particularly provides a tunable narrow-linewidth multi-wavelength laser based on injection locking, which comprises a light source, an optical splitter, a coupler, a photoacoustic frequency shifter and a micro-ring, the optical path of each sub-beam is provided with a photoacoustic frequency shifter and a micro-ring, the photoacoustic frequency shifters are responsible for adjusting the frequency of the sub-beams, the micro-rings and a light source form an injection locking relation and compress the line width of the sub-beams, then all the sub-beams are combined through a coupler, and finally power amplification is conducted through a semiconductor optical amplifier. Through the optical splitter, the photoacoustic frequency shifter and the micro-ring, the single light source system outputs equally-spaced multi-wavelength laser, and the defects of a traditional multi-light-source design are overcome.

A semiconductor optical amplifier array device includes: a substrate; and a plurality of semiconductor optical amplifiers formed on the substrate, each of the semiconductor optical amplifiers including an active region, and two input-output ports optically connected to the active region and disposed on same facet of the semiconductor optical amplifier array device. The plurality of semiconductor optical amplifiers include a first semiconductor optical amplifier in which length of the active region is equal to a first length, and a second semiconductor optical amplifier in which length of the active region is equal to a second length that is different from the first length.

The invention discloses a relay device and method for long-distance few-mode optical fiber communication, and belongs to the field of optical communication. According to the device, firstly, optical signals transmitted in a few-mode optical fiber are separated into a plurality of independent mode channels through a mode decomposition multiplexer; then, an adjustable light delay unit is configured in each channel, and compensation is carried out according to a difference mode group delay difference pre-calculated or actually measured by a few-mode optical fiber parameter; furthermore, a dimmable amplifier is used for amplifying the signal, power monitoring is carried out at the output end of the amplifier through an optical fiber beam splitter and a photoelectric detector, closed-loop feedback control is formed, and gain of each channel is adjusted in a self-adaptive mode to eliminate mode-dependent loss. According to the invention, signal distortion can be effectively suppressed in an optical domain, the complexity of digital signal processing of a receiving end is reduced, and the transmission distance and the transmission capacity of a few-mode optical fiber mode division multiplexing communication system are remarkably improved.

A tunable laser includes: a channel selection assembly, a plurality of optical amplifiers, a micro-ring filtering assembly and a reflection assembly. The micro-ring filtering assembly is coupled to the reflection assembly, and operation wavelength ranges of the respective optical amplifiers are different. The channel selection assembly is used for selecting any optical amplifier to input a gain optical signal to the micro-ring filtering assembly. The micro-ring filtering assembly is used for filtering the gain optical signal under a vernier caliper effect to obtain filtered optical signals, and then inputting same into the reflection assembly. The reflection assembly is used for outputting some of the filtered optical signal outwards, and reflecting, after the remaining optical signals pass through the micro-ring filtering assembly, the remaining optical signals to an optical amplifier currently selected by the channel selection assembly.

A wavelength variable optical resonator includes a wavelength variable filter and first and second waveguides each including a part inclined relative to a first end surface. A first optical amplifier includes a third waveguide including an active region on which reflection means is provided, the third waveguide being provided between a second end surface and a third end surface opposed to the second end surface and, the third waveguide further including a part inclined relative to the second end surface and extended from the second end surface. A second optical amplifier amplifies a laser light propagating through a fourth waveguide after the laser light whose wavelength is adjusted by the wavelength variable filter is input to the fourth waveguide via a fourth end surface facing the first end surface, the fourth waveguide including a part inclined relative to the fourth end surface and extended from the fourth end surface.

The invention relates to a sweep frequency optical frequency comb generation system and a generation method. Fourier mode locking is realized through a Fourier mode locking photoelectric oscillator system. The sweep frequency optical frequency comb generation system is a closed Fourier mode-locked laser loop which is composed of a first optical amplifier, an optical fiber isolator, a broadband filter, a polarization controller, a thin film lithium niobate optical chip, a signal generator, a dispersion compensation optical fiber and a first optical coupler; and a photoelectric oscillator loop is formed by a second optical coupler, a single-mode delay optical fiber, a second optical amplifier, a photoelectric detector, a narrow-band filter, a low-noise amplifier and an electric power divider. Time domain active mode locking and Fourier mode locking are carried out on the laser resonant cavity at the same time, synchronous modulation of multiple optical frequency comb modes is achieved, sweep frequency optical frequency comb signals with high repetition frequency, high modulation speed, high coherence length and high output power are generated, and tunable optical frequency comb and high-quality high-frequency microwave signal output can be provided at the same time.

The invention relates to the technical field of optical amplifiers, in particular to an optical amplifier based on QSFP-DD packaging. The optical amplifier comprises a packaging shell, a circuit board, an optical assembly and a heating piece. The circuit board is arranged in the packaging shell, and a connecting module is arranged at one end, penetrating out of the shell, of the circuit board; the optical assembly comprises an erbium-doped optical fiber which is located in the packaging shell and arranged on one side of the circuit board in the thickness direction; the heating element is arranged in the packaging shell and is positioned between the erbium-doped optical fiber and the circuit board; wherein the circuit board is electrically connected to the heating element, and the heating element acts on the Er-doped optical fiber so as to adjust the temperature of the Er-doped optical fiber. The optical amplifier based on QSFP-DD packaging is smaller in size, can meet the arrangement requirement of a high-density data center cabinet, and is more stable in transmission performance during working.

A self-powered optical amplifier (SPOA) may include a proximal tap connected to a fiber optic cable, a proximal wavelength division multiplexer (WDM) optically connected to the proximal tap, and an Erbium doped fiber optically connecting the proximal WDM to a distal WDM. The SPOA may further includes a distal tap optically connected to the distal WDM, a pump optically connected to the distal WDM, and a controller optically connected to the proximal tap, the distal tap, and further electrically connected to the pump and a power supply.

A Rydberg sensor may include a plurality of Rydberg sensing regions and a probe laser source. An optical path may extend from the probe laser source to feed the Rydberg sensing regions in a series configuration. The sensor may also include at least one optical amplifier for the probe laser source coupled within the optical path between at least one adjacent pair of Rydberg sensing regions.

A LiDAR receiving system includes a substrate, a photonic integrated circuit board (PICB) on the substrate, a light guiding assembly and an optical amplifier each integrated on the PICB, and a photoelectric conversion device. The light guiding assembly includes an input coupling grating, a first optical waveguide, a second optical waveguide and an output coupling grating. The input coupling grating is configurated for coupling a first optical signal into the first optical waveguide, the first optical waveguide is configurated for transmitting the first optical signal, the optical amplifier is configurated for amplifying the first optical signal into a second optical signal, the second optical waveguide is configurated for transmitting the second optical signal to the output coupling grating, and the photoelectric conversion device is configurated for converting the second optical signal into an electrical signal.

Provided are a silicon-based tunable filter, laser and an optical module. The tunable laser comprises a semiconductor optical amplifier and a silicon photonic integrated chip, wherein a first coupler, a phase regulator and a tunable filter are provided on the silicon photonic integrated chip; the tunable filter comprises a flat-top band-pass filter structure, a Mach-Zehnder interferometry (MZI) structure and a micro ring resonation (MRR) structure, which are cascaded; gain light emitted by the semiconductor optical amplifier is coupled to the silicon photonic integrated chip by means of the first coupler, and a narrowband filtered optical signal is output by means of the tunable filter; and the phase of the gain light is regulated by means of the phase regulator so as to output single-peak narrowband laser light with a tunable target wavelength.

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.

The invention discloses a high-power super-radiation light-emitting diode based on three-section integration and a preparation method, belongs to the technical field of structures and processing of optoelectronic devices, and solves the technical problem of directional amplification of optical power output by a super-radiation light-emitting diode based on a three-section integration structure. The diode is of a three-section integrated structure, and the three-section integrated structure is of a cascade structure formed by sequentially connecting a DBR grating area, a J-shaped ridge waveguide super-radiation light-emitting diode area and a semiconductor optical amplifier area. The three-section integrated structure is provided with multiple layers of structures from bottom to top, and the multiple layers of structures are a lower electrode, a lower substrate, a lower limiting layer, an MQW multi-quantum well active layer, an upper limiting layer, an upper substrate and an upper electrode in sequence. And the DBR grating region comprises a waveguide layer and a transverse tapered waveguide structure of a cladding. The J-shaped ridge waveguide super-radiation light-emitting diode area is composed of a bent waveguide part and a straight waveguide part. The semiconductor optical amplifier area is of a conical traveling wave structure. The optical power amplifier is suitable for the fields of optical coherence tomography and optical fiber gyroscopes, and optical power amplification is achieved.

Provided is an optical device having a long lifetime and high reliability. An optical device according to one embodiment comprises at least one Mach-Zehnder (MZ) modulator and a redundant semiconductor optical amplifier (SOA). The redundant SOA is connected to at least one MZ modulator via a 2-input 2-output coupler. The redundant SOA includes two SOAs arranged in parallel, and the two SOAs are arranged in two waveguides connected to the 2-input 2-output coupler, respectively. The redundant SOA is configured to switch the two SOAs to amplify light modulated by the at least one MZ modulator or light obtained before modulation.

The present disclosure is directed to a manufacturing process for a LIDAR system with individualized semiconductor optical amplifier (SOA) dies including: (a) forming a plurality of SOA regions on a semiconductor wafer; (b) dicing the semiconductor wafer to produce a plurality of individualized SOA dies, the plurality of individualized SOA dies respectively including the plurality of SOA regions; (c) aligning the plurality of individualized SOA dies with one or more array inputs, the one or more array inputs configured to provide a beam from a light source to the plurality of individualized SOA dies; and (d) aligning the plurality of individualized SOA dies with one or more array outputs, the one or more array outputs configured to provide the beam from the plurality of individual SOA dies to an emitter.

The optical module provided by the invention comprises an optical fiber array, an optical modulation chip, a first optical amplifier, a first reflecting surface group, a second optical amplifier and a second reflecting surface group. The optical fiber array transmits light to be modulated into the light modulation chip. A light modulator in the light modulation chip modulates the light to be modulated and then outputs first modulated light and second modulated light which are different in polarization state. The first optical amplifier amplifies the first modulated light and transmits the amplified first modulated light into the optical modulation chip through the first reflecting surface group. And the second optical amplifier amplifies the second modulated light, and transmits the amplified second modulated light into the optical modulation chip through the second reflecting surface group. The amplified first modulated light and the amplified second modulated light are combined in an optical combiner arranged in the optical modulation chip so as to synthesize an optical emission signal. According to the invention, the first optical amplifier and the second optical amplifier respectively amplify the first modulated light and the second modulated light, so that the light transmitting power is increased.

Scalable multi-band wavelength division multiplexing (WDM) transceiver architectures suitable for high-bandwidth optical Compute interconnects (OCI) between computing resources. The WDM wavelength range is divided into two or more color / wavelength bands. Each band of WDM optical signals may be coupled through separate semiconductor optical amplifiers (SOAs) that are tuned to the different bands. The bands may be conveyed through an optical MUX / DeMUX for transmission through an optical fiber. The optical MUX / DeMUX may comprise a band MUX / DeMUX or a polarization MUX / DeMUX.

A pump light generation unit of an optical amplifier pumping device outputs pump light with a single wavelength or a plurality of wavelengths from a plurality of output ports. A pump light multiplexing unit polarization-multiplexes or wavelength-multiplexes the plurality of pieces of pump light which has been output from the pump light generation unit. A polarization scrambler collectively polarization-scrambles the polarization-multiplexed or wavelength-multiplexed pump light which has been output from the pump light multiplexing unit and outputs the polarization-scrambled pump light to an optical waveguide for pump light. The optical waveguide for pump light inputs the pump light which has been polarization-multiplexed or wavelength-multiplexed by the pump light multiplexing unit to the pump light superimposition unit. A pump light superimposition unit multiplexes the polarization-multiplexed or wavelength-multiplexed pump light and signal light. A pump light output port superimposes the pump light on the signal light by outputting the pump light from the pump light superimposition unit to the gain medium so that the pump light propagates in the same direction as the signal light.

The invention belongs to the technical field of optical communication, and particularly relates to a feedback type space laser communication power adaptive compensation method. According to the method, a system comprising an A end, a B end and a feedback control circuit is constructed, and the method comprises the steps that a baseband signal of a transmitting end is modulated, amplified and then transmitted, an optical splitter of a receiving end distributes a received optical signal in proportion, 90% of the optical signal is used for communication demodulation to obtain information, and 10% of the optical signal is used for power detection; a signal for power detection is processed to generate an analog signal which is fed back to an opposite end. At a transmitting end, a demodulation and control unit regulates and controls the amplification factor of an optical amplifier according to a received power feedback control signal so as to realize self-adaptive compensation of the space laser communication power. According to the method, power fluctuation caused by factors such as atmospheric channel change and distance change can be dealt with in real time, the defects of traditional space laser communication power control are effectively overcome, and the reliability and stability of a communication link are remarkably improved.

The invention relates to the field of semiconductor device and integrated circuit research, in particular to a semiconductor device dose rate effect laser simulation system. Multiple wavelengths and a wide energy range are achieved through the optical fiber laser pulse seed source assembly and the solid laser amplifier assembly, the pulse width can range from 1 ns to 100 microseconds, variable complex waveforms such as square waves, rectangular waves, sine waves and pulse strings are achieved, and pulse laser with the energy range from the nanojoule level to the joule level and adjustable wavelengths and waveforms can be output according to requirements. The high-low energy laser adopts a common-path design, so that the system integration degree is improved; light spots are adjustable from centimeter level to micron level, and global irradiation and micro-area positioning and scanning of an irradiation sample can be realized. According to the invention, dose rate effects under different conditions can be accurately and flexibly simulated, the blank of a high-energy, variable-waveform and multi-wavelength dose rate effect laser simulation system is filled up, and an efficient solution is provided for the reliability research of devices under a complex irradiation environment.

The invention provides an electromagnetic field constraint system and constraint method for a CO2 laser amplifier, and the system comprises a spiral electrode which is wound on a discharge tube of the CO2 laser amplifier, the spiral electrode comprises a first DC positive electrode, a radio frequency positive electrode, a second DC positive electrode and a ground electrode which are sequentially and adjacently arranged, and the current flows through the first DC positive electrode in the electric field direction from the first DC positive electrode to the ground electrode. The electric field direction of the current from the second direct current positive electrode to the ground electrode is partially perpendicular to the electric field direction of the current from the radio frequency positive electrode to the ground electrode; the CO2 laser amplifier discharge tube and the Helmholtz coil are coaxially arranged, and the magnetic field direction of the Helmholtz coil is perpendicular to the electric field direction from the radio frequency positive electrode to the ground electrode. In the discharge area of the CO2 laser amplifier, the strong electromagnetic field restraint system is adopted, the vertical alternating high-voltage electric field and the vertical alternating high-voltage magnetic field are used for restraining plasma movement, the electro-optical conversion efficiency can reach about 20%, the CO2 laser power can be effectively improved, and the arc discharge problem under the high radio frequency power injection condition is avoided.

An optical communication module, an optical communication system and a control method of an optical amplifier, the optical communication module comprising an optical transmitter, an optical amplifier and a control unit, the optical transmitter being configured to output a first optical signal to the optical amplifier. The optical amplifier is used for amplifying the first optical signal into a second optical signal and outputting the second optical signal to the control unit. And the control unit is used for acquiring a first gain spectrum of the second optical signal and a target gain spectrum of the optical amplifier, and adjusting the working temperature and / or the driving current of the optical amplifier until the similarity between the first gain spectrum and the target gain spectrum is greater than a first threshold value. The pre-tilt control of the optical amplifier is realized by adjusting the working temperature and / or the driving current of the optical amplifier, higher pumping power is not needed, and a device which can influence the optical amplifier does not need to be additionally introduced, so that additional insertion loss is not introduced, and the performance degradation of the whole optical communication system is avoided.

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.