15 results about "Optical fibre amplifiers" patented technology

This invention discloses a multi-channel programmable miniaturized high-speed FBG demodulation system and method based on an AWG (Optical Fiber Optic Generator), belonging to the field of fiber optic sensing technology. The AWG-based multi-channel programmable miniaturized high-speed FBG demodulation system includes a high-stability broadband light source module, a low-loss isolation module, a miniaturized programmable fiber optic amplifier, a circulator, a two-stage miniaturized high-speed optical switch, a high-crosstalk AWG module, a photoelectric conversion module, a programmable A / D conversion module, and a core control module. The AWG-based multi-channel programmable miniaturized high-speed FBG demodulation method involves the optical signal entering an FBG sensor array, the FBG sensor reflecting the optical signal, the reflected optical signal entering the AWG module, and the output light undergoing photoelectric conversion to calculate the center wavelength of the FBG sensor. This invention, based on an AWG, improves demodulation accuracy while ensuring the demodulation range, achieving continuous wavelength demodulation within the AWG wavelength range.

This invention discloses a transmitting device and its packaging method for improving the performance of a C+L400G fiber amplifier, belonging to the field of optical communication and fiber amplification technology. The device includes an airtight housing, a five-channel pump laser emitting unit, a multiplexing and output unit, a bandwidth gain monitoring unit, a temperature detection unit, and a control and storage unit. The device uses four narrowband monitoring channels to constrain and sample the key gain states of the C-low / C-high / L-low / L-high subbands, and simultaneously collects temperature and the workload of the five pumps. Individualized calibration, threshold determination, and model / parameter writing are completed at the factory stage. During operation, using the monitored signals and temperature as input, a 12-subband gain prediction vector is output through the written prediction model, and the five pump currents are adaptively adjusted using closed-loop control. The packaging method includes steps such as device assembly and connection, sealing and leak detection, factory calibration modeling and writing, and online closed-loop control operation.

A diaphragm-type optical fiber micro-vibration measurement apparatus and method based on a single-pass band microwave photonic filter. The apparatus comprises a broadband light source module (1), a three-port circulator (2), an AU diaphragm optical fiber micro-vibration sensor (3), an erbium-doped optical fiber amplifier (4), a polarization controller (5), an electro-optical modulator (6), a power supply module (7), a radio-frequency source module (8), a dispersion compensation optical fiber (9), a photoelectric detector (10), a data acquisition card (11) and a computer (12), wherein the broadband light source module (1) is connected to one port of the three-port circulator (2) by means of an optical fiber connection line.

The application discloses a high-brightness kilowatt 980nm waveband optical fiber laser, and aims at solving the contradiction between power and beam quality improvement of the prior art.The application is composed of U optical fiber laser unit modules, an optical fiber signal beam combiner, an output cladding light filter and an output coupling end.The optical fiber laser unit modules, the optical fiber signal beam combiner, the output cladding light filter and the output coupling end are connected in series.The optical fiber laser unit module is composed of a single-mode seed source and a K-stage optical fiber amplifier, and the single-mode seed source adopts a fiber oscillator.The K-stage optical fiber amplifier is composed of K single-stage optical fiber amplifiers.The optical fiber signal beam combiner performs power beam combination on the laser output by the optical fiber laser unit module, the output cladding light filter filters cladding light, and the output coupling end couples the laser.The application can make the laser have kilowatt power output, and realize beam quality optimization and brightness improvement.

The utility model discloses a kind of control circuit of high-power optical fiber amplifier, it is related to optical fiber amplifier technical field, high-power optical fiber amplifier includes the first stage gain unit and second stage gain unit sequentially arranged along the transmission direction of light;Control circuit includes the control module, first gain control ring and second gain control ring connected;When starting optical fiber amplifier, control module controls first gain control ring to start first stage gain unit, and the output light power of first stage gain unit is collected, control module controls second gain control ring to start second stage gain unit when the output light power of first stage gain unit is greater than threshold light power;When closing optical fiber amplifier, control module first controls second gain control ring to close second stage gain unit, then controls first gain control ring to close first stage gain unit.The control circuit can improve the security and reliability of the high-power optical fiber amplifier application.

This application provides an optical fiber amplifier, an optical transmitting module, an optical receiving module, and related equipment, which are used to improve the integration of the optical fiber amplifier, reduce its space occupation, and enhance its reliability and mass production capability. The optical fiber amplifier includes a photonic integrated chip, a pump laser, and a gain medium. The photonic integrated chip includes a multiplexing module. The multiplexing module is connected to a first port of the photonic integrated chip through a first optical waveguide. The multiplexing module is connected to a second port of the photonic integrated chip through a second optical waveguide. The second port is connected to the pump laser. The multiplexing module is connected to a third port of the photonic integrated chip through a third optical waveguide. The third port is connected to the gain medium.

The present application relates to the field of optical communication technology, in particular to a kind of optical fiber dispersion compensation adaptive amplification method and device thereof, comprising: obtaining the dispersion compensation value of dispersion compensation module;According to the total gain of dispersion compensation module, the dispersion compensation value is redistributed to multiple fiber amplifiers;According to the gain of each fiber amplifier after redistribution, the first expected attenuation value of the variable optical attenuator arranged in each fiber amplifier is calculated respectively, and the attenuation compensation amount of each variable optical attenuator is calculated according to the dispersion compensation value;According to the first expected attenuation value and attenuation compensation amount, the second expected attenuation value is calculated;According to the probe power of the first input end of variable optical attenuator and the probe power of the first output end, the actual attenuation value is calculated;Actual attenuation value and second expected attenuation value are compared, if consistent, then stop adjusting variable optical attenuator;Otherwise, continue to adjust.

The utility model relates to the technical field of optical fiber communication, especially an optical fiber amplifier and optical communication equipment. The optical fiber amplifier comprises: a photoelectric detector for obtaining input optical power and / or output optical power of the optical fiber amplifier; a pump laser assembly for emitting pump laser; an analog feedforward control module connected with the photoelectric detector and the pump laser assembly respectively for controlling output power of the pump laser; wherein the analog feedforward control module comprises: a transimpedance amplifier, a multiplier and an adder connected in sequence, the transimpedance amplifier is connected with the photoelectric detector, and the adder is connected with the pump laser assembly. The utility model can effectively improve the suppression ability to channel burst increase and decrease wave.

This invention provides an optical waveguide amplifier and a method for fabricating it. The optical waveguide amplifier includes a substrate layer, an insulating layer, a passive waveguide layer, and multiple doped layers. The insulating layers are stacked on the substrate layer. The passive waveguide layer and the multiple doped layers are stacked on the insulating layer. An m-layer doped layer is disposed above the passive waveguide layer, and an n-layer doped layer is disposed below it, where m and n are integers, m+n≥2, and m≥0, n≥0. The multiple doped layers are doped with various rare-earth ions. Compared to fiber amplifiers doped with rare-earth elements, the optical waveguide amplifier in this embodiment is smaller, which simplifies the device structure, reduces device size, and lowers costs. Compared to existing on-chip optical waveguide amplifiers, the optical waveguide amplifier in this embodiment can be doped with various rare-earth ions, enabling the amplification of broadband signals and broadening its applicability.

This disclosure relates to the optical communication technology, and more particularly to an optical fiber dispersion compensation adaptive amplification method and apparatus thereof, the method comprising: obtaining a dispersion compensation value of a dispersion compensation module; redistributing the total gain of the dispersion compensation module to a plurality of optical fiber amplifiers based on the dispersion compensation value; calculating a first expected attenuation value for each variable optical attenuator installed in each optical fiber amplifier based on the redistributed gain of each optical fiber amplifier, simultaneously calculating the attenuation compensation amount for each variable optical attenuator based on the dispersion compensation value; calculating a second expected attenuation value based on the first expected attenuation value and the attenuation compensation amount; calculating an actual attenuation value based on the detected power of the first input terminal and the detected power of the first output terminal of the variable optical attenuator; and comparing the actual attenuation value with the second expected attenuation value, stopping the adjustment of the variable optical attenuator if they match, and continuing the adjustment if they do not match.

This utility model relates to the field of detection device technology, specifically a double-sided label pad detection device, including a workbench with a shelf and a column. A top seat is rotatably connected to the top of the column, and several electrically operated telescopic rods are fixedly connected to the bottom of the top seat. A label pad is fitted onto the output end of each of the electrically operated telescopic rods. This utility model utilizes an optical fiber amplifier and a through-beam sensor, employing the principle of detecting differences in light transmittance between label pads with different numbers of layers, to effectively detect the presence of double-sided pads (two or more label pads) in a product. This achieves automated detection, significantly improving detection efficiency and accuracy compared to manual detection. It also provides real-time feedback of detection results, ensuring smooth production line operation. Furthermore, the fixed components facilitate the disassembly and assembly of the optical fiber amplifier, allowing for quick removal of faulty amplifiers for maintenance and replacement.

This invention provides a real-time optical reflection detection device for an optical fiber amplifier, comprising an optical fiber amplifier, a coupler, a splitter, a photodetector, a processing module, and a main controller. The straight-through arm of the coupler is connected to the optical fiber amplifier, the input arm of the coupler is connected to the optical splitter, the coupling arm of the coupler is connected to the photodetector, the photodetector is connected to the processing module, and the processing module is connected to the main controller. The main controller is connected to the optical fiber amplifier. The processing module converts the current signal output by the photodetector into a logarithmically correlated voltage signal. This invention monitors and provides feedback on the optical reflection intensity in real time, and uses the intensity to determine whether the system is at risk of instability or damage, ensuring timely troubleshooting in case of faults and guaranteeing the normal operation of the optical fiber amplifier.