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Multi-channel acousto-optic frequency shift module and single-frequency fiber laser capable of hopping frequency

A fiber laser, acousto-optic frequency shifting technology, applied in lasers, phonon exciters, laser parts and other directions, can solve the problems of inability to achieve precise laser wavelength hopping, inability to meet the application requirements of lidar, and poor wavelength adjustment accuracy. , to achieve the effect of improving efficiency and anti-environmental interference

Pending Publication Date: 2021-12-03
SHANGHAI PRECILASERS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that it can realize the continuous and fast tuning of the single-frequency laser wavelength, and the adjustment range can reach GHz level, but the disadvantage of this method is that the wavelength adjustment accuracy is poor, and the precise hopping of the laser wavelength cannot be realized, which cannot meet Application requirements in fields such as lidar and atmospheric detection

Method used

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  • Multi-channel acousto-optic frequency shift module and single-frequency fiber laser capable of hopping frequency
  • Multi-channel acousto-optic frequency shift module and single-frequency fiber laser capable of hopping frequency
  • Multi-channel acousto-optic frequency shift module and single-frequency fiber laser capable of hopping frequency

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Embodiment 1

[0038] Such as figure 1 As shown, on the one hand, the present application provides a multi-channel acousto-optic frequency shifting module, which includes:

[0039] The optical splitting device 1 is used to receive an optical signal, and form at least two optical splitting signal outputs according to the optical signal; the optical splitting device 1 is a splitting fiber splitter in two or a splitting fiber splitter in multiples. Schematically, the optical splitting device 1 can be formed by a fiber optic beam splitter, which is an optical fiber device based on a fiber fusion tapered taper, and its splitting ratio is determined by the length of the taper; when the number of splits is greater than two, the optical fiber The beam splitter can be a single fiber splitter that splits into multiples, or it can be a fiber splitter module composed of multiple fiber splitters that split into two.

[0040] The acousto-optic modulation device 2 includes at least two acousto-optic modul...

Embodiment 2

[0051] Such as image 3 As shown, in another aspect, the present application further provides a frequency-hopping single-frequency fiber laser with a multi-channel acousto-optic frequency shifting module, which includes a multi-channel acousto-optic frequency shifting module described in any one of the above:

[0052] The single-frequency laser 32 is used to output a single-frequency optical signal; the single-frequency laser 32 can be a single-frequency fiber laser that outputs a single-frequency optical signal, or a semiconductor laser that can output a single-frequency laser, or can output a single-frequency laser solid-state lasers;

[0053] It can also include a pre-fiber amplifier, which is connected between the single-frequency laser and the acousto-optic frequency shifting module. The pre-fiber amplifier performs power amplification processing on the single-frequency optical signal. The pre-fiber amplifier can be based on ytterbium-doped , erbium, thulium, holmium, pr...

Embodiment 3

[0062] Such as Image 6 As shown, in another aspect, the present invention provides a frequency-hopping single-frequency fiber laser device with a multi-channel acousto-optic frequency shifting module, wherein: including at least one frequency-hopping single-frequency optical fiber based on a multi-channel acousto-optic frequency shifting module Laser 40; wherein the frequency-hopping single-frequency fiber laser based on the multi-channel acousto-optic frequency shifting module can be figure 2 The frequency-hopping single-frequency fiber laser based on the multi-channel acousto-optic frequency shifting module is shown. It also includes a second frequency-hopping single-frequency fiber laser or a common single-frequency fiber laser 41 having a wavelength different from that of the above-mentioned frequency-hopping single-frequency fiber laser,

[0063] The second coupling device 42, the input end is respectively connected to at least one frequency-hopping single-frequency fi...

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Abstract

The invention relates to a single-frequency laser, in particular to a multi-channel acousto-optic frequency shift module and a single-frequency fiber laser capable of hopping frequency. The multi-channel acousto-optic frequency shift module comprises a light splitting device used for receiving an optical signal and forming at least two paths of light splitting signal output according to the optical signal, an acousto-optic modulation device and a coupling device; the acousto-optic modulation device comprises at least two paths of acousto-optic modulators, the input ends of the acousto-optic modulators are connected with the light splitting device, and the acousto-optic modulation device is used for receiving one path of light splitting signal and processing the light splitting signal to form a processing signal; and the input end of the coupling device is connected with the acousto-optic modulation device, and the coupling device is used for carrying out coupling processing on the processing signal.

Description

technical field [0001] The invention relates to a single-frequency laser, in particular to a multi-channel acousto-optic frequency shifting module and a frequency-hopping single-frequency fiber laser. Background technique [0002] The frequency-hopping single-frequency laser has the advantages of fast output frequency jumping and high-performance single-frequency laser, and has important application value in the fields of laser radar and atmospheric detection. Generally, there are two ways for a single-frequency laser to output single-frequency laser frequency hopping: one implementation is to insert one or more acousto-optic modulators into the spatial optical path after the output of the single-frequency laser, and through reasonable design of the optical path and control The switch of each acousto-optic modulator can realize the frequency hopping of the single-frequency laser, and then convert the laser wavelength to the required wavelength by summing with another single-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/10
CPCH01S3/06754H01S3/10053
Inventor 潘伟巍张磊付小虎董金岩赵儒臣
Owner SHANGHAI PRECILASERS TECH CO LTD
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