1.0-micron ultralow-noise single-frequency optical fiber laser

A fiber laser, ultra-low noise technology, used in lasers, phonon exciters, laser components and other directions, can solve the problems of complex structure, low-frequency noise degradation, and lack of full fiber

Inactive Publication Date: 2019-10-18
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, there are some problems in the above-mentioned devices: the problem of noise degradation in the low frequency band has not been solved, or the suppression bandwidth is not enough, and the suppression depth is not enough; and the structure is complex, and it does not have the advantage of all-fiber

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  • 1.0-micron ultralow-noise single-frequency optical fiber laser
  • 1.0-micron ultralow-noise single-frequency optical fiber laser
  • 1.0-micron ultralow-noise single-frequency optical fiber laser

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Embodiment 1

[0030] Such as figure 1 As shown, embodiment 1 provides a 1.0 μm ultra-low noise single-frequency fiber laser, which includes high reflectivity fiber Bragg grating 1, high gain fiber 2, low reflectivity fiber Bragg grating 3, TEC thermoelectric cooler 4, pump Pu laser 5, optical wavelength division multiplexer 6, optical filter 7, optical isolator 8, mid-band intensity noise suppression module 9, and low-band intensity noise suppression module 10.

[0031] The structural relationship between the above components is: one end of the high-reflectivity fiber Bragg grating, two ends of the high-gain fiber, and one end of the low-reflectivity fiber Bragg grating, which are connected in sequence to form the DBR short-line type of the laser. The resonant cavity is placed in a TEC thermoelectric cooler for precise temperature control; the other end of the low reflectivity fiber Bragg grating is connected to the common end of the optical wavelength division multiplexer, and the output end o...

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Abstract

The invention discloses a 1.0-micron ultralow-noise single-frequency optical fiber laser. The laser comprises a high-reflectivity optical fiber Bragg grating, a high-gain optical fiber, a low-reflectivity optical fiber Bragg grating, a TEC thermoelectric refrigerator, a pump laser, an optical wavelength division multiplexer, an optical filter, an optical isolator, a medium-frequency-band intensitynoise suppression module and a low-frequency-band intensity noise suppression module. The high-gain optical fiber serves as a gain medium of laser light; laser oscillation is formed under the pumpingof pump light; output laser light is filtered by the optical filter to amplify spontaneous radiation light, so that stable and single longitudinal mode laser output is realized; the laser light enters the medium-frequency-band intensity noise suppression module; the intensity noise near a laser relaxation oscillation peak is effectively suppressed by a semiconductor optical amplifier, and laser power amplification is carried out; then the low-frequency-band intensity noise suppression module is used for suppressing the low-frequency-band intensity noise; and finally high-power, ultralow-noise, narrow-line-width and single-frequency optical fiber laser output is realized.

Description

Technical field [0001] The invention belongs to the technical field of fiber lasers, and specifically relates to a 1.0 μm ultra-low noise single-frequency fiber laser. Background technique [0002] 1.0μm single-frequency fiber laser has the advantages of low noise, narrow linewidth, good beam quality, high conversion efficiency, etc. It can be used for fiber sensing, laser ranging, high-precision spectroscopy, coherent beam combining, and the generation of coherent blue-green light and Application fields such as deep ultraviolet light source have very important application value. However, due to the relaxation oscillation effect of the fiber laser and the power fluctuation of the pump laser, the fiber laser has high intensity noise near the relaxation oscillation peak (mid-band, 1-2MHz) and low-frequency (0-200kHz). For some applications such as fiber optic sensing, coherent optical communication, and lidar, high-intensity noise restricts the further application of fiber lasers....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/10H01S3/08
CPCH01S3/0675H01S3/08013H01S3/10023
Inventor 杨昌盛徐善辉彭秀林冯洲明杨中民
Owner SOUTH CHINA UNIV OF TECH
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