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Longitudinal mode drift compensation device and method for laser

A technology for drift compensation and lasers, applied to the structure/shape of lasers, laser components, and optical resonators, can solve problems such as high cost, complex structure, and high technical requirements, and achieve low cost, complex structure, and technical difficulty low effect

Inactive Publication Date: 2016-07-13
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the prior art, the present invention provides a laser longitudinal mode drift compensation device and method, which can solve the problems of complex structure, high cost and high technical requirements of the longitudinal mode drift compensation system in the prior art, and can improve the laser The long-term drift of the longitudinal mode and the noise of the magnitude above 10MHz are compensated

Method used

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  • Longitudinal mode drift compensation device and method for laser
  • Longitudinal mode drift compensation device and method for laser
  • Longitudinal mode drift compensation device and method for laser

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Effect test

Embodiment 1

[0075] Such as image 3 The laser longitudinal mode drift compensation device shown is specifically a device for long-term stability of the longitudinal mode of the uncoated FP laser with closed-loop control Brewster angle incidence. The device includes: etalon FP1-01, the first Cavity mirror 2-01, second cavity mirror 2-02, third cavity mirror 2-03, wavelength meter 4, central control computer 5, electric turntable and driver 6. It can be seen that the resonant cavity in this embodiment is an annular cavity, and the etalon FP1-01 is an uncoated etalon.

[0076] Specifically, the wavelength meter 4 detects the wavelength of the output laser of the resonator, and the central control computer 5 obtains the longitudinal mode drift of the resonator according to the wavelength of the output laser, and generates a feedback signal to the electric turntable and the motor according to the longitudinal mode drift. The driver 6, the electric turntable and the driver 6 adjust the angle o...

Embodiment 2

[0088] Such as Figure 4 The shown laser longitudinal mode drift compensation device is specifically a closed-loop controlled Brewster angle incident uncoated FP laser injection locking device, which includes: etalon FP1-01, first cavity mirror 2 -01, second cavity mirror 2-02, third cavity mirror 2-03, total reflection mirror 3, wavelength meter 4, central control computer 5, electric turntable and driver 6, monolithic non-planar ring cavity laser 7. Among them, the etalon FP1-01 is an uncoated etalon.

[0089] In this embodiment, the total reflection mirror 3 is used to totally reflect the laser output from the resonator to the wavelength meter 4 .

[0090] Wherein, the thickness of the etalon FP1-01 is less than 1 mm, and the material of the etalon FP1 can be quartz, anhydrous quartz, JGS1, etc.; the etalon FP1-01 in this embodiment uses quartz glass with a thickness of 0.7 mm.

[0091] The size of the etalon FP1-01 is Φ25mm×0.7mm.

[0092] In this embodiment, the first ...

Embodiment 3

[0103] Such as Figure 5 The laser longitudinal mode drift compensation device shown is specifically a device for long-term stability of the longitudinal mode of the laser with a closed-loop control of 0-degree incident FP coated with a high-transparency film. The device includes: etalon FP1-02, the first Cavity mirror 2-01, second cavity mirror 2-02, third cavity mirror 2-03, wavelength meter 4, central control computer 5, electric turntable and driver 6. It can be seen that, in this embodiment, the resonant cavity is a ring cavity, and the incident angle of light in the resonant cavity to the etalon FP1-02 is 0 degree.

[0104] Wherein, etalon FP1-02, preferably, etalon FP1-02 thickness is less than 1mm, and described etalon FP1-02 material can be quartz, anhydrous quartz, JGS1 etc.; The etalon FP1-02 in the present embodiment selects 0.7mm thick quartz glass.

[0105] Wherein, the size of the etalon FP1-02 is Φ25mm×0.7mm; as Figure 5 As shown, the incident angle of the ...

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Abstract

The embodiment provides a longitudinal mode drift compensation device and method for a laser, and the device comprises an etalon arranged in a resonant cavity, a wavelength detection module, a central control system and a controller; the etalon is used for adjusting the light path of the resonant cavity to compensate the longitudinal mode drift of the laser; the wavelength detection module is used for detecting the wavelength of the output laser of the resonant cavity; the central control system is used for obtaining the longitudinal mode drift distance of the resonant cavity according to the wavelength of the output laser and generating a feedback signal according to the longitudinal mode drift distance to the controller; and the controller is used for adjusting the etalon according to the feedback signal. According to the invention, compensation of the longitudinal mode drift of the laser can be realized, the device has low cost and low technical difficulty, the device is easy to manufacture, and the device can compensate the long-term drift of laser longitudinal mode and more than 10 MHz magnitude of noise.

Description

technical field [0001] The invention relates to the technical field of all-solid-state lasers, in particular to a longitudinal mode drift compensation device and method of a laser. Background technique [0002] All-solid-state lasers (DPLs) pumped by laser diodes (LDs) have been widely used due to their high conversion efficiency, compact structure, stable system, long service life, and easy maintenance. The compensation methods for longitudinal mode offset in the prior art mainly include: using the PDH method to collect the set value of the longitudinal mode offset of the laser, and driving the piezoelectric ceramic (PZT), changing the cavity length to compensate for the offset of the longitudinal mode, Excellent wavelength stability can be achieved. [0003] The system used to realize the compensation method for the above-mentioned longitudinal mode shift is relatively complicated, including a laser with stable output as a frequency standard, an electro-optic modulator (E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08
CPCH01S3/08036
Inventor 王志敏王明强张丰丰宗楠张申金杨峰彭钦军许祖彦
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI