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A Method for Suppressing Intensity Noise of High Power Continuous Wave Single Frequency Laser

An intensity noise and laser technology, applied in the field of lasers, can solve the problems of no effect of intensity noise and poor long-term power stability of lasers, and achieve the effect of reducing costs

Active Publication Date: 2021-05-14
SHANXI UNIV
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Problems solved by technology

This method has little effect on the intensity noise at the laser relaxation oscillation frequency, and even introduces additional thermal noise at two-order Hertz frequencies
[0007] Although the self-injection locking technology can effectively suppress the relaxation oscillation of the laser and the intensity noise at high frequencies, the long-term power stability of the laser will be poor due to the use of the composite cavity structure, especially in the case of all-solid-state lasers. Autonomous injection into the locking system
[0008] By introducing nonlinear loss in the resonator to change the dynamic process of the laser, the intensity noise at the relaxation oscillation of the laser can be effectively suppressed, but this method has little effect on the intensity noise at the high frequency of the laser (laser shot noise benchmark)

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  • A Method for Suppressing Intensity Noise of High Power Continuous Wave Single Frequency Laser
  • A Method for Suppressing Intensity Noise of High Power Continuous Wave Single Frequency Laser
  • A Method for Suppressing Intensity Noise of High Power Continuous Wave Single Frequency Laser

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Embodiment Construction

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] The method for suppressing the intensity noise of a high-power continuous wave single-frequency laser of the present invention comprises steps:

[0031] Acquisition of the Intensity-Noise Spectrum of a High-Power CW Single-Frequency Laser , output coupled vacuum noise , the noise caused by intracavity losses , the noise from the pump source , the noise caused by spontaneous emission , the noise caused by dipole fluctuations , the intensity-noise spectrum of a high-power continuous-wave single-frequency laser is expressed by formula (1):

[0032] (1)

[0033] in, are about the output coupled vacuum noise , noise caused by intracavity losses , the noise from the pump source , the noise caused...

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Abstract

The invention relates to a method for suppressing the intensity noise of a high-power continuous-wave single-frequency laser, by adjusting the length of the laser resonant cavity of the high-power continuous-wave single-frequency laser, inserting a nonlinear crystal into the cavity to introduce nonlinear loss, and the material and length of the gain medium , doping concentration, to change the intensity noise spectrum that suppresses high-power continuous wave single-frequency lasers. Through the present invention, there is no need to adopt methods such as mode locking, electro-optic feedback control, mode cleaner or cascade mode cleaning, self-injection locking, etc., and no external additional instruments are needed, which effectively reduces the cost and does not introduce additional noise into the laser system middle.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a method for suppressing the intensity noise of a high-power continuous wave single-frequency laser. Background technique [0002] Laser has the characteristics of extremely small divergence, high brightness, good monochromaticity, and good coherence. It has been used in many fields of people's production and life since its inception. With the development of the times, in some emerging disciplines such as quantum optics and quantum information, precision measurement, atomic cooling and capture, gravitational wave detection and other fields, people put forward higher requirements for the beam quality of lasers. At the same time, it has low intensity noise. [0003] At present, a variety of laser intensity noise suppression technologies have been developed, such as seed light injection locking technology, photoelectric positive and negative feedback technology, mode cleaning or cas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/11
CPCH01S3/067H01S3/1121
Inventor 卢华东郭永瑞苏静彭堃墀
Owner SHANXI UNIV
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