Control method and control device for single-mode stability of laser

A stability control and laser technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of poor single-mode stability of lasers, and achieve the effects of improving control accuracy, improving stability, and suppressing side modes

Inactive Publication Date: 2017-02-22
THE 44TH INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

[0005] The invention provides a laser single-mode stability control device and

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  • Control method and control device for single-mode stability of laser
  • Control method and control device for single-mode stability of laser
  • Control method and control device for single-mode stability of laser

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Embodiment Construction

[0034] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0035] In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be Directly connected or indirectly connected through an intermediary, those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0036] see image 3 , is a ...

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Abstract

The invention provides a control device and a control method for the single-mode stability of a laser. The control device comprises the laser, a photoelectric detector, a detector and a control circuit, wherein the photoelectric detector is used for detecting a laser signal generated by the laser and performing frequency beating on a main mode and a side mode in the laser signal to generate a frequency beating signal; the detector is used for measuring the power of the frequency beating signal, and transmitting a level signal corresponding to the frequency beating signal in power to the control circuit; the control circuit is used for adjusting driving current of the laser according to the level signal until the level signal reaches a preset threshold range. According to the control device and the control method provided by the invention, the laser is enabled to always work in a better single-mode state, the side mode is suppressed, and the phenomena of coexistence of dual modes and mode hopping are eliminated, thereby improving the stability of single-mode working of the laser.

Description

technical field [0001] The invention belongs to the field of laser control, and in particular relates to a laser single-mode stability control device and method. Background technique [0002] The external-cavity narrow-linewidth laser has a very narrow spectral linewidth and is a highly coherent light source. Due to the low phase noise and good single-frequency performance of this laser, it is widely used in coherent optical communication, optical fiber sensing, laser radar, There are important applications in remote sensing, optical metrology and other fields. [0003] The external-cavity narrow-linewidth laser consists of a chip (or medium) capable of generating optical gain and an external-cavity reflector with wavelength-selective properties, which together form a resonant cavity. When the laser is working, theoretically there are multiple cavity modes, but only the mode closest to the reflection peak of the external cavity reflector is excited due to the minimum thresh...

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Application Information

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IPC IPC(8): H01S3/13
CPCH01S3/1305H01S3/131
Inventor 王皓孙力军蒋城
Owner THE 44TH INST OF CHINA ELECTRONICS TECH GROUP CORP
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