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Fiber laser intensity noise suppressing device and working method thereof

A fiber laser and intensity noise technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of increasing the system noise floor, affecting detection accuracy and sensitivity, and achieving the effect of suppressing intensity noise

Inactive Publication Date: 2015-11-18
SOUTH CHINA UNIV OF TECH
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  • Abstract
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Problems solved by technology

For example, in high-precision sensing, the fluctuation of laser output power will increase the noise floor of the system, thereby affecting the detection accuracy and sensitivity

Method used

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  • Fiber laser intensity noise suppressing device and working method thereof
  • Fiber laser intensity noise suppressing device and working method thereof
  • Fiber laser intensity noise suppressing device and working method thereof

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Embodiment

[0025] Figure 1-Figure 4 It is a schematic structural diagram of a device for suppressing intensity noise of a fiber laser according to an embodiment of the present invention. Among them, the pump light output by the single-mode semiconductor pumping light source 1 pumps the fiber resonator 3 through the wavelength division multiplexer 2, and the laser signal generated by the fiber resonator 3 is transmitted from the signal end of the wavelength division multiplexer 2 to Fiber coupler 4, wherein the large end of fiber coupler 4 is output as laser through fiber isolator 5, while the small end of fiber coupler 4 is transmitted to port 3 through port 2 of fiber optic circulator 6, and then through fiber isolator 7 Enter the laser intensity noise suppression device 8 for intensity noise suppression processing, and finally connect to port 1 of the fiber optic circulator 6, and inject it into the fiber resonator 3 after passing through the fiber coupler 4 and the wavelength divisio...

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Abstract

The invention provides a fiber laser intensity noise suppressing device and a working method thereof. The device comprises a single mode semiconductor pump light source, a wavelength division multiplexer, a fiber resonator, a fiber coupler, a fiber isolator, a fiber circulator and a laser intensity noise suppressing device. Through a self-injection locking structure of a fiber laser, laser signals are injected into the fiber resonator after conventional intensity noise suppressing treatment, so that the finally output laser intensity noise is greatly reduced. The device with a relatively simple structure can realize high performance fiber laser output with ultralow intensity noise, thereby being of great importance for expansion of the application of fiber lasers in the field of high-precision optical fiber sensing, coherent light communication and atomic and molecular spectroscopy.

Description

technical field [0001] The invention relates to the technical field of intensity noise suppression of lasers, in particular to a device for suppressing intensity noise of fiber lasers and a working method thereof. Background technique [0002] Due to its low pumping threshold power, high conversion efficiency, wide tunable range, high coupling efficiency (fully compatible with existing optical fiber communication systems and optical fiber sensing systems), compact structure, etc. Communication systems, high-precision sensing technology and high-power laser processing have broad application prospects and great application value. As an important indicator of fiber laser, intensity noise is a key factor restricting its further application. For example, in high-precision sensing, the fluctuation of laser output power will increase the noise floor of the system, thereby affecting the detection accuracy and sensitivity. Therefore, it is of great significance to analyze and stu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H01S3/067
Inventor 徐善辉李灿杨中民冯洲明
Owner SOUTH CHINA UNIV OF TECH
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