Ultra-Narrow Linewidth Lasers

A technology of ultra-narrow line width and laser, which is applied to the device for controlling the output parameters of the laser, the coupling of the optical waveguide, etc. It can solve the problems such as the difficulty in realizing the laser single longitudinal mode output, achieve high side mode suppression ratio, and improve side mode suppression Ratio, the effect of compressing the laser line width

Active Publication Date: 2019-09-17
CHONGQING UNIV
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Problems solved by technology

[0004] The invention provides an ultra-narrow linewidth laser to solve the problem that it is difficult to realize laser single longitudinal mode output while further compressing the linewidth existing in the current optical self-injection feedback linewidth compression method

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  • Ultra-Narrow Linewidth Lasers
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  • Ultra-Narrow Linewidth Lasers

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Embodiment Construction

[0026] 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.

[0027] 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.

[0028] see figure 1 , is a ...

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Abstract

The invention provides an ultra-narrow line width laser device. The laser device comprises a laser-generating gain device, an optical coupler, and two feedback compression devices, wherein the laser-generating gain device is connected to the one end of the optical coupler, and the other end of the optical coupler is connected with output optical fibers and the feedback compression devices. By designing cavity lengths and a cavity length difference value of the feedback compression devices, single longitudinal mode narrow line-width laser output is obtained, and a side-mode suppression ratio of output lasers is improved; generated lasers of preset quantity are transmitted to the optical coupler by the laser-generating gain device, and the lasers are transmitted to the corresponding feedback compression devices by the optical coupler; each feedback compression device narrows incident layer line width, and the narrowed laser line width is transmitted back to the laser-generating gain device by the optical coupler to be subjected to gain amplification; after gain amplification, the lasers go through the optical coupler and is transmitted to the feedback compression devices to circularly narrow the laser line width till the lasers of preset quantity are all transmitted out through the output optical fibers.

Description

technical field [0001] The invention belongs to the field of laser generating devices, and in particular relates to an ultra-narrow linewidth laser. Background technique [0002] The single longitudinal mode laser beam with narrow linewidth is a high-quality laser with extremely low phase noise and ultra-long coherence length, and has broad application prospects in the fields of optical fiber sensing, optical fiber communication, lidar, and distributed oil pipeline detection. . As we all know, single longitudinal mode lasers have been widely used in many fields due to their small size, mature production technology, and low cost. However, their linewidth limits their application in optical fiber distributed sensing, optical coherent communication, laser radar, etc. The application of optical coherent systems (especially DFB lasers, whose linewidth is generally on the order of MHz or hundreds of kHz), because the performance parameters of these optical coherent systems, such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/06G02B6/42
Inventor 朱涛黄仕宏
Owner CHONGQING UNIV
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