Integrated narrow linewidth external cavity laser structure based on optical lens and optical grating

Abstract

The invention relates to an integrated narrow linewidth external cavity laser structure based on an optical lens and an optical grating. The structure comprises a refrigerator, a heat sink, a transition heat sink, a laser tube core, a thermistor, a cushion block, a grating integrated device, an isolator and a tail fiber, wherein the heat sink is arranged on the refrigerator; the transition heat sink is arranged on one side of the upper surface of the heat sink; the laser tube core is arranged as a light source of the device and is arranged in the middle of the upper surface of the transition heat sink; the thermistor is arranged on the transition heat sink and is located on one side of the laser tube core; the cushion block is of rectangular shape; a V-shaped slot is longitudinally formed in the cushion block; the grating integrated device is located in the V-shaped slot in the cushion block; the above parts are all accommodated in a tube; the isolator is mounted on an outer wall of the tube and is opposite to the grating integrated device in the tube; the tail fiber is connected with the isolator. The narrow linewidth external cavity laser provided by the invention has narrow linewidth, high illuminating efficiency, high stability, high coupling efficiency, simple process and capability of realizing stable narrow linewidth output.

Description

technical field [0001] The present invention relates to the field of narrow-linewidth laser light sources, in particular to the field of fabricating external-cavity lasers to realize narrow-linewidth laser light source structures below 10 kHz, in particular to a narrow-linewidth external-cavity laser structure based on the integration of fiber optic lenses and gratings. Background technique [0002] Narrow-linewidth laser sources have attracted widespread attention since their inception. With the development in recent years, narrow-linewidth lasers play a very important role in the fields of national defense and security, communications, and frontier scientific research. For example, in the military, narrow-linewidth laser light sources can be used as light sources for gyroscopes, laser positioning and ranging, and photoelectric navigation; in long-distance high-speed transmission systems, the coherence length of 3KHz narrow-linewidth laser light sources can reach 100Km, grea...

AI Technical Summary

Problems solved by technology

[0012] The invention provides a narrow-linewidth external cavity laser structure based on the integration of fiber optic lens and grating to solve the problems of traditional narrow-linewidth external cavity lasers, such as wide linewidth, low luminous efficiency, poor stability, low coupling efficiency, and complicated process. Difficult problems to achieve stable narrow linewidth output

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