Light path packaging module of narrow-linewidth fiber laser

Abstract

The invention relates to an optical fiber laser packaging structure, in particular to an optical path packaging module of a narrow-linewidth optical fiber laser. The light path packaging module structurally comprises a light path packaging shell and a light path packaging module upper cover which are fixed together through screws, a heat insulation plate and a heat insulation plate upper cover are arranged in the light path packaging shell, and a semiconductor cooler, a phase shift grating packaging structural member and a thermistor are placed between the heat insulation plate and the heat insulation plate upper cover. One side of the heat insulation plate and one side of the heat insulation plate upper cover are provided with wiring channels used for the semiconductor cooler, the phase shift grating packaging structural member and the thermistor, and the side edge portion of the light path packaging shell is provided with a fiber outlet and a fiber inlet. The phase shift grating and the optical device are integrated in the same module by adopting a nested structure, and the phase shift grating is independently packaged in a heat insulation manner, so that the problems of miniaturization and integrated packaging difficulty of a narrow-linewidth optical fiber laser optical fiber path are solved; and meanwhile, the problem of difficulty in packaging and heat insulation of the phase shift grating is solved.

Description

Technical field [0001] The present invention relates to a fiber laser package structure, and more particularly to a narrow line width fiber laser optical path package module. Background technique [0002] Distributed Feedback Fiber Laser (DFB-FL) is a laser formed by a phase shift grating on a doped fiber, which has a small size, light weight, a narrow output laser line, low noise, etc. In the field of fiber optic sensing, it is widely used. DFB-FL production technology is the first to find and produce and produce Western countries such as Europe and the United States. With my country's rapid development of science and technology in China, it has also begun to master the production technology. Most of them have been listened as fiber. The sensing components such as the device are used. As a laser source, it is also a big gap with Western countries. [0003] The existing narrow line width fiber laser displays the optical device, the weld spot is freely or simple, not only occupies...

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Problems solved by technology

[0006] The invention provides a narrow-linewidth fiber laser optical path packaging module, which adopts a nested structure to integrate a phase-shift grating and an optical device into the same module and separately heat-insulates the phase-shift grating to solve the problem of narrow linewidth The problem of miniaturization and integrated packaging of fiber laser fiber optical path; at the same time, it also solves the problem of difficult heat insulation of phase shift grating packaging

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