Laer moudle

Abstract

To obtain high reliability in a laser module provided with a semiconductor laser element, an optical fiber, and a convergence optical system which converges a laser beam emitted from the semiconductor laser element and couples with an incident end of the optical fiber. In a laser module, a semiconductor laser element LD, a collimator lens 19, a condenser lens 12, and an optical fiber 13 are arranged in a positional relation where a laser beam B emitted from the semiconductor laser element LD is collimated by the collimator lens 19, condensed by the condenser lens 12, and converged in an incident end. A CAN package 10 is provided as a first package which is hermetically sealed including the semiconductor laser element LD. Moreover, a second package P2 which is hermetically sealed including the incident end of the optical fiber 13 is provided.

Description

field of invention [0001] The present invention relates to a laser module, and more particularly to a laser module including a semiconductor laser element, an optical fiber, and a converging optical system for coupling a laser beam emitted from the semiconductor laser element to one end face of the optical fiber. Background technique [0002] Conventionally, a laser beam emitted from the semiconductor laser element is coupled to the light incident end face of the optical fiber by including a semiconductor laser element housed in a module, one end (light-incident end surface) in a state of entering the inside of the module and fixed to the optical fiber of the module, and The laser module of the condensing optical system is a so-called pigtail type laser module, and is generally known as an optical communication component. [0003] Inside the laser module, in order to stably maintain the state of optical coupling between the semiconductor laser and the light incident end face...

AI Technical Summary

Problems solved by technology

[0013] However, in the case of a laser module in which an optical fiber is fixed to a module including an optical fiber with a primary coating made of a UV curable resin and a secondary coating made of a polymer that are generally sold on the market, the The module is degassed. There is an optical fiber film in the degassing device. During the degassing process, degassed components are generated from the film, and this gas contaminates the inside of the module.

[0014] In order to prevent this contamination, it is considered to remove all coatings of optical fibers in advance, but optical fibers without coatings are easy to break, difficult to handle, and have low practicability

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