Tunable laser system

Abstract

The invention relates to the field of lasers, in particular to a tunable laser system. The tunable laser system comprises a laser, an optical lens group and an optical fiber which are connected in sequence, wherein the laser emits laser light with adjustable wavelength and is emitted into the optical fiber through the optical lens group. The tunable laser system also comprises an optical path adjusting unit and a semiconductor amplifier unit which are arranged on a laser optical path, wherein the optical path adjusting unit comprises an adjusting module and an optical lens; and the semiconductor amplifier unit comprises a semiconductor amplifier, a first coupling lens arranged at the front end of the semiconductor amplifier and a first collimating lens arranged at the back end of the semiconductor amplifier. According to the tunable laser system, by designing the tunable laser system which is darkly tunable, the optical path adjusting unit is arranged on the optical path so as to change the optical path of the laser light, so that the laser emits the laser light with adjustable wavelength to realize dark tuning, the laser light with high interference is avoided from directly being emitted into the optical fiber in the process of realizing laser wavelength tuning, and the tunable laser system is simple in structure and convenient for large-scale production and use.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a dark-tunable tunable laser system. Background technique [0002] Tunable laser refers to a laser that can continuously change the laser output wavelength within a certain range. This kind of laser has a wide range of uses and can be used in spectroscopy, photochemistry, medicine, biology, integrated optics, pollution monitoring, semiconductor material processing, information processing and Communication etc., especially optical communication system, its application is more and more extensive. [0003] There are three ways to achieve laser wavelength tuning. The first is to change the wavelength of the laser by changing the wavelength corresponding to the low loss region of the resonator through some components (such as gratings); the second is to change some external parameters (such as magnetic field , temperature, etc.) to move the energy level of the laser transition; the third is to ...

AI Technical Summary

Problems solved by technology

[0004] However, when the tunable laser receives the channel switching command (to achieve wavelength tuning) and stabilizes the wavelength to the new channel, the laser frequency error emitted by the tunable laser is relatively large, and these emitted lights are extremely harmful to the related systems of the tunable laser. , such as coherent systems

[0005] How to reduce or avoid the relatively large error of the laser frequency emitted by the tunable laser in the process of realizing laser wavelength tuning is one of the main problems that those skilled in the art have always wanted to solve

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