Single longitudinal mode multi-wavelength tunable laser system and method capable of improving wavelength output efficiency

Abstract

The invention discloses a single longitudinal mode multi-wavelength tunable laser system and method capable of improving wavelength output efficiency. A tunable laser is connected with a first port ofa front coupler, the front coupler is connected with a public port of a wavelength division multiplexer by virtue of a fourth port, an input terminal of the wavelength division multiplexer is connected with a pumping source, the wavelength division multiplexer is connected with an erbium-doped optical fiber by virtue of an output terminal, the erbium-doped optical fiber is connected with a firstport of a circulator, the circulator is connected with a tapering optical fiber by virtue of a second port, the tapering optical fiber is connected with a Faraday reflecting mirror, a third port of the circulator is connected with a fourth port of a rear coupler, a third port of the rear coupler is connected with a first port to form a sub cavity, and a second port of the rear coupler is connectedwith a second port of the front coupler. The system disclosed by the invention is simple in structure, and output wavelength effect is obviously improved.

Description

technical field [0001] The invention belongs to the field of electronic information technology, relates to the field of lasers, in particular to a single longitudinal mode multi-wavelength tunable laser system and method for improving wavelength output efficiency. Background technique [0002] Tunable multi-wavelength single longitudinal mode fiber laser has broad application prospects in optical communication, sensing, precision measurement and other fields due to its advantages of tunable wavelength and narrow linewidth. At present, how to simultaneously realize multi-wavelength, narrow linewidth and tunable performance indicators is one of the hot research issues in this field. [0003] In recent years, fiber lasers have developed rapidly. With their unique advantages, high power, compact structure, and good beam quality have become research hotspots in the field of new laser technology, especially tunable multi-wavelength fiber lasers. Laser, this type of fiber laser pl...

AI Technical Summary

Problems solved by technology

However, the long cavity length will lead to multiple longitudinal modes and the central wavelength of the output laser is affected by the free oscillation cavity mode in the cavity, the signal-to-noise ratio is low, and only a single wavelength can be output. The system structure is cumbersome and expensive, and it is not easy to industrialize

The patent application "Single longitudinal mode multi-wavelength broadband tunable Brillouin laser generation method and Brillouin laser" (publication number: CN 104617472 A) reported that a 10-meter-long single-mode fiber was used as a gain fiber to generate multi-wavelength Brillouin laser Brillouin-Stokes light, but less Brillouin-Stokes light due to 10 meters of single-mode fiber

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