All-fiberized double-path ring laser

Abstract

An all-fiberized double-path ring laser comprises two ring lasers with the same structure. Each ring laser is characterized in that two ends of a section of rare earth ion doped fiber are respectively connected with an output end of a pumping beam combiner and a second port of a 2*2 fiber beam splitter, and a third port of the 2*2 fiber beam splitter is connected with a second input end of the pumping beam combiner through a fiber so as to form each ring laser. An output end of a pumping source is connected with a first input end of each pumping beam combiner. Fourth ports of the two 2*2 fiber beam splitters of the ring lasers are connected through a fiber. First ports of the two 2*2 fiber beam splitters serve as laser output ends. The all-fiberized double-path ring laser is small in size, stable in structure, free of the requirements for isolators and fiber gratings, low in cost and capable of achieving self-stabilization of an output laser mode and phase locking of the two paths of the lasers without the requirements for active control.

Description

technical field [0001] The invention relates to a fiber laser, in particular to an all-fiber two-way ring laser, so as to realize self-stabilization of output power and longitudinal mode of the two-way ring laser and mutual phase locking. Background technique [0002] In the application of fiber lasers, the requirements for output power, mode stability and phase stability are getting higher and higher. Ordinary ring fiber lasers need to use devices such as isolators or fiber gratings to realize the oscillation and mode selection of the laser, which not only reduces the light output efficiency of the laser, limits the increase in output power, but also increases the complexity of the system, and the output Laser light does not have a definite phase relationship. These shortcomings limit their applications in interferometry, communication, sensing, and materials processing. Contents of the invention [0003] The object of the present invention is to overcome the problems o...

AI Technical Summary

Problems solved by technology

Ordinary ring fiber lasers need to use devices such as isolators or fiber gratings to realize the oscillation and mode selection of the laser, which not only reduces the light output efficiency of the laser, limits the increase in output power, but also increases the complexity of the system, and the output Lasers do not have a definite phase relationship

These shortcomings limit its applications in interferometry, communication, sensing, and materials processing

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