Full positive dispersion and full polarization maintaining optical fiber laser

Abstract

The invention discloses a full positive dispersion and full polarization maintaining optical fiber laser. The full positive dispersion and full polarization maintaining optical fiber laser comprises a first optical fiber coupling Faraday polarization rotating mirror, a ytterbium-doped fiber, a wavelength division multiplexer, a pump light isolator, a semiconductor laser LD, a polarization maintaining optical fiber coupling polarization beam splitter, a polarization maintaining optical fiber coupling total reflecting mirror, a polarization maintaining optical fiber coupler, a polarization maintaining single-mode fiber, a second optical fiber coupling Faraday polarization rotating mirror and a narrow-linewidth band-pass filter. Through the design of a cavity structure, when laser pulse has a single round trip in an optical fiber laser cavity, the laser pulse is amplified multiple times, pulse gains are increased, and the single pulse energy of output light pulse is higher. Through the optical fiber coupling Faraday polarization rotating mirrors at the two ends of a standing wave cavity, the whole optical fiber laser cavity compensates the linear noise and disturbance caused by the environment and is not influenced by the outside. The full positive dispersion and full polarization maintaining optical fiber laser is simple in structure, easy to debug and small in environment interference, and has broad application prospects in the industrial field.

Description

technical field [0001] The invention relates to the field of ultrafast laser technology, in particular to a fully positive dispersion and fully polarization-maintaining optical fiber laser adopting a standing wave cavity structure and an all-polarization-maintaining optical fiber. Background technique [0002] Compared with traditional solid-state lasers, fiber lasers have the advantages of compact structure, no adjustment, easy maintenance, low loss, and good beam quality. They are widely used in material fine processing, ultrafast optics, time-frequency domain laser precision control, and optical communications. field. In recent years, with the rapid development of fiber mode-locking technology, through the reasonable application balance of fiber laser intracavity dispersion management and intracavity nonlinear effects, fiber lasers have achieved better performance in terms of single pulse energy, pulse width and long-term stability output. improvement. [0003] In di...

AI Technical Summary

Problems solved by technology

While introducing these dispersion blocks, the all-fiber nature of the fiber laser is destroyed, thus increasing the difficulty of mode-locking adjustment of the fiber laser

Moreover, such fiber lasers are affected by environmental noise and temperature changes, which will directly lead to the instability of the mode-locked state of the fiber laser.

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