Tunable narrow-line-width picosecond pulse laser device

Abstract

The invention discloses a tunable narrow-line-width picosecond pulse laser device, comprising a pulse driving circuit, a semiconductor laser device, an annular device, an optical fiber optical grid, a coupling device, a spectrum analysis unit, a main control unit and a micro-spur traction unit, wherein the pulse driving circuit outputs pulse current to drive the semiconductor laser device to generate one-grade relaxation vibration wide spectrum pulse laser; the pulse laser penetrates through the annular device to be reflected by the optical fiber optical grid; then reflected laser output by the annular device enters the coupling device; the reflected laser with the greater energy is output through an output light port of the coupling device; the reflected laser with the smaller energy is output through a feedback light signal port of the coupling device; the reflected laser with the smaller energy is analyzed and processed by the spectrum analysis unit and the main control unit; and the main control unit drives the micro-spur traction unit and the micro-spur traction unit to carry out micro-spur traction on the axial direction of the optical fiber optical grid. The tunable narrow-line-width picosecond pulse laser device has the advantages of simple structure, easiness for operation, good stability, multi-pulse adjustability, high tuning precision and the like.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a picosecond pulse laser with tunable narrow line width. Background technique [0002] At present, pulsed lasers use Q-switching technology and mode-locking technology to realize pulsed laser output. Q-switched lasers can only achieve pulsed lasers with a pulse width of nanoseconds, and can obtain a single pulse energy output of the millijoule level. Due to the wide pulse width, when it interacts with materials, the heat absorption effect is obvious. Mode-locked lasers can achieve picosecond and femtosecond pulse laser output, but their repetition rate is high (above MHz), the frequency adjustable range is narrow, the single pulse energy is low, and the effect on materials is poor. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a tunable narrow-linewidth picosecond pulse laser, which can realize frequency modulation of 1-100MH...

AI Technical Summary

Problems solved by technology

Mode-locked lasers can achieve picosecond and femtosecond pulse laser output, but their repetition rate is high (above MHz), frequency adjustable range is narrow, single pulse energy is low, and the effect on materials is poor

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