Anti-return main oscillation power amplification pulse laser

Abstract

The invention relates to an anti-return main oscillation power amplification pulse laser, which sequentially comprises a seed semiconductor laser, a return light processor, a first-stage amplifier, a first-stage return light processor, a second-stage amplifier, a second-stage return light processor,..., an n-stage amplifier and an n-stage return light processor. The return light processors are designed to ensure forward transmission of signal light, prevent reverse transmission of the signal light, prevent reverse transmission of non-linear laser, ASE light and return light outside a light path, and monitor the return light. The laser does not limit the starting time of the Seed LD, can realize continuous adjustment of the pulse width and the frequency, does not need a complex structure and calculation, is low in cost and compact in structure, can process return light of each wave band, effectively protects the laser, and prolongs the service life of the laser.

Description

technical field [0001] The invention relates to a laser technology, in particular to an anti-return main oscillation power amplified pulse laser. Background technique [0002] The MOPA (Master Oscillator Power-Amplifie) structure can obtain high-energy pulsed laser with the same parameters as the seed signal light source (laser spectral wavelength, pulse repetition frequency, and time-domain pulse width, etc.). The seed source of the MOPA laser can choose a directly modulated LD (semiconductor laser), and the Seed LD (seed semiconductor laser) can achieve waveform output with arbitrary pulse width and frequency within a certain range. The signal is amplified by multiple stages to achieve high average power , High single pulse energy and high peak power. Therefore, in fine processing, laser marking, laser cleaning and other fields, MOPA pulsed fiber laser has significant application value. [0003] In order to develop the application field of MOPA pulsed fiber laser, it is ...

AI Technical Summary

Problems solved by technology

However, this method limits the power-on time of the SLD. The pulse width and frequency adjustable range are affected by the length of the delay fiber, and the frequency can only be adjusted in integer multiples of the safe frequency.

In addition, this method requires complex calculations, and the structure of the laser is complex: including delay fibers, broadband filters, isolators and other devices

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