Common output mirror thulium and holmium co-doped yttrium lithium fluoride single-frequency pulse laser for master and slave laser purpose

Abstract

The invention provides a common output mirror thulium and holmium co-doped yttrium lithium fluoride single-frequency pulse laser for master and slave laser purpose. The output of a laser diode (1) runs through a coupled lens group (2) and enters a laser crystal (4) through a flat concave mirror (3), wherein the flat concave mirror (3) and a plane output mirror (7) form a main resonant cavity and two fixed etalons (5, 6) are inserted into the resonant cavity; and the outputs of laser diodes (13, 19) run through coupled lens groups (14, 18) and then focus in a laser crystal (16) through two plane mirrors (15, 17). The resonant cavity of the slave laser consists of a flat concave mirror (10) and plane mirrors (7, 15, 17), wherein an isolator (11) and a half-wave plate (12) is added in the resonant cavity. The master and slave lasers of the invention commonly use an output mirror so that single-frequency seed light output by the master laser is completely poured into an annular cavity of the slave laser. The common output mirror thulium and holmium co-doped yttrium lithium fluoride single-frequency pulse laser for master and slave laser purpose realizes the highly efficient pouring of the seed light and finally guarantees the seed light is output from the single-frequency pulse of the laser.

Description

technical field [0001] The invention relates to a device in the field of laser technology, in particular to a 2μm Tm, Ho:YLF single-frequency pulse laser for injecting seed light into a shared output mirror of a laser diode end-pumped master-slave laser. Background technique [0002] Injection locking refers to the phenomenon that a weak laser beam with excellent performance is used to control the spectral characteristics, mode phase characteristics and spatial characteristics of a strong laser output beam. A low-power laser can insert a spectrally selective element in the cavity to compress the linewidth, thereby obtaining laser with narrow linewidth, single-mode operation, and stable frequency; while high-power lasers tend to have wider linewidth, multi-mode operation, and different frequencies. Stable, using injection locking technology, a low-power laser can control a high-power laser, so as to obtain high-power output with narrow linewidth and single longitudinal mode. ...

AI Technical Summary

Problems solved by technology

[0003] In the past injection-locked lasers, the master laser and the slave laser are two independent lasers. In order to prevent the seed light from feeding back into the cavity of the master laser, the seed light must pass through the isolator and be injected into the cavity of the slave laser by the output mirror of the slave laser. , since the output mirror of the slave laser is partially transmitted to the seed light, only part of the seed light can enter the resonant cavity of the slave laser through the output mirror of the slave laser, so the injection efficiency must be reduced

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