Air-spaced Fabry-Perot etalon and solid laser with same

Abstract

The invention relates to the field of laser techniques and particularly relates to an air-spaced Fabry-Perot etalon and an infrared single-frequency solid laser with the same, wherein the end surface of the laser diode of the infrared single-frequency solid laser is pumped with thulium yttrium lithium fluoride (Tm: YLF) and the cavity of the laser diode is pumped with chromium zinc sulfide (Cr: ZnS) in an enhancing way. The air-spaced Fabry-Perot etalon consists of a Tm: YLF laser crystal, a Cr: ZnS laser crystal and an air layer which is sandwiched between the output end surface of the Tm: the YLF laser crystal and the input end surface of the Cr: the ZnS laser crystal. The infrared single-frequency solid laser with the air-spaced Fabry-Perot etalon consists of an optical fiber coupling laser diode with output wavelength being 792nm, a coupling lens group, a plane input lens, the air-spaced Fabry-Perot etalon and a planoconcave output lens. The solid laser with the air-spaced Fabry-Perot etalon has the advantages of simple and compact structure, low cost, high output efficiency and the like.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an air faber etalon and a laser diode end-pumped thulium ytterbium lithium fluoride (Tm:YLF) cavity enhanced pumping chromium zinc sulfide with the air faber etalon (Cr:ZnS) infrared single-frequency solid-state laser. Background technique [0002] The output wavelength of Cr:ZnS laser is in the safe band for human eyes, and it has important application prospects in the fields of gas detection, remote sensing, communication, ophthalmology, and neurosurgery. Cr:ZnS laser crystal has excellent thermomechanical properties, high thermal conductivity and wide wavelength tuning range, which makes it the preferred material for generating 2-3μm infrared laser. [0003] At present, 2-3 μm Cr lasers have appeared. The pump sources used by these Cr lasers are generally Er fiber lasers with an output wavelength of 1.6 μm, Tm fiber lasers with an output wavelength of 1.9 μm, and Tm-doped soli...

AI Technical Summary

Problems solved by technology

In order to make up for the low absorptivity of the Cr laser crystal to the above pump light, a multi-pass pumping method can also be used, even if the pump light passes through the Cr:ZnS laser crystal many times, increasing the Cr:ZnS laser crystal to the pump light However, compared with the intracavity enhanced pumping method, the aforementioned pumping method has the disadvantages of complex structure, large volume and low efficiency.

In general, in order to realize the single-frequency output of the Cr laser, it is necessary to add a frequency-selective device in the laser resonator, which further increases the complexity of the laser structure and the production cost.

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