Thermally insensitive resonant cavity for all-solid-state mode-locked laser

A mode-locked laser and resonator technology, applied in the field of lasers, can solve the problems affecting the matching of the pumping spot and the oscillating spot, the laser cannot emit light, etc., and achieve the effect of suitable size, suitable size, and satisfying thermal insensitivity conditions.

Inactive Publication Date: 2020-11-10
SHANDONG UNIV OF TECH
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  • Application Information

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Problems solved by technology

If the radius of the laser mode in the cavity changes too much, it will seriously affect the matching of the pump spot

Method used

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  • Thermally insensitive resonant cavity for all-solid-state mode-locked laser
  • Thermally insensitive resonant cavity for all-solid-state mode-locked laser
  • Thermally insensitive resonant cavity for all-solid-state mode-locked laser

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[0015] see figure 1 , in the present invention, the laser crystal selects a-axis cut Nd:YVO 4 , the doping concentration is 0.3% atomic number, and the crystal length is 6mm. The radius of curvature of each cavity mirror is: R 1 =∞, R 2 =1002.73mm, R 3 =1397.26mm, R 4 =136.60mm, R 5 =∞, the spatial distances between the cavity mirrors and laser crystals are: l 1 =1273.32mm, l 21 =851.56mm, l 22 =44.37mm, l 3 =197.23mm, l 4 =116.19mm. Laparoscopic M 2 , M 3 , M 4 The folding half angles at are 5°, 10° and 5°, respectively. Among them, the laparoscopic M 5 is a saturable absorbing mirror, the cavity mirror M 1 is the laser output coupling mirror.

[0016] Laparoscopic M 1 , M 2 , M 3 and M 4 All use K9 glass, cavity mirror M 1 The inner surface (12) is coated with 1064nm high reflection film, M 1 The outer surface (11) is coated with a 1064nm anti-reflection film. Laparoscopic M 3 The outer surface (31) is coated with an 808nm anti-reflection film...

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Abstract

The invention discloses a thermally insensitive resonant cavity for an all-solid-state mode-locked laser. A five-mirror W-shaped cavity with optimized parameters is adopted as the cavity type, when the thermal focal length is 200 mm, the radiuses of oscillation light spots at a crystal, an endoscope M5 and an endoscope M1 on a tangential plane are 306 microns, 101 microns and 429 microns respectively, and the radiuses of oscillation light spots on a sagittal plane are 298 microns, 100 microns and 428 microns respectively; when the thermal focal length of the laser crystal changes from 150mm to250mm, light spots in the resonant cavity change slowly, and the condition of a thermal insensitive resonant cavity is met.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to keeping the light spots at the laser crystal and saturable absorbing mirror at 300mm when the thermal focal length of the laser crystal is changed from 150mm to 250mm. mu m and 100 mu Near m, a five-mirror W-shaped all-solid-state mode-locked resonator exhibiting thermal insensitivity. Background technique [0002] When the all-solid-state laser pumped by the semiconductor laser is working, due to the thermal effect of the crystal, the thermal focal length of the crystal is different under different pump powers, and the stability of the laser resonator and the spot size of the intracavity oscillation laser will also change accordingly. If the radius of the laser mode in the cavity changes too much, it will seriously affect the matching of the pump spot and the oscillation spot, and even exceed the stable region of the resonator, causing the laser to fail to emit light. For all-s...

Claims

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Application Information

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IPC IPC(8): H01S3/08H01S3/098
CPCH01S3/08H01S3/1118
Inventor 韩克祯王国梅张文飞耿雪刘晓娟满忠胜秦华张华年付圣贵
Owner SHANDONG UNIV OF TECH
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