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Passive Q-switched pulsed self frequency doubling green light laser

A self-frequency doubling and pulsed technology, applied in the laser field, can solve the problems of low light damage threshold, complex preparation process, narrow absorption band, etc., and achieve the effects of good optical quality, compact overall structure and low production cost.

Inactive Publication Date: 2019-04-30
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of SESAM is that it has controllable modulation depth and absorption wavelength, but its disadvantages are narrow absorption band, high cost, complicated preparation process, and low optical damage threshold, which limit its application.

Method used

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  • Passive Q-switched pulsed self frequency doubling green light laser
  • Passive Q-switched pulsed self frequency doubling green light laser
  • Passive Q-switched pulsed self frequency doubling green light laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A passively Q-switched pulsed self-frequency doubling green laser, such as figure 1 As shown, it includes a pump source 1, a focusing system 2, a self-frequency doubling laser crystal 3, a saturable absorber 4, and a resonator output mirror 5 placed sequentially along the optical path;

[0054] The self-frequency doubling laser crystal 3 is Nd:YCOB crystal; the length of the light-passing direction of the Nd:YCOB crystal is 10mm, and the cutting direction of the Nd:YCOB crystal is along the 1064nm frequency doubling phase matching direction, and the Nd:YCOB crystal has a type I phase matching The cutting angle is (113°, 37°), and the Nd ion doping concentration of Nd:YCOB crystal is 8at.%;

[0055] The saturable absorber 4 is a two-dimensional material SnSe 2 Prepared film.

[0056] The incident surface of the pump end of the Nd:YCOB crystal is coated with 1055-1095nm and 527-548nm light high reflection, 800-810nm light high transmittance dielectric film, which is use...

Embodiment 2

[0066] A passively Q-switched pulsed self-frequency doubling green laser, such as figure 1 As shown, it includes a pump source 1, a focusing system 2, a self-frequency doubling laser crystal 3, a saturable absorber 4, and a resonator output mirror 5 placed sequentially along the optical path;

[0067] The self-frequency doubling laser crystal 3 is Nd:GdCOB crystal; the length of the Nd:GdCOB crystal in the light direction is 10mm, and the cutting direction of the Nd:GdCOB crystal is along the 1064nm frequency doubling phase matching direction, and the Nd:GdCOB crystal has type I phase matching The cutting angle is (113°, 47°), and the doping concentration of neodymium ions in Nd:GdCOB is 8at.%;

[0068] The saturable absorber 4 is a two-dimensional material SnSe 2 Prepared films.

[0069] The incident surface of the pump end of the Nd:GdCOB crystal is coated with 1055-1095nm and 527-548nm light high reflection, 800-810nm light high transmittance dielectric film, which is use...

Embodiment 3

[0081] A kind of passive Q-switched pulsed self-frequency doubling green laser according to embodiment 1 or 2, such as Figure 4 As shown, the difference is that the saturable absorber 4 is directly arranged on the inner surface of the output mirror 5 of the resonator.

[0082] The saturable absorber 4 is directly arranged on the inner surface of the output mirror 5 of the resonator, which eliminates the optical element of the substrate, further compresses the length of the resonator, reduces the loss in the cavity, and makes the optical path structure more compact. The overall pulsed laser Output performance is better.

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Abstract

The invention relates to a passive Q-switched pulsed self frequency doubling green light laser which comprises a pump source, a self frequency doubling laser crystal, a saturable absorber and a resonant cavity output lens which are orderly arranged along an optical path. The self frequency doubling laser crystal is Nd:YCOB crystal or Nd:GdCOB crystal, the length of a light passing direction is 6 to 15 mm, a cutting direction is a 1064 nm frequency doubling phase matching direction, the doping concentration of strontium ions is 1 to 20 at.%, and the material of the saturable absorber is a two-dimensional material SnSe2. According to a film-like saturable absorber modulated self frequency doubling laser made of the two-dimensional material in the invention, continuous wave self frequency doubling light is converted into pulse self frequency doubling laser with a short pulse width, a high peak power and high repetition frequency. The saturable absorber used in the invention has the advantages of simple preparation process, low production cost, high efficiency and easy assembly, and the produced pulse self frequency doubling laser has the advantages of small volume and good performance, and the large-scale promotion and use are facilitated.

Description

technical field [0001] The invention relates to a passive Q-switched pulsed self-frequency doubling green laser, which belongs to the field of laser technology. Background technique [0002] Passive Q-switching devices with saturable absorption characteristics are key optical components for obtaining large energy, narrow pulse width, and high peak power laser pulses, and have important applications in the fields of pulsed lasers, optical modulation, and optical sensors. [0003] At present, the more common commercial saturable absorbers are Cr:YAG crystal and semiconductor saturable absorber mirror (SESAM for short). Cr:YAG crystals are often used for pulsed laser modulation of near-infrared light due to their good thermal conductivity and high resistance to photodamage threshold, but their narrow absorption band, long ground state relaxation time, high cost, and complicated manufacturing process cannot meet the requirements The modulation needs of broadband, ultrafast lase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/109H01S3/098H01S3/11
CPCH01S3/1095H01S3/1115H01S3/1118
Inventor 王正平孙玉祥于法鹏王新乐王梦霞许心光赵显
Owner SHANDONG UNIV
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