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Dual-mode switchable output mid-infrared light parametric oscillator

An optical parametric oscillator and parametric oscillator technology, applied in the laser field, can solve problems such as single output mode, and achieve the effect of reducing development cost and simple and compact overall structure

Active Publication Date: 2021-01-15
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the output mode of the existing mid-infrared band optical parametric oscillator is single, and to provide a mid-infrared optical parametric oscillator with dual-mode switchable output

Method used

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  • Dual-mode switchable output mid-infrared light parametric oscillator

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specific Embodiment approach 1

[0015] Specific implementation mode one: the following combination figure 1 Explain that this embodiment is a dual-mode switchable output mid-infrared optical parametric oscillator, which includes a pump optical coupling system and a T-shaped cavity-pumped optical parametric oscillator;

[0016] The pump light coupling system is composed of doped Tm 3+ pump source 1, pump light half-wave plate 2, polarizing beam splitter 3, first focusing assembly 4, second focusing assembly 5, first pump light total reflection mirror 6 and second pump light total reflection mirror 7 Composition; the first focusing assembly 4 and the second focusing assembly 5 are both composed of plano-convex lens convex surfaces facing each other;

[0017] The T-type inner cavity pumping optical parametric oscillator consists of a first fundamental frequency optical total mirror 8, a second fundamental frequency optical total mirror 9, a first gain medium 10, a second gain medium 11, a first cavity Inner l...

specific Embodiment approach 2

[0035] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the Tm-doped 3+ The pump source 1 is Tm doped with continuous operation and polarized output 3+ Tm-doped solid-state laser or continuous operation, polarized output 3+ For a fiber laser, the energy band transition corresponding to the pump light wavelength is 3 f 4 → 3 h 6 . Others are the same as in the first embodiment.

[0036] The energy band transitions corresponding to the emission wavelengths of the first gain medium 10 and the second gain medium 11 are 5 I 7 → 5 I 8 ; The absorption lines of the first gain medium 10 and the second gain medium 11 match the wavelength of the pump light.

specific Embodiment approach 3

[0037] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the pump light half-wave plate 2 is a polarization device made of uniaxial crystal, and the light passing direction is perpendicular to the uniaxial crystal. Axis; one side of the polarized beam splitter 3 is coated with a high-reflection film for S-polarized pump light and an anti-reflection film for P-polarized pump light, and the other side is coated with an anti-reflection film for P-polarized pump light. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a dual-mode switchable output mid-infrared optical parametric oscillator, belongs to the technical field of a laser, and solves a problem of a single output mode of an existingmid-infrared band light parametric oscillator. The dual-mode switchable output mid-infrared light parametric oscillator comprises a pump light coupling system and a T-shaped inner cavity pumping typelight parametric oscillator. The pump light coupling system is composed of a pump source doped with Tm<3+>, a pump light half-wave plate, a polarizing beam splitter, a first focusing assembly, a second focusing assembly, a first pump light total reflection mirror and a second pump light total reflection mirror. The T-shaped inner cavity pumping type light parametric oscillator is composed of a first fundamental frequency light total reflection mirror, a second fundamental frequency light total reflection mirror, a first gain medium, a second gain medium, a first intra-cavity lens, a second intra-cavity lens, a second dichroic mirror, a first dichroic mirror, an acousto-optic Q switch, a fundamental frequency light half-wave plate, a parametric light total reflection mirror, a nonlinear crystal and an output mirror. The invention is used for the dual-mode switchable output mid-infrared light parametric oscillator.

Description

technical field [0001] The invention belongs to the field of laser technology. Background technique [0002] 3μm~14μm belongs to the mid-infrared band in the spectrum, covering multiple atmospheric transparent windows and being in the "fingerprint identification area" of many gas molecules. Environmental protection and other fields have important application value. At present, the device that can realize the full coverage of laser in this band is mainly the optical parametric oscillator (OPO). Laser output, because the generation of the laser does not depend on the energy level transition of the doped ions in the gain medium, the OPO technology can be used to develop a mid-infrared laser source with high flexibility and various working modes, which can meet the laser parameters of this band in different fields different needs. [0003] The output characteristics of the optical parametric oscillator mainly depend on the nonlinear crystal and its pump source. At present, th...

Claims

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Application Information

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IPC IPC(8): H01S3/094H01S3/108H01S3/117H01S3/16
CPCH01S3/094H01S3/108H01S3/117H01S3/163
Inventor 袁晋鹤李佳睿孙建辉
Owner HEILONGJIANG UNIV
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