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Dual-waveband multi-wavelength infrared light parametric oscillator

A parametric oscillator, multi-wavelength technology, applied in the application field of laser technology, can solve the problem of not being able to output multiple wavelengths at the same time, and achieve the effect of outstanding substantive characteristics

Inactive Publication Date: 2015-02-18
北京华宇德信光电技术有限公司
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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 provide a technical solution for a dual-band multi-wavelength infrared parametric oscillator for the deficiencies in the prior art. Two pairs or even three pairs of parametric light can meet the phase matching conditions at the same time, so as to realize dual-band multi-wavelength laser output, and solve the problem that a single OPO system cannot output multiple wavelengths at the same time

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  • Dual-waveband multi-wavelength infrared light parametric oscillator

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specific Embodiment approach 1

[0017] The pumped laser gain module 2 uses an 808nm side-pumped Nd-doped solid-state laser, and the output wavelength is mainly composed of Nd ions 4 f 3 / 2 - 4 I 11 / 2 with 4 f 3 / 2 - 4 I 13 / 2 Two energy level transitions are produced, generally 1 μm and 1.3 μm. Including the following lasers and output wavelengths: Nd:YAG simultaneously outputs 1319nm and 1338nm; Nd:YAG simultaneously outputs 1064nm and 1319nm; Nd:YAG simultaneously outputs 1064nm, 1319nm and 1338nm; Nd:YVO 4 Simultaneously output 1064nm and 1342nm; Nd:GdVO 4 Simultaneously output 1064nm and 1342nm; Nd:YAP simultaneously output 1079nm and 1341nm; Nd:YLF simultaneously output 1047nm and 1053nm; Nd:KGW simultaneously output 1067nm and 1351nm, etc. The Q switch adopts 1μm and 1.3μm acousto-optic Q switches, which can realize 1μm and 1.3μm dual-wavelength or multi-wavelength pulsed laser output. The total reflection mirror 1 has high reflectivity for 1 μm and 1.3 μm lasers, and the output mirror 3 is parti...

specific Embodiment approach 2

[0019] combine figure 1 This embodiment is described. The difference between this embodiment and the first embodiment is that the pump laser gain module 2 does not adopt a side-pumped structure, but an end-pumped structure. After the 808nm LD is coupled out through the optical fiber, the Nd-doped laser gain medium is pumped through the total reflection mirror 1. The total reflection mirror 1 has high reflectivity for 1μm and 1.3μm laser, and high transmittance for 808nm laser.

specific Embodiment approach 3

[0020] combine figure 1 Describe this embodiment, the difference between this embodiment and Embodiment 1 is that the nonlinear crystal 7 adopts PPLT crystal (Periodically Poled Lithium Tantalate, periodically poled lithium tantalate) or PPSLT crystal (Periodically Poled Stoichiometric Lithium Tantalate, periodic pole stoichiometric ratio of lithium tantalate). By designing the polarization period of PPLT or PPSLT crystal (single period, mixed period, sector period, etc.) and operating temperature, the phase matching conditions of two or more pairs of parametric light can be met, and the 1.4-3μm band and 3-5μm can be realized Multi-wavelength bands with simultaneously tunable laser output. The parameters of the coupling lens group 4, the total reflection mirror 1, the OPO output mirror 8, and the OPO total reflection mirror 9 are also changed to meet the phase matching conditions of the OPO.

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Abstract

The invention provides a dual-waveband multi-wavelength infrared light parametric oscillator. According to the technical scheme, the parametric oscillator comprises a pumping source resonant cavity, a coupling and isolating system and an OPO resonant cavity. A laser beam sent from the pumping source resonant cavity penetrates through the coupling and isolating system and the OPO resonant cavity in sequence and then is sent out. A dual-wavelength pumping source, even a three-wavelength pumping source is used for pumping an OPO system, two pairs, even three pairs of parametric light can meet a phase matching condition at the same time, dual-waveband multi-wavelength laser output can be achieved, and the problem that a single OPO system can not output multiple wavelengths at the same time is solved.

Description

technical field [0001] The invention relates to the application field of laser technology, in particular to a dual-band multi-wavelength infrared light parametric oscillator. Background technique [0002] In the prior art, it is known that 1-3 μm and 3-5 μm band lasers have important application value in many fields such as photoelectric countermeasures, atmospheric environment monitoring, medical treatment and spectroscopy research. Optical parametric oscillation technology (OPO) based on frequency conversion is one of the effective ways to generate 1-5μm band infrared laser. [0003] Based on the basic principle of nonlinear process, the optical parametric process needs to meet the phase matching conditions. The current general phase matching methods include angle matching, temperature matching and period matching. No matter which phase matching method is used, when a single wavelength is used for pumping, only a certain pair of wavelengths of parametric light can satisfy...

Claims

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Application Information

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IPC IPC(8): H01S3/16H01S3/108
Inventor 张卫彭跃峰魏星斌罗兴旺聂赞彭珏高剑蓉
Owner 北京华宇德信光电技术有限公司
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