Infrared solid laser based on inner cavity optical parametric oscillation and crystal stimulated Raman scattering effect
A solid-state laser and laser crystal technology, which is applied in the direction of laser scattering effect, laser, and laser components, etc., can solve the problems of inability to achieve simultaneous output of multiple wavelengths, immature, and difficult to achieve wide wavelength tuning, etc. Raman light conversion efficiency, simple and compact structure, and the effect of improving Raman gain coefficient
Inactive Publication Date: 2019-05-10
HOHAI UNIV
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Problems solved by technology
However, the technology of method (1) is not very mature and is still in the development stage; method (2) is difficult to achieve wide wavelength tuning through Raman crystal temperature tuning; and method (2) and method (3) cannot achieve wavelength Multi-Wavelength Simultaneous Output in Broadly Tuned NIR and MIR Bands
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[0035] Such as figure 1 , in this embodiment, the coupling lens group is composed of two plano-convex lenses with opposite convex surfaces. By adjusting the parameters of the coupling lens, the size of the pump light spot incident on the crystal in the resonant cavity can be controlled, and the specific adjustment is the prior art.
[0036] In this embodiment, the OPO crystal adopts lithium niobate crystal MgO:PPLN with multi-polarization periods doped with MgO at a concentration of 5 mol%, and the polarization period ranges from 28.5 to 31.5 μm, with a total of 7 periods and a period interval of 0.5 μm. Raman crystals use a Axonally grown BaWO 4 crystal, crystal edge a Shaft cutting, crystal size 4×4×50mm 3， The frequency shift is 925cm -1 .
[0037] The pump source adopts 808 nm semiconductor laser, whose wavelength matches the absorption wavelength of the laser crystal, and the laser crystal 2 adopts Nd:YVO 4Crystal, one end facing the input flat mirror is coated wit...
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The invention discloses a broad tuning multi-wavelength infrared solid laser based on inner cavity optical parametric oscillation and crystal stimulated Raman scattering effect. The broad tuning multi-wavelength infrared solid laser comprises a pump source, a coupling lens group, a resonant cavity, a laser crystal, an OPO crystal and a Raman crystal. The resonant cavity comprises an input flat mirror, a 45-degree flat mirror, a reflection flat mirror and an output concave mirror. The input flat mirror, the 45-degree flat mirror and the reflection flat mirror are set in sequence along a presetstraight line. The output concave mirror is located at a lateral of the preset straight line. Light which is reflected by the reflection flat mirror and is parallel to the preset straight line can bereflected to the output concave mirror by the 45-degree flat mirror at a 45-degree reflection angle. The laser crystal and an acousto-optical Q-switch are set between the input flat mirror and the 45-degree flat mirror. The OPO crystal is set between the 45-degree flat mirror and the reflection mirror. An F-P etalon and the Raman crystal are set between the 45-degree flat mirror and the output concave mirror. Pump laser output by the pump source passes the coupling lens group and is incident into the resonant cavity from the input flat mirror. Through utilization of the infrared solid laser, broad tuning multi-wavelength output of near-infrared first-order Stokes light, signal light and intermediate infrared idler frequency light can be obtained. The infrared solid laser is of all-solid-state design and is compact in structure and high in working stability.
Description
technical field [0001] The invention relates to an infrared solid-state laser with multi-wavelength simultaneous output, in particular to a wide-tunable infrared solid-state laser based on an inner cavity optical parameter oscillation and a crystal-stimulated Raman scattering effect. Background technique [0002] Continuously wide-tuned multi-wavelength infrared lasers have broad application prospects in the fields of biophotonics, spectral analysis, atmospheric monitoring, remote sensing, and electro-optical countermeasures. As a coherent light source, lasers can interfere, blind, or even damage enemy eyes or sensors. With the transfer of missile detection bands to infrared and other long-wave bands and the information fusion of multiple sensors, the tunable infrared laser in the laser directional infrared countermeasure system has become an important aspect of current research. In addition, the 1600-1800nm near-infrared band also covers the absorption spectrum of many i...
Claims
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Login to View More IPC IPC(8): H01S3/30H01S3/16H01S3/117H01S3/081H01S3/00G02F1/35
Inventor 赵家群成萍周晓锋王国栋唐俊刘勇
Owner HOHAI UNIV