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Optical fiber gas cascaded Raman laser capable of realizing 3-5-micron band tuning

A Raman laser and Raman laser technology, applied in the field of lasers, can solve the problem of low Raman conversion efficiency, achieve high Raman conversion efficiency, low loss, and improve conversion efficiency

Active Publication Date: 2017-01-04
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0008] In the prior art, the use of solid Raman media to achieve mid-infrared output requires many stages of Raman frequency conversion, resulting in low Raman conversion efficiency.

Method used

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  • Optical fiber gas cascaded Raman laser capable of realizing 3-5-micron band tuning
  • Optical fiber gas cascaded Raman laser capable of realizing 3-5-micron band tuning
  • Optical fiber gas cascaded Raman laser capable of realizing 3-5-micron band tuning

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specific Embodiment approach

[0043] As shown in Figure 3(a), a fiber gas cascade Raman laser that can be tuned in the 3-5 μm band includes a pump laser 300, a first-stage Raman laser generator and a second-stage Raman laser generator , wherein both the first-stage Raman laser generating device and the second-stage Raman laser generating device are ring-cavity feedback structure laser generating devices. The first-stage gas Raman laser generating device converts the 1 μm pump laser 301 generated by the pump laser 300 into the first-stage Raman scattered laser 320, and the first-stage Raman scattered laser 320 is in the 1.5 μm or 2 μm wave band laser. The first-level Raman scattering laser 320 is used as the pumping laser of the second-level Raman laser generating device. The first-stage Raman laser generating device includes a first high reflection mirror 302, a second high reflection mirror 303, a first half-wave plate 304, a 1# polarizing beam splitter prism 305, a second half-wave plate 306, 1# coupli...

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Abstract

The invention provides an optical fiber gas cascaded Raman laser capable of realizing 3-5-micron band tuning. The laser comprises a 1-micron band tunable Raman pump source, a first level gas Raman laser generation device and a second level gas Raman laser generation device, the first level gas Raman laser generation device converts 1-micron pump laser generated by the 1-micron band tunable Raman pump source into first level Raman scattering laser, and the first level Raman scattering laser is laser of 1.5-micron band or 2-micron band; and the second level gas Raman laser generation device converts the first level Raman scattering laser into second level Raman scattering laser, and the second level Raman scattering laser is 3-5-micron band tunable mid-infrared laser. According to the optical fiber gas cascaded Raman laser provided by the invention, the output of 3-5-micron band tunable mid-infrared laser is realized in an anti-resonant hollow fiber with a negative curvature by employing a gas Raman cascading manner for the first time.

Description

technical field [0001] The invention belongs to the technical field of lasers, and relates to a novel laser capable of generating 3-5 μm band tuned mid-infrared laser output based on the gas cascade stimulated Raman scattering effect in a hollow-core optical fiber. Background technique [0002] Because its wavelength is in the atmospheric transmission window, mid-infrared lasers in the 3-5 μm band are suitable for long-distance transmission in the atmosphere. Therefore, they have important application values ​​in military fields such as infrared countermeasures and lidar, as well as civilian technical fields such as laser spectrum experiments and atmospheric environment monitoring. , has always been a hot spot of international research. [0003] At present, the traditional technical means to obtain mid-infrared laser mainly include gas molecular absorption transition and nonlinear frequency conversion technology. [0004] Chemical lasers use the over-frequency absorption an...

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Application Information

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IPC IPC(8): H01S3/30H01S3/067H01S3/091
CPCH01S3/067H01S3/091H01S3/302H01S3/305
Inventor 王泽锋陈育斌顾博陈子伦曹涧秋奚小明许晓军司磊陈金宝
Owner NAT UNIV OF DEFENSE TECH
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