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Device for generating mid-infrared laser based on cascade optical difference frequency

An infrared laser and cascading technology, applied in the field of mid-infrared lasers, can solve the problems of single-frequency control to be improved and achieve high optical conversion efficiency

Active Publication Date: 2021-04-16
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since OPO adopts a resonant cavity structure, there is a threshold limit, and for gas detection, its single-frequency control needs to be improved

Method used

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  • Device for generating mid-infrared laser based on cascade optical difference frequency
  • Device for generating mid-infrared laser based on cascade optical difference frequency
  • Device for generating mid-infrared laser based on cascade optical difference frequency

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Embodiment Construction

[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and should not be construed as limiting the protection scope of the present invention. , those skilled in the art can make some non-essential improvements and adjustments based on the contents of the present invention described below. In the present invention, unless otherwise clearly specified and limited, the technical terms used in the present application shall have the usual meanings understood by those skilled in the present invention.

[0028] as attached figure 1 As shown, a device for generating mid-infrared laser light based on cascaded optical difference frequency includes a first pump source 1 and a second pump source 4, an APPLN crystal 12, a PPLN crystal 14, a b...

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Abstract

The invention provides a device for generating mid-infrared laser based on cascade optical difference frequency. First pump light emitted from a first pump source enters a beam combiner; second pump light emitted from a second pump source passes through a phase delay system and then enters the beam combiner; the first pump light and the second pump light are combined into a beam of frequency-mixed light in the beam combiner; the frequency-mixed light passes through a telescope system and then enters an APPLN crystal, and cascaded light is generated through the cascade optical difference frequency effect; and the cascaded light is incident into a PPLN crystal, and mid-infrared laser is generated under the action of cascade optical difference frequency. By setting the polarization periods of the APPLN crystal and the PPLN crystal, the energy of the cascaded light of each stage can be gathered in the mid-infrared laser, and the optical conversion efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of mid-infrared lasers, in particular to a mid-infrared laser light source based on cascaded difference frequency. Background technique [0002] The 3-5 μm mid-infrared band laser is located in the atmospheric window area, the thermal radiation energy concentration area of ​​high-temperature objects, and the strong absorption area of ​​water molecules. It has very important applications in the fields of remote sensing detection, photoelectric countermeasures, and medical diagnosis. Compared with ordinary single-peak mid-infrared lasers with fixed wavelengths, multi-peak, broad-spectrum and wide-tunable mid-infrared lasers have more important applications in some special occasions, such as terahertz generation, CARS spectral temperature measurement technology, coherent pulse synthesis, Quantum optics, synchronous detection of multi-component gases, etc. Therefore, the spectrum control technology of mid-infrar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/00
CPCY02A90/10
Inventor 刘文锴李忠洋胡青峰邴丕彬颜钤泽张格格焦彬哲赵佳
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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