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Integral optical resonant cavity for frequency conversion

An optical resonant cavity and frequency conversion technology, applied in the field of optical resonant cavity, can solve problems such as the reduction of nonlinear conversion efficiency in the process of optical frequency conversion, affecting the nonlinear conversion efficiency of optical frequency conversion, and failing to meet the best phase matching conditions, etc., to achieve Improved cavity length stability, high nonlinear conversion efficiency, and simple structure

Active Publication Date: 2020-12-25
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the above scheme, the optical cavity mirror and the nonlinear crystal are placed separately and independently, and the whole device is sensitive to the interference of the external environment, thus affecting the nonlinear conversion efficiency of the optical frequency conversion process
For example, external mechanical vibration, air flow, and temperature changes will cause changes in the relative phase between the two optical fields in the optical resonant cavity, which does not meet the optimal phase matching conditions; and these factors will also cause changes in the length of the optical resonant cavity. Variations that cause pattern matching
It is also impossible to effectively keep the cleanliness of optical components with separate optical component devices, and optical cavity mirrors and nonlinear crystals polluted by external dust will increase the loss of the entire resonant cavity
The above factors will lead to a significant reduction in the nonlinear conversion efficiency of the optical frequency conversion process.

Method used

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  • Integral optical resonant cavity for frequency conversion
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  • Integral optical resonant cavity for frequency conversion

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Embodiment 1

[0056] like Figure 13As shown, the device of the integral optical resonant cavity for frequency conversion in this embodiment is used for optical frequency doubling process to generate frequency doubled light. The experimental device includes a shell, an adjustable cavity length device, a temperature control device, a nonlinear crystal 4 , a laser 5 , a dichromatic plane mirror 6 , a temperature controller 7 , and a cavity length locked feedback loop system 8 . Among them, the laser 5 of this embodiment adopts a single-frequency continuous wave fiber laser as the laser light source, the output wavelength is 1560nm, and the output power is 5W. The overall optical resonant cavity is composed of a first plano-concave mirror 204 and a second plano-concave mirror 206, the first plano-concave mirror 204 is used as the output mirror of the resonant frequency doubling cavity, and the second plano-concave mirror 206 is used as the input mirror of the resonant frequency doubling cavity...

Embodiment 2

[0058] like Figure 14 As shown, a device for frequency conversion of an integral optical resonant cavity in this embodiment is used in the process of optical parameter down-conversion to generate a compressed light field. The experimental device includes a shell, an adjustable cavity length device, a temperature control device, a nonlinear crystal 4 , a two-color plane mirror 6 , a temperature controller 7 , a cavity length locked feedback loop system 8 , and a laser 9 . Wherein, the laser 9 of this embodiment adopts a single-frequency continuous wave semiconductor laser as a laser light source, and outputs laser light with a wavelength of 780nm and an output power of 1W. The overall optical resonant cavity is composed of a first plano-concave mirror 204 and a second plano-concave mirror 206, and the first plano-concave mirror 204 serves as an input mirror and an output mirror of the resonant frequency doubling cavity. According to the coating design, a device for frequency ...

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Abstract

The invention discloses an integral optical resonant cavity for frequency conversion. The integral optical resonant cavity comprises a shell, a cavity length adjustable device, a temperature control device and a nonlinear crystal arranged in the temperature control device. The cavity length adjustable device comprises a first plano-concave mirror and a second plano-concave mirror, and the first plano-concave mirror, the second plano-concave mirror and the nonlinear crystal form an optical resonant cavity. Light sequentially passes through the first plano-concave mirror, the nonlinear crystal and the second plano-concave mirror. According to the integral optical resonant cavity for the frequency conversion, the cavity length stability of the optical resonant cavity is improved through integrated design, the temperature stability of the nonlinear crystal in the whole optical resonant cavity is improved through the temperature control device, and stable relative phase control between light fields participating in the frequency conversion process in the cavity is achieved. Meanwhile, the accurate control of the cavity length of the whole optical resonant cavity is realized through thecavity length adjustable device. In the optical frequency conversion process, the optimal conditions of phase matching conditions, impedance matching and mode matching are realized, and high nonlinearconversion efficiency is obtained.

Description

technical field [0001] The invention relates to the field of optical resonant cavities, in particular to an integral optical resonant cavity used for frequency conversion. Background technique [0002] The optical frequency conversion process is very important and indispensable in the fields of classical optics and quantum optics. In the process of optical frequency conversion, high nonlinear efficiency is one of the important indicators that everyone pursues. High-efficiency optical frequency conversion process can be used to obtain high-power output short-wave, mid-infrared and far-infrared lasers, which can provide necessary and high-quality laser light sources for breakthroughs in key technologies such as lithography technology and lidar. The high-efficiency optical frequency conversion process can also obtain stable output of high-quality quantum entangled light fields and squeezed light fields, which can provide necessary high-quality quantum light sources for scienti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35
CPCG02F1/353G02F1/3501H01S3/1028H01S3/0092H01S3/1317H01S3/139H01S3/109H01S3/105
Inventor 张宽收姜振宇冯晋霞李渊骥
Owner SHANXI UNIV