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Optically mutual-injected terahertz quantum cascade lasers for self-mixing velocity measurements.

Self-mixing velocity sensor based on a mutual-injected two-element terahertz quantum cascade laser (THz QCL) array is studied theoretically. The working characteristics of mutual-injected THz QCL array with different frequency detunings and self-mixing feedback strengths, as well as their influences... Full description

Journal Title: Optics express September 16, 2019, Vol.27(19), pp.27076-27087
Main Author: Li, Yuanyuan
Other Authors: Chu, Weidong , Yang, Ning , Ge, Lei , Xie, Yan , Zhang, Wei , Duan, Suqing , Wang, Yingxin , Sun, Jialin
Format: Electronic Article Electronic Article
Language: English
ID: E-ISSN: 1094-4087 ; DOI: 10.1364/OE.27.027076
Link: http://search.proquest.com/docview/2311658261/?pq-origsite=primo
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title: Optically mutual-injected terahertz quantum cascade lasers for self-mixing velocity measurements.
format: Article
creator:
  • Li, Yuanyuan
  • Chu, Weidong
  • Yang, Ning
  • Ge, Lei
  • Xie, Yan
  • Zhang, Wei
  • Duan, Suqing
  • Wang, Yingxin
  • Sun, Jialin
ispartof: Optics express, September 16, 2019, Vol.27(19), pp.27076-27087
description: Self-mixing velocity sensor based on a mutual-injected two-element terahertz quantum cascade laser (THz QCL) array is studied theoretically. The working characteristics of mutual-injected THz QCL array with different frequency detunings and self-mixing feedback strengths, as well as their influences on the self-mixing measurements are discussed in detail. Within the phase-locked range, each laser in the array reaches a stable state rapidly and can be used as a self-mixing detector due to the mutual injection coupling. The array will no longer be phase-locked when the frequency detuning of the lasers is too large, and only the laser that receives the feedback light can still be used for self-mixing velocity measurements. It is also found that even for the case of strong feedback, the THz QCLs will not be completely unstable and the self-mixing velocity measurements could also be possible. In addition, the simulation also shows that the array could measure two independent moving targets simultaneously....
language: eng
source:
identifier: E-ISSN: 1094-4087 ; DOI: 10.1364/OE.27.027076
fulltext: fulltext
issn:
  • 10944087
  • 1094-4087
url: Link


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titleOptically mutual-injected terahertz quantum cascade lasers for self-mixing velocity measurements.
creatorLi, Yuanyuan ; Chu, Weidong ; Yang, Ning ; Ge, Lei ; Xie, Yan ; Zhang, Wei ; Duan, Suqing ; Wang, Yingxin ; Sun, Jialin
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ispartofOptics express, September 16, 2019, Vol.27(19), pp.27076-27087
identifierE-ISSN: 1094-4087 ; DOI: 10.1364/OE.27.027076
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descriptionSelf-mixing velocity sensor based on a mutual-injected two-element terahertz quantum cascade laser (THz QCL) array is studied theoretically. The working characteristics of mutual-injected THz QCL array with different frequency detunings and self-mixing feedback strengths, as well as their influences on the self-mixing measurements are discussed in detail. Within the phase-locked range, each laser in the array reaches a stable state rapidly and can be used as a self-mixing detector due to the mutual injection coupling. The array will no longer be phase-locked when the frequency detuning of the lasers is too large, and only the laser that receives the feedback light can still be used for self-mixing velocity measurements. It is also found that even for the case of strong feedback, the THz QCLs will not be completely unstable and the self-mixing velocity measurements could also be possible. In addition, the simulation also shows that the array could measure two independent moving targets simultaneously....
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