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Highly optical feedback-tolerant single-mode monolithic coupled-cavity laser with a high-Q deformed square microcavity.

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Title: Highly optical feedback-tolerant single-mode monolithic coupled-cavity laser with a high-Q deformed square microcavity.
Authors: Dong, Zhong1,2 (AUTHOR), Hu, Biwei1,2 (AUTHOR), Zhang, Zhenning1,2 (AUTHOR), Shi, Yang1,2 (AUTHOR), Hu, Zunhao1,2 (AUTHOR), Chen, Youling1,2 (AUTHOR), Xiao, Jinlong1,2 (AUTHOR), Yang, Yuede1,2 (AUTHOR) yyd@semi.ac.cn, Huang, Yongzhen1,2 (AUTHOR) yzhuang@semi.ac.cn
Source: Optics & Laser Technology. Dec2025:Part E, Vol. 192, pN.PAG-N.PAG. 1p.
Subjects: Optical feedback, Microcavity lasers, Cavity resonators, Photolithography, Lasers, Whispering gallery modes, Photon counting
Abstract: • Effectively suppresses the higher-order whispering-gallery modes and enables stable lasing a high- Q coupled mode. • The laser maintains excellent single-mode operation even at an optical feedback intensity ratio of -11 dB. • Significantly improves the single-mode performance and noise characteristics of traditional monolithic coupled-cavity lasers. • Fabricated using regrowth-free planar fabrication techniques via i-line photolithography, offering simplicity and low cost. We have proposed and experimentally demonstrated an external optical feedback insensitive coupled-cavity laser featuring a deformed square microcavity. By optimizing the microcavity structure, we effectively suppress higher-order whispering-gallery modes, enabling stable lasing in a high-quality (Q) coupled mode with excellent single-mode characteristics and low relative intensity noise. Through the synergistic effect of introducing high- Q lasing mode and increasing the photon number ratio within the microcavity, the deformed coupled-cavity laser achieves significantly enhanced feedback tolerance compared to the conventional design, maintaining stable single-mode operation even at a feedback intensity ratio of −11 dB. Furthermore, owing to the elimination of complex fabrication processes, this laser presents a promising solution for isolator-free light sources in future photonic integrated circuits. [ABSTRACT FROM AUTHOR]
Copyright of Optics & Laser Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 189499505
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Highly optical feedback-tolerant single-mode monolithic coupled-cavity laser with a high-Q deformed square microcavity.
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  Data: <searchLink fieldCode="AR" term="%22Dong%2C+Zhong%22">Dong, Zhong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hu%2C+Biwei%22">Hu, Biwei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Zhenning%22">Zhang, Zhenning</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shi%2C+Yang%22">Shi, Yang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hu%2C+Zunhao%22">Hu, Zunhao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Youling%22">Chen, Youling</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiao%2C+Jinlong%22">Xiao, Jinlong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Yuede%22">Yang, Yuede</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> yyd@semi.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Huang%2C+Yongzhen%22">Huang, Yongzhen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> yzhuang@semi.ac.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Optics+%26+Laser+Technology%22">Optics & Laser Technology</searchLink>. Dec2025:Part E, Vol. 192, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Optical+feedback%22">Optical feedback</searchLink><br /><searchLink fieldCode="DE" term="%22Microcavity+lasers%22">Microcavity lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Cavity+resonators%22">Cavity resonators</searchLink><br /><searchLink fieldCode="DE" term="%22Photolithography%22">Photolithography</searchLink><br /><searchLink fieldCode="DE" term="%22Lasers%22">Lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Whispering+gallery+modes%22">Whispering gallery modes</searchLink><br /><searchLink fieldCode="DE" term="%22Photon+counting%22">Photon counting</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Effectively suppresses the higher-order whispering-gallery modes and enables stable lasing a high- Q coupled mode. • The laser maintains excellent single-mode operation even at an optical feedback intensity ratio of -11 dB. • Significantly improves the single-mode performance and noise characteristics of traditional monolithic coupled-cavity lasers. • Fabricated using regrowth-free planar fabrication techniques via i-line photolithography, offering simplicity and low cost. We have proposed and experimentally demonstrated an external optical feedback insensitive coupled-cavity laser featuring a deformed square microcavity. By optimizing the microcavity structure, we effectively suppress higher-order whispering-gallery modes, enabling stable lasing in a high-quality (Q) coupled mode with excellent single-mode characteristics and low relative intensity noise. Through the synergistic effect of introducing high- Q lasing mode and increasing the photon number ratio within the microcavity, the deformed coupled-cavity laser achieves significantly enhanced feedback tolerance compared to the conventional design, maintaining stable single-mode operation even at a feedback intensity ratio of −11 dB. Furthermore, owing to the elimination of complex fabrication processes, this laser presents a promising solution for isolator-free light sources in future photonic integrated circuits. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Optics & Laser Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.optlastec.2025.113985
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Optical feedback
        Type: general
      – SubjectFull: Microcavity lasers
        Type: general
      – SubjectFull: Cavity resonators
        Type: general
      – SubjectFull: Photolithography
        Type: general
      – SubjectFull: Lasers
        Type: general
      – SubjectFull: Whispering gallery modes
        Type: general
      – SubjectFull: Photon counting
        Type: general
    Titles:
      – TitleFull: Highly optical feedback-tolerant single-mode monolithic coupled-cavity laser with a high-Q deformed square microcavity.
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            NameFull: Dong, Zhong
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            NameFull: Hu, Biwei
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              M: 12
              Text: Dec2025:Part E
              Type: published
              Y: 2025
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