Integrated high-Q cascaded Fabry–Perot resonators based on lithium niobate Sagnac loop reflectors

  • Qian Qiao
  • , Jintian Lin
  • , Renhong Gao
  • , Jianglin Guan
  • , Chuntao Li
  • , Guanghui Zhao
  • , Xinzhi Zheng
  • , Minghui Li
  • , Qifeng Hou
  • , Xiaochao Luo
  • , Yingnuo Qiu
  • , Lingling Qiao
  • , Min Wang
  • , Ya Cheng

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We demonstrated an integrated high-Q cascaded Fabry–Perot (FP) resonator on lithium niobate on insulator (LNOI) implemented by multi-Sagnac loop reflectors, which was fabricated by femtosecond laser photolithography-assisted chemo-mechanical polishing (CMP). Compared with the resonator that comprised only two Sagnac loop reflectors (SLRs), there is a significant Q factor enhancement in the cascaded resonator formed by multi-SLRs. The loaded Q factor of the cascaded resonator was measured to be 1.16 × 106, a five-fold improvement compared to the state of the art on the same material platform.

Original languageEnglish
Pages (from-to)2370-2373
Number of pages4
JournalOptics Letters
Volume50
Issue number7
DOIs
StatePublished - 1 Apr 2025

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