Norman Lippok,1 Jeffrey Holzgrafe,2 Georgios Kyriazidis,3 Yongjoo Kim,1 Xinrui Zhu,3 Yaowen Hu,3 Gage Hills,3 Marko Loncar,3 Benjamin J. Vakochttps://orcid.org/0000-0002-6623-3515,1 Hana Warner3
1Wellman Ctr. for Photomedicine, Harvard Medical School (United States) 2Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard Univ. (United States) 3Harvard John A. Paulson School of Engineering and Applied Sciences (United States)
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Time-stepped optical frequency comb (TSOFC) sources have extended the imaging capabilities of optical coherence tomography (OCT). However, existing TSOFC laser architectures have significant limitations in cost, complexity, and performance. A recently developed active integrated photonic circuit platform – lithium niobate-on-insulator (LNOI) – has the potential to address these limitations. We designed and fabricated custom LNOI integrated photonic circuits and demonstrated LNOI-based TSOFC sources for OCT. The fabricated LNOI photonic chips support optical frequency switching at the 1 ns time-scale, although the current laser prototypes are limited by the driving electronics to switching times of several hundred nanoseconds.
Norman Lippok,Jeffrey Holzgrafe,Georgios Kyriazidis,Yongjoo Kim,Xinrui Zhu,Yaowen Hu,Gage Hills,Marko Loncar,Benjamin J. Vakoc, andHana Warner
"Integrated time-stepped optical frequency comb laser sources for time-discrete OCT", Proc. SPIE PC12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII, PC123670R (9 March 2023); https://doi.org/10.1117/12.2652906
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Norman Lippok, Jeffrey Holzgrafe, Georgios Kyriazidis, Yongjoo Kim, Xinrui Zhu, Yaowen Hu, Gage Hills, Marko Loncar, Benjamin J. Vakoc, Hana Warner, "Integrated time-stepped optical frequency comb laser sources for time-discrete OCT," Proc. SPIE PC12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII, PC123670R (9 March 2023); https://doi.org/10.1117/12.2652906