400 MHz ultrafast optical coherence tomography

Dongmei Huang, Feng Li, Zijian He, Zihao Cheng, Chao Shang, P. K.A. Wai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)


An ultrafast time-stretched swept source with a sweep rate of 400 MHz is demonstrated based on the buffering of a 100 MHz femtosecond laser pulse train. To the best of our knowledge, this is the highest sweep rate of swept sources for optical coherence tomography (OCT) that has been reported. With a 10 dB sweep range of ∼100 nm, an axial resolution of 19 µm is obtained in the OCT. OCT imaging of high-speed rotating disks is demonstrated. A composite complex apodization method is proposed and demonstrated to enhance the signal to noise ratio in the OCT imaging.

Original languageEnglish
Pages (from-to)6675-6678
Number of pages4
JournalOptics Letters
Issue number24
Publication statusPublished - 15 Dec 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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