114 nm broadband all-fiber nonlinear polarization rotation mode locked-laser and time-stretch optical coherence tomography

Hongjie Chen, Yujia Li, Dongmei Huang, Feng Li, Chao Lu, P. K.A. Wai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


We propose and demonstrate an all-fiber Er-doped mode-locked laser with a 3-dB spectrum of 114 nm by using nonlinear polarization rotation (NPR), which to the best of our knowledge is the first realization to date of such a broad spectrum without any spatial optical devices. The repetition rate and pulse width of the laser are 183.6 MHz and 3.7 ps, respectively. Such an all-fiber NPR mode-locked laser is then applied in time-stretch optical coherence tomography. The axial resolution is 12.1 µm. The all-fiber high speed broadband swept laser based on the time stretching technique has compact structure and high stability, which is a promising source for frequency metrology and high resolution optical coherence tomography.

Original languageEnglish
Pages (from-to)33322-33330
Number of pages9
JournalOptics Express
Issue number21
Publication statusPublished - 11 Oct 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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