Optical frequency domain angle measurement in a femtosecond laser autocollimator

Yuan Liu Chen, Yuki Shimizu, Jun Tamada, Yukitoshi Kudo, Shuhei Madokoro, Kazuki Nakamura, Wei Gao

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


A mode-locked laser autocollimator, in which a group of first-order diffracted beams from a grating reflector are detected by an autocollimation unit, has an expanded angle measurement range compared with a conventional autocollimator using a single-wavelength laser source. In this paper, a new optical frequency domain angle measurement method is proposed to increase the visibility of output signal of the mode-locked femtosecond laser autocollimator, which is limited by the overlap of the focused diffracted light spots. The output visibility of a prototype femtosecond laser autocollimator has been increased by the proposed method to approximately 100% over a large range of 21600 arc-seconds.

Original languageEnglish
Pages (from-to)16725-16738
Number of pages14
JournalOptics Express
Issue number14
Publication statusPublished - 2017 Jul 10

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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