Arbitrary amplitude femtosecond pulse shaping via a digital micromirror device
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AbstractAn ultrafast spectrum programmable femtosecond laser may enhance the performance of a wide variety of scientific applications, e.g., multi-photon imaging. In this paper, we report a digital micromirror device (DMD)-based ultrafast pulse shaper, i.e., DUPS, for femtosecond laser arbitrary amplitude shaping - the first time a programmable binary device reported to shape the amplitudes of ultrafast pulses spectrum at up to 32 kHz rate over a broad wavelength range. The DUPS is highly efficient, compact, and low cost based on the use of a DMD in combination with a transmission grating. Spatial and temporal dispersion introduced by the DUPS is compensated by a quasi-4-f setup and a grating pair, respectively. Femtosecond pulses with arbitrary spectrum shapes, including rectangular, sawtooth, triangular, double-pulse, and exponential profile, have been demonstrated in our experiments. A feedback operation process is implemented in the DUPS to ensure a robust and repeatable shaping process. The total efficiency of the DUPS for amplitude shaping is measured to be 27%.
Acceptance Date28/10/2018
All Author(s) ListChenglin Gu, Dapeng Zhang, Yina Chang, Shih-Chi Chen
Journal nameJournal of Innovative Optical Health Sciences
Volume Number12
Issue Number1
PublisherWorld Scientific Publishing
Place of PublicationSingapore
Article number1840002
LanguagesEnglish-United States
KeywordsPulse shaping, DMD

Last updated on 2020-21-10 at 02:32