20 March 2013 High-speed miniaturized swept sources based on resonant MEMS mirrors and diffraction gratings
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Abstract
We show a broad range of swept source performances based on a highly-flexible external cavity laser architecture. Specifically, we demonstrate a 40-kHz 1300-nm swept source with 10 mm coherence length realized in a compact butterfly package. Fast wavelength sweeping is achieved through a 1D 20-kHz MEMS mirror in combination with an advanced diffraction grating. The MEMS mirror is a resonant electrostatic mirror that performs harmonic oscillation only within a narrow frequency range, resulting in low-jitter and long-term phase-stable sinusoidal bidirectional sweep operation with an A-scan rate of 40 kHz. The source achieves a coherence length of 10 mm for both the up- and downsweep and an OCT sensitivity of 105 dB.
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S. Gloor, S. Gloor, A. H. Bachmann, A. H. Bachmann, M. Epitaux, M. Epitaux, T. von Niederhäusern, T. von Niederhäusern, P. Vorreau, P. Vorreau, N. Matuschek, N. Matuschek, K. Hsu, K. Hsu, M. Duelk, M. Duelk, C. Vélez, C. Vélez, } "High-speed miniaturized swept sources based on resonant MEMS mirrors and diffraction gratings ", Proc. SPIE 8571, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII, 85712X (20 March 2013); doi: 10.1117/12.2007106; https://doi.org/10.1117/12.2007106
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