Journal
OPTICS LETTERS
Volume 39, Issue 23, Pages 6593-6596Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.39.006593
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Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [HKU 7172/12E, HKU 717510E, HKU 717911E, HKU 720112E]
- University Development Fund of HKU
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We demonstrate an all-fiber breathing laser as inertia-free swept source (BLISS), with an ultra-compact design, for the emerging ultrafast bioimaging modalities. The unique feature of BLISS is its broadband wavelength-swept operation (similar to 60 nm) with superior temporal stability in terms of both long term (0.08 dB over 27 h) and shot-to-shot power variations (2.1%). More importantly, it enables a wavelength sweep rate of > 10 MHz (similar to 7 x 10(8) nm/s)-orders of- magnitude faster than the existing swept sources based on mechanical or electrical tuning techniques. BLISS thus represents a practical and new generation of swept source operating in the unmet megahertz swept-rate regime that aligns with the pressing need for scaling the optical bioimaging speed in ultrafast phenomena study or high-throughput screening applications. To showcase its utility in high-speed optical bioimaging, we here employ BLISS for ultrafast time-stretch microscopy and multi-MHz optical coherence tomography of the biological specimen at a single-shot line-scan rate or A-scan rate of 11.5 MHz. (C) 2014 Optical Society of America
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