Share Email Print
cover

Proceedings Paper

Demonstration of minute continuous-wave triggered supercontinuum generation at 1 µm for high-speed biophotonic applications
Author(s): Yi Qiu; Chi Zhang; Kenneth K. Y. Wong; Kevin K. Tsia
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Ultra-broadband supercontinuum (SC) at 1-μm wavelength is regarded as diagnostics window in bio-photonics due to its large penetration depth in tissues and less Rayleigh scattering. Dispersive Fourier transform (DFT) is an important technique to realize the high-speed, ultra-fast and high-throughput spectroscopy. Thus, a stable light source with good temporal stability plays an important role in the bio-imaging and spectroscopy applications. We here demonstrate stabilized and enhanced SC generation at 1 μm by a minute continuous-wave (CW) triggering scheme. By introducing a weak CW (~200,000 times weaker than the pump), a significant broadening in the SC bandwidth and an improvement in the temporal stability can be obtained. Over 8 dB gain is achieved in both blue and red edges and the SC spectrum can span from 900 nm to over 1300 nm with the CW trigger. We present the CW-triggered SC capability of enabling highspeed spectroscopy based on DFT at 1 μm. In regards to the performance of DFT, the wavelength-time mapping fluctuation reduced by 50% which is an indication of the improvement of the temporal stability. This triggering scheme allows, for the first time, 1-μm DFT at a spectral acquisition rate of 20 MHz with good temporal stability - paving the way toward realizing practical real-time, ultrafast biomedical spectroscopy and imaging.

Paper Details

Date Published: 15 February 2012
PDF: 7 pages
Proc. SPIE 8240, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI, 82400O (15 February 2012); doi: 10.1117/12.907743
Show Author Affiliations
Yi Qiu, The Univ. of Hong Kong (Hong Kong, China)
Chi Zhang, The Univ. of Hong Kong (Hong Kong, China)
Kenneth K. Y. Wong, The Univ. of Hong Kong (Hong Kong, China)
Kevin K. Tsia, The Univ. of Hong Kong (Hong Kong, China)


Published in SPIE Proceedings Vol. 8240:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI
Konstantin L. Vodopyanov, Editor(s)

© SPIE. Terms of Use
Back to Top