Journal
OPTICS EXPRESS
Volume 18, Issue 17, Pages 18171-18179Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.018171
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- National Science Foundation (NSF) [ECCS-0601692]
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We discuss a simple, linear, zero-delay implementation of spectral shearing interferometry for amplitude and phase characterization of optical frequency comb sources and arbitrary waveforms. We demonstrate this technique by characterizing two different high repetition rate (similar to 10 GHz) frequency comb sources, generated respectively by strong external and intracavity phase modulation of a continuous-wave laser. This technique is easy to implement, requiring only an intensity modulator and an optical spectrum analyzer (OSA), and is demonstrated to work at average power levels down to 100nW (10aJ/pulse at 10 GHz). By exploiting the long coherence lengths of these frequency combs and the self-referenced nature of the measurement, we also demonstrate a simple single-ended measurement of dispersion and dispersion slope in long lengths of fiber (>25km). (C) 2010 Optical Society of America
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