Reference-free, high-resolution measurement method of timing jitter spectra of optical frequency combs

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Timing jitter is one of the most important properties of femtosecond mode-locked lasers and optical frequency combs. Accurate measurement of timing jitter power spectral density (PSD) is a critical prerequisite for optimizing overall noise performance and further advancing comb applications both in the time and frequency domains. Commonly used jitter measurement methods require a reference mode-locked laser with timing jitter similar to or lower than that of the laser-under-test, which is a demanding requirement for many laser laboratories, and/or have limited measurement resolution. Here we show a high-resolution and reference-source-free measurement method of timing jitter spectra of optical frequency combs using an optical fibre delay line and optical carrier interference. The demonstrated method works well for both mode-locked oscillators and supercontinua, with 2 x 10(-9) fs(2)/Hz (equivalent to -174 dBc/Hz at 10-GHz carrier frequency) measurement noise floor. The demonstrated method can serve as a simple and powerful characterization tool for timing jitter PSDs of various comb sources including mode-locked oscillators, supercontinua and recently emerging Kerr-frequency combs; the jitter measurement results enabled by our method will provide new insights for understanding and optimizing timing noise in such comb sources.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2017-01
Language
English
Article Type
Article
Keywords

MODE-LOCKED LASERS; PHASE-NOISE MEASUREMENT; FEMTOSECOND FIBER LASER; HIGH-REPETITION-RATE; SUPERCONTINUUM GENERATION; MICROSTRUCTURE FIBER; DYNAMIC-RANGE; DELAY-LINE; MICROWAVE; STABILIZATION

Citation

SCIENTIFIC REPORTS, v.7

ISSN
2045-2322
DOI
10.1038/srep40917
URI
http://hdl.handle.net/10203/220910
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
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