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Bandwidth scaling and spectral flatness enhancement of optical frequency combs from phase-modulated continuous-wave lasers using cascaded four-wave mixing |
Optics Letters, Vol. 37, Issue 15, pp. 3066-3068 (2012)
http://dx.doi.org/10.1364/OL.37.003066
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Abstract
We introduce a new cascaded four-wave mixing technique that scales up the bandwidth of frequency combs generated by phase modulation of a continuous-wave (CW) laser while simultaneously enhancing the spectral flatness. As a result, we demonstrate a 10 GHz frequency comb with over 100 lines in a 10 dB bandwidth in which a record 75 lines are within a flatness of 1 dB. The cascaded four-wave mixing process increases the bandwidth of the initial comb generated by the modulation of a CW laser by a factor of five. The broadband comb has approximately quadratic spectral phase, which is compensated upon propagation in single-mode fiber, resulting in a 10 GHz train of 940 fs pulses.
© 2012 Optical Society of America
OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.5060) Fiber optics and optical communications : Phase modulation
(120.3940) Instrumentation, measurement, and metrology : Metrology
(320.5520) Ultrafast optics : Pulse compression
(060.5625) Fiber optics and optical communications : Radio frequency photonics
ToC Category:
Ultrafast Optics
History
Original Manuscript: April 25, 2012
Manuscript Accepted: May 27, 2012
Published: July 16, 2012
Citation
V. R. Supradeepa and Andrew M. Weiner, "Bandwidth scaling and spectral flatness enhancement of optical frequency combs from phase-modulated continuous-wave lasers using cascaded four-wave mixing," Opt. Lett. 37, 3066-3068 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-15-3066
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