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Optics Express

Optics Express

  • Editor: C. Martijin de Sterke
  • Vol. 19, Iss. 7 — Mar. 28, 2011
  • pp: 6635–6647

Fiber-optic Cherenkov radiation in the few-cycle regime

Guoqing Chang, Li-Jin Chen, and Franz X. Kärtner  »View Author Affiliations


Optics Express, Vol. 19, Issue 7, pp. 6635-6647 (2011)
http://dx.doi.org/10.1364/OE.19.006635


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Abstract

Fiber-optic Cherenkov radiation has emerged as a wavelength conversion technique to achieve isolated spectrum in the visible wavelength range. Most published results have reinforced the impression that CR forms a narrowband spectrum with poor efficiency. We both theoretically and experimentally investigate fiber-optic Cherenkov radiation excited by few-cycle pulses. We introduce the coherence length to quantify the Cherenkov-radiation bandwidth and its dependence on propagation distance. Detailed numerical simulations verified by experimental results reveal three unique features that are absent when pumped with often-used, long pulses; that is, continuum generation (may span one octave in connection with the pump spectrum), high conversion efficiency (up to 40%), and broad bandwidth (70 nm experimentally obtained) for the isolated Cherenkov radiation spectrum. These merits allow achieving broadband visible-wavelength spectra from low-energy ultrafast sources which opens up new applications (e.g. precision calibration of astronomical spectrographs).

© 2011 OSA

OCIS Codes
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(140.3510) Lasers and laser optics : Lasers, fiber
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: January 4, 2011
Revised Manuscript: February 22, 2011
Manuscript Accepted: March 10, 2011
Published: March 23, 2011

Citation
Guoqing Chang, Li-Jin Chen, and Franz X. Kärtner, "Fiber-optic Cherenkov radiation in the few-cycle regime," Opt. Express 19, 6635-6647 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-7-6635


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