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Proceedings Paper

Fiber-optic Cherenkov radiation excited by few-cycle pulses
Author(s): Guoqing Chang; Li-Jin Chen; Franz X. Kärtner
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Paper 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.

Paper Details

Date Published: 21 February 2011
PDF: 9 pages
Proc. SPIE 7937, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV, 79371M (21 February 2011); doi: 10.1117/12.877068
Show Author Affiliations
Guoqing Chang, Massachusetts Institute of Technology (United States)
Li-Jin Chen, Massachusetts Institute of Technology (United States)
Franz X. Kärtner, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 7937:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV
Kong-Thon Tsen; Jin-Joo Song; Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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