Phys. Rev. Lett. 98, 213902 (2007) [4 pages]Saturated Optical Absorption by Slow Molecules in Hollow-Core Photonic Band-Gap FibersReceived 12 January 2007; published 25 May 2007 We report on saturated absorption in a hollow-core photonic band-gap fiber filled with 12C2H2 molecules. We find that slow molecules provide a major contribution to the signal in the limit of low optical power and low pressure where the signal deviates significantly from the usual Lorentzian line shape. In particular, we observe a linewidth reduction of about 3 times as compared to the transit-time limited linewidth. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.213902
DOI:
10.1103/PhysRevLett.98.213902
PACS:
42.70.Qs, 33.70.Jg, 39.30.+w, 42.62.Fi
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