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Updated: Jul 13, 2026

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Saturated optical absorption by slow molecules in hollow-core photonic band-gap fibers
Jan Hald1, Jan C Petersen, Jes Henningsen
1Danish Fundamental Metrology Ltd., Matematiktorvet 307, DK-2800 Kgs. Lyngby, Denmark. jha@dfm.dtu.dk
Physical Review Letters
|August 7, 2007
Abstract:
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.

