A dispersive grating compressor was included in a fiber ring laser to generate an unequally spaced frequency comb spanning . Beating of nearby modes in the comb naturally assigns unique amplitude modulation frequencies to each spectral component emitted. The source contains no moving parts. The single-mode fiber-coupled output is directed through hydrogen cyanide gas and detected by a photodiode. A Fourier transform of a record yields a spectrum that agrees with results from a grating spectrometer at resolution. By engineering stable, broadband combs, the technique could result in a universal and simple approach for spectroscopy at almost arbitrary measurement speeds and spectral resolutions limited only by Fourier principles.
© 2006 Optical Society of AmericaFull Article | PDF Article
Donald E. Jennings, A. Weber, and J. W. Brault
Appl. Opt. 25(2) 284-290 (1986)
Kotaro Suzumura, Chikako Ishibashi, and Hiroyuki Sasada
Opt. Lett. 22(17) 1356-1358 (1997)
Philippe Giaccari, Jean-Daniel Deschênes, Philippe Saucier, Jérôme Genest, and Pierre Tremblay
Opt. Express 16(6) 4347-4365 (2008)