Abstract

Chirping is the deliberate dispersion of the frequencies in a signal to remove a strong central peak. In a Fourier spectrometer, chirping improves dynamic range. For typical applications, the improvement is equivalent to about 16 dB in SNR. A very large nonlinear phase correction is required, but this is shown to be surprisingly simple to achieve in practice.

© 1974 Optical Society of America

Use of chirping to compensate for nonlinearities in Fourier spectroscopy

Thomas P. Sheahen
J. Opt. Soc. Am. 64(4) 485-494 (1974)

Chirped Fourier Spectroscopy. 2: Theory of Resolution and Contrast

Thomas P. Sheahen
Appl. Opt. 14(4) 1004-1012 (1975)

Polarization Fourier Spectrometer for Astronomy

Michael F. A’Hearn, Francis J. Ahern, and David M. Zipoy
Appl. Opt. 13(5) 1147-1157 (1974)

Instrumentation Optimization in Fourier Spectroscopy. 1: Far Infrared Beam Splitters

J. L. Deuzé and A. L. Fymat
Appl. Opt. 13(8) 1807-1813 (1974)

Photodiode array Fourier transform spectrometer with improved dynamic range

T. H. Barnes
Appl. Opt. 24(22) 3702-3706 (1985)