Open AccessSpectrally resolved laser ranging with frequency combs
Author(s) -
M. Godbout,
Jean-Daniel Deschênes,
Jérôme Genest
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.015981
Subject(s) - optics , ranging , laser , interferometry , mode locking , resolution (logic) , frequency modulation , modulation (music) , physics , range (aeronautics) , materials science , image resolution , bandwidth (computing) , telecommunications , artificial intelligence , computer science , acoustics , composite material
The multiheterodyne beatnote between two frequency combs having pulses sliding one with respect to another is used to perform spectrally resolved ranging of diffuse reflectors at short distances. The sliding comb sources are generated using one mode-locked laser and a two-beam interferometer, but two properly controlled lasers could be used as well. A pseudo-random binary modulation of the pulses is used to increase the non-ambiguous range. Ranging with a spatial resolution of 21 cm and a spectral resolution of 10 cm(-1) over a 200 cm(-1) spectral range is demonstrated.