title: Time-domain near-infrared spectroscopy using a wavelength-tunable narrow-linewidth source by spectral compression of ultrashort soliton pulses.
abstract: Time-domain absorption spectroscopy was demonstrated using a wideband, rapid wavelength-tunable, narrow-linewidth source based on an Er-doped ultrashort pulse fiber laser system. The spectrum of the Raman-shifted ultrashort soliton pulse was compressed using a comb-profile dispersion increasing fiber. Rapid wavelength sweeping was demonstrated using an electro-optical intensity modulator. The absorption spectrum of CH(2)Cl(2) liquid at 1625-1780 nm was observed in a 10 μs time-domain measurement.
authors.affiliation: Department of Electrical Engineering and Computer Science, Nagoya University, Nagoya 464-8603, Japan. nishizawa@nuee.nagoya‑u.ac.jp
authors.forename: Norihiko
authors.initials: N
authors.lastname: Nishizawa
authors.forename: Koji
authors.initials: K
authors.lastname: Takahashi
mesh_terms: D004867:Equipment Design; D005336:Fiber Optic Technology; D007259:Infrared Rays; D007834:Lasers; D008752:Methylene Chloride / Q000737:chemistry; D055620:Optical Phenomena; D019265:Spectroscopy, Near-Infrared; D013059:Spectrum Analysis, Raman; D013997:Time Factors
chemical_list: D008752:Methylene Chloride