Measurements and Numerical Analysis for Femtosecond Pulse Deformations After Propagation of Hundreds of Meters in Air with Water-Vapor Absorption Lines
Applied Optics, Vol. 43, Issue 29, pp. 5523-5530 (2004)
http://dx.doi.org/10.1364/AO.43.005523
Acrobat PDF (399 KB)
Abstract
We have clarified the influences of water-vapor absorption lines in air on femtosecond pulse propagations from experimental and theoretical points of view. Precise measurements for the femtosecond pulse shapes after propagation of as much as 300 m through air have been made in a semiunderground optical testing tunnel. We observed the pulse splitting and the enhancement of the pulse broadening due to the 100-m propagation in air. The experimental results are in good agreement with the theoretical analysis by use of the HITRAN database at the edge and the center of the water-vapor absorption regions in air. Measured autocorrelation traces are mostly reproduced by those calculated with only the real part (dispersion) of the refractive index modulated by water-vapor absorption lines in air. This fact enables us to conclude that the pulse deformations due to water absorption lines in air are caused mainly by the real part (dispersion), not by the imaginary part (absorption), of the refractive index of air.
© 2004 Optical Society of America
OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(140.4050) Lasers and laser optics : Mode-locked lasers
(250.5530) Optoelectronics : Pulse propagation and temporal solitons
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7100) Ultrafast optics : Ultrafast measurements
Citation
Yoshihisa Yamaoka, Lijiang Zeng, Kaoru Minoshima, and Hirokazu Matsumoto, "Measurements and Numerical Analysis for Femtosecond Pulse Deformations After Propagation of Hundreds of Meters in Air with Water-Vapor Absorption Lines," Appl. Opt. 43, 5523-5530 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-29-5523
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