Open AccessTime domain measurement of the THz refractivity of water vapor
Author(s) -
Yihong Yang,
Mahboubeh Mandehgar,
D. Grischkowsky
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.026208
Subject(s) - optics , terahertz radiation , water vapor , materials science , refractive index , absorption (acoustics) , attenuation coefficient , laser , optical path , humidity , optoelectronics , physics , meteorology
We report the measurement of the essentially frequency independent refractivity of water vapor from 0.1 to 1 THz, independent of the simultaneous strong THz pulse broadening and absorption. The humidity dependent transit time of THz pulses through a 170 m long round trip path was measured to a precision of 0.1 ps, using a mode-locked laser as an optical clock.
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