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Construction and Calibration of a Difference Frequency Laser Spectrometer and New THZ Frequency Measurements of water and AmmoniaA three laser system based on 852nm DBR lasers has been constructed and used to generate radiation in the 750 GHz to 1600 GHz frequency region. The system works by locking two of the three lasers to modes of an ultra low expansion Fabry-Perot cavity. The third laser is offset locked to one of the cavity locked lasers with conventional microwave techniques. The signal from the offset laser and the other cavity locked laser are injected into a Master Oscillator Power Amplifier (MOPA), amplified and focused on a low temperature grown GaAs photomixer, which radiates the difference frequency. The system has been calibrated with molecular lines to better than one part in 10(exp 7). In this paper we present the application of this system to the v(sub 2) in inversion band of Ammonia and the ground and v(sub 2) states of water. A discussion of the system design, the calibration and the new spectral measurements will be presented.
Document ID
20010000155
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other
Authors
Pearson, J. C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Pickett, Herbert M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Chen, Pin
(National Inst. of Standards and Technology Boulder, CO United States)
Matsuura, Shuji
(California Inst. of Tech. Pasadena, CA United States)
Blake, Geoffry A.
(California Inst. of Tech. Pasadena, CA United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 1999
Subject Category
Lasers And Masers
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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