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A wide-band fiber optic frequency distribution system employing thermally controlled phase compensationAn active wide-band fiber optic frequency distribution system employing a thermally controlled phase compensator to stabilize phase variations induced by environmental temperature changes is described. The distribution system utilizes bidirectional dual wavelength transmission to provide optical feedback of induced phase variations of 100 MHz signals propagating along the distribution cable. The phase compensation considered differs from earlier narrow-band phase compensation designs in that it uses a thermally controlled fiber delay coil rather than a VCO or phase modulation to compensate for induced phase variations. Two advantages of the wide-band system over earlier designs are (1) that it provides phase compensation for all transmitted frequencies, and (2) the compensation is applied after the optical interface rather than electronically ahead of it as in earlier schemes. Experimental results on the first prototype shows that the thermal stabilizer reduces phase variations and Allan deviation by a factor of forty over an equivalent uncompensated fiber optic distribution system.
Document ID
19940006523
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Johnson, Dean
(University of Western Michigan Kalamazoo., United States)
Calhoun, Malcolm
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sydnor, Richard
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lutes, George
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Publication Information
Publication: NASA. Goddard Space Flight Center, The 24th Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting
Subject Category
Physics (General)
Accession Number
94N10995
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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