DocumentCode
1462860
Title
Detection of Low-Power RF Signals Using a Two Laser Multimode Optoelectronic Oscillator
Author
Devgan, Preetpaul S. ; Urick, Vincent J. ; Williams, Keith J.
Author_Institution
U.S. Naval Res. Lab., Washington, DC, USA
Volume
24
Issue
10
fYear
2012
fDate
5/15/2012 12:00:00 AM
Firstpage
857
Lastpage
859
Abstract
We present a two laser, multimode optoelectronic oscillator (OEO) for detecting unknown low-power RF signals. By switching between one or two lasers, the OEO cavity will become sensitive to an interleaved set of frequencies. The system has an input sensitivity of -78.4 dBm, which is only 14.2 dB higher than the thermal limit for a 140-MHz bandwidth. In addition, mode spacing has been increased to 100 MHz, a 20 times increase from previous demonstrations.
Keywords
Mach-Zehnder interferometers; frequency measurement; light interferometry; measurement by laser beam; microwave measurement; optoelectronic devices; oscillators; signal detection; laser multimode optoelectronic oscillator; low power RF signal detection; radio frequency signal detection; Cavity resonators; Gain; Laser modes; Measurement by laser beam; Noise; Power lasers; RF signals; Dual wavelength; optoelectronic oscillator; radio frequency signal detection;
fLanguage
English
Journal_Title
Photonics Technology Letters, IEEE
Publisher
ieee
ISSN
1041-1135
Type
jour
DOI
10.1109/LPT.2012.2189203
Filename
6164217
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