Coherent optical modulation for antenna remotingA coherent fiber optic link employing wideband frequency modulation (FM) of the optical carrier is used to transfer radio frequency (RF) or microwave signals. This system is used to link a remotely located antenna to a conveniently located electronics processing site. The advantages of coherent analog fiber optic systems over non-coherent intensity modulated fiber optic analog transmission systems are described. An optical FM link employing an indirect transmitter to frequency modulate the optical carrier and a microwave delay line discriminator receiver is described. Measured performance data for a video signal centered at 60 MHz is presented showing the use of wideband FM in the link.
Fitzmartin, D. J. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Gels, R. G. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Balboni, E. J. (Charles Stark Draper Lab., Inc. Cambridge, MA, United States)
August 16, 2013
January 1, 1991
Publication: In: Optical technology for microwave applications V; Proceedings of the Meeting, Orlando, FL, Apr. 3-5, 1991 (A93-25726 09-74)