Title :
High stability microwave fiber optic systems: demonstrations and applications
Author :
Logan, Ronald T., Jr. ; Lutes, George F.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
Measurements are presented for microwave fiber optic transmission systems that have much lower phase noise than high quality oscillator signals which have been multiplied to microwave frequencies. Progress in the development of wideband microwave fiber optic links for direct transmissions of the S- and X-band low-noise amplifier outputs in JPL/NASA deep space station antennas is discussed. A testbed microwave fiber optic system using a semiconductor-diode-laser pumped neodymium-yttrium-aluminum-garnet (Nd:YAG) laser and a lithium niobate electrooptic modulator is described. This system is used to demonstrate transmission of signals from 2.5 GHz to 12 GHz over 29 km between two deep space stations. Phase noise performance measured at X-band on this system is presented, and factors affecting phase noise performance are discussed
Keywords :
frequency stability; interference (signal); microwave links; optical links; optical modulation; random noise; space communication links; transmitters; 2.5 to 12 GHz; 29 km; Allan deviation; LD pumped Nd:YAG laser; LiNbO3; S-band; X-band; YAG:Nd; YAl5O12:Nd; deep space station antennas; direct transmissions; electrooptic modulator; high stability; low-noise amplifier outputs; lower phase noise; microwave fiber optic systems; optical transmitter design; testbed system; wideband microwave fiber optic links; Broadband antennas; Frequency measurement; Microwave measurements; Microwave oscillators; Noise measurement; Optical fibers; Phase measurement; Phase noise; Space stations; Stability;
Conference_Titel :
Frequency Control Symposium, 1992. 46th., Proceedings of the 1992 IEEE
Conference_Location :
Hershey, PA
Print_ISBN :
0-7803-0476-4
DOI :
10.1109/FREQ.1992.269998
