Title :
Fiberoptic based recirculating memory loop
Author :
Saedi, R. ; Daryoush, A. ; Herczfeld, P.
Author_Institution :
Drexel Univ., Philadelphia, PA, USA
Abstract :
The authors discuss the design of a low-loss, low-noise figure, fiber optic delay element at 1300 nm, capable of recirculating a short electrical pulse as long as a millisecond over the 2-4 GHz frequency band by using an adaptive gain equalizing technique. While the RF pulses are recirculating in the system the noise level starts to build up. By looking at the spectrum of the output signal the effect of the recirculation on the spectral purity of the microwave signals can be studied. The spectral purity characteristics of recirculated signals were quantified for various recirculation times.<>
Keywords :
analogue storage; delay lines; microwave devices; optical fibres; optoelectronic devices; pulse circuits; signal processing equipment; 1 ms; 1300 nm; 2 to 4 GHz; RF pulses; SHF; UHF; adaptive gain equalizing technique; design; fiber optic delay element; frequency band; low-loss; low-noise figure; microwave signals; noise level; recirculated signals; recirculating memory loop; recirculation times; short electrical pulse; spectral purity; spectral purity characteristics; Equalizers; Frequency response; Noise figure; Optical fiber couplers; Optical fibers; Optical pulses; Optical resonators; Optical switches; Pulse amplifiers; Radio frequency;
Conference_Titel :
Microwave Symposium Digest, 1992., IEEE MTT-S International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-0611-2
DOI :
10.1109/MWSYM.1992.188074
