Title :
A high dynamic range wideband heterodyne acousto-optical channelizer
Author :
Yee, T.K. ; Chalfant, C.H. ; Coward, J.F. ; Titus, J.R. ; Morrow, H.E. ; Henderson, D. ; Salsman, J.T. ; Pechner, D. ; Newell, J.L. ; Strunk, S. ; Morrisroe, K.M.
Author_Institution :
Lockheed Missiles & Space Co., Sunnyvale, CA, USA
Abstract :
The performance of a heterodyne acoustooptical channelizer in a Mach-Zehnder configuration with an average single-channel signal-to-noise ratio (per megahertz) of 76 dB is described. The spurious signals generated by overlapping reference tones were negligible over 76 dB by virtue of the optical system design and a dual-detector cancellation scheme using an intermediate frequency of 70 MHz. Performance is described in terms of signal to noise, wideband signal uniformity, channel profile, channel isolation, and phase stability. It is concluded that heterodyne acoustooptical technologies have potential for high-performance channelizers
Keywords :
acousto-optical devices; spectral analysers; 70 MHz; Mach-Zehnder configuration; dual-detector cancellation scheme; heterodyne acoustooptical channelizer; optical system design; overlapping reference tones; single-channel signal-to-noise ratio; spurious signals; Dynamic range; Frequency; Noise cancellation; Optical mixing; Optical noise; Phase noise; Signal generators; Signal to noise ratio; Stability; Wideband;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.67033
