Title :
A spatial-spectral holographic correlator at 1536 nm using 30-symbol BPSK and QPSK codes optimized for secure communications
Author :
Harris, T.L. ; Sun, Y. ; Cone, R.L. ; Babbitt, W.R. ; Ritcey, J.A. ; Equall, R.W.
Author_Institution :
Dept. of Phys., Montana State Univ., Bozeman, MT, USA
Abstract :
Summary form only given. Spatial-spectral holographic devices combine spectral hole burning with conventional holography to perform correlations and other signal processing and memory functions in real time and are ideally suited to process multi-phase encoded information. Such devices can operate at bandwidths greater than 10 GHz, have time-bandwidth products of 10/sup 3/ to 10/sup 5/ and can potentially enhance optical telecommunications capabilities. Employing Er/sup 3+/:Y/sub 2/SiO/sub 5/, we demonstrate excellent signal fidelity in the important telecommunications band around 1550 nm. We further believe this to be the maximum number of symbols yet achieved for correlations with optimized codes.
Keywords :
erbium; holography; optical communication equipment; optical correlation; optical hole burning; optical materials; optical modulation; quadrature phase shift keying; security of data; ytterbium compounds; 1550 nm; 1550 nm telecommunications band; 30-symbol BPSK codes; Er/sup 3+/:Y/sub 2/SiO/sub 5/; QPSK codes; Y/sub 2/SiO/sub 5/:Er; conventional holography; correlations; memory functions; multi-phase encoded information processing; optical telecommunications capabilities; optimized codes; real time; secure communications optimisation; signal fidelity; signal processing; spatial-spectral holographic correlator; spatial-spectral holographic devices; spectral hole burning; time-bandwidth products; Autocorrelation; Binary phase shift keying; Correlators; Diode lasers; Frequency modulation; Holographic optical components; Holography; Laser stability; Optical signal processing; Quadrature phase shift keying;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.834193
