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Proceedings Paper

High-resolution spectra of cross-phase-modulation for an A/D converter
Author(s): Peng Pei Ho; Quan-Zhen Wang; Q. D. Liu; Daniel Liu; Robert R. Alfano
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Paper Abstract

The spectral sub-structures of XPM were measured using a high resolution optical spectral analysis system. The observation is in good agreement with the theoretical prediction. The oscillatory behavior of the XPM spectrum is suggested to be used for a high-bit all-optical XPM A/D converter. With the advent of ultrashort laser sources, it has been established that a light pulse can be used to control the properties of its own or another light pulse by using optical nonlinear processes in a material. This important property can be utilized for the future generation of high-speed optical computations and communications. Over the past several years, the operation of ultrafast optical logic gated using picosecond Sagnac Kerr Interferometer switch and phase conjugation gates have been successfully demonstrated. The third order nonlinear process cross-phase-modulation (XPM), in which the phase of a weak signal pulse is modulated by the index change induced by a strong pump pulse to produce the spectral broadening, provides a novel method to modulated the frequency of optical pulses at THz speed. We propose the ultrafast all optical A/D converter using XPM and report on measurements on the fine spectral structures of the XPM spectra of picosecond laser pulses using high resolution grating spectral analysis system. The observed substructure of the oscillatory XPM spectrum is suggested to be used for increasing the accuracy of all optical XPM A/D converters.

Paper Details

Date Published: 10 June 1994
PDF: 4 pages
Proc. SPIE 2155, Optoelectronic Signal Processing for Phased-Array Antennas IV, (10 June 1994); doi: 10.1117/12.177425
Show Author Affiliations
Peng Pei Ho, CUNY/City College (United States)
Quan-Zhen Wang, CUNY/City College (United States)
Q. D. Liu, CUNY/City College (United States)
Daniel Liu, CUNY/City College (United States)
Robert R. Alfano, CUNY/City College (United States)

Published in SPIE Proceedings Vol. 2155:
Optoelectronic Signal Processing for Phased-Array Antennas IV
Brian M. Hendrickson, Editor(s)

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