Ultrafast optical pulse digitization with unary spectrally encoded cross-phase modulation
Ultrafast optical pulse digitization with unary spectrally encoded cross-phase modulation
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DOI：
10.1364/ao.36.003425
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发表时间：
1997-05-20
期刊：
影响因子：
1.9
通讯作者：
Alfano, RR
中科院分区：
文献类型：
--
作者：
Ho, PP;Wang, QZ;Alfano, RR
本文介绍了一种用于高速光信号处理的超短激光脉冲强度补偿方法。该数字化基于通过交叉相位调制（XPM）的非线性光学过程由更强的泵浦（信号）脉冲对弱探测（载波）脉冲的光谱展宽。改变信号脉冲强度以产生可以编码成数字形式的不同光谱宽度。使用一个50 ps的时分复用脉冲序列与波导分离器，组合器，和一个阵列的光纤具有可变长度，一元XPM编码的方法进行了演示。频谱编码方案可用于以16级精度实现5 GHz采样率。(C)1997年，美国光学学会。
A method to digitize the intensity of ultrashort laser pulses for high-speed optical signal processing is described. This digitization was based on the spectral broadening of a weak probe (carrier) pulse by a more intense pump (signal) pulse through the nonlinear optical process of cross-phase modulation (XPM). The signal pulse intensity was varied to generate different spectral widths that can be encoded into digital form. Using a 50-ps time-divided multiplexing pulse train with a waveguide splitter, combiner, and an array of fibers with variable lengths, a unary XPM encoding approach is demonstrated. The spectral encoding scheme can be used to achieve a 5-GHz sampling rate at a 16-level accuracy. (C) 1997 Optical Society of America.