Time-warp correction and calibration in photonic time-stretch analog-to-digital converter

被引：43
|
作者：
Gupta, Shalabh [1 ]
Jalali, Bahram [1 ]
机构：
[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA
来源：
OPTICS LETTERS | 2008年 / 33卷 / 22期
关键词：
D O I：
10.1364/OL.33.002674
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We show how time warps caused by nonuniform wavelength-to-time mapping in the photonic time-stretch analog-to-digital converter (ADC) can be digitally measured and removed. This is combined with digital correction of wavelength-dependent Mach-Zehnder modulator (MZM) bias offset to attain a 10 GHz bandwidth digitizer with >7 effective bits of resolution and 52 dB spur-free dynamic range. To the best of our knowledge, this is the highest resolution ADC in 10 GHz bandwidth range, with at least 1 order of magnitude higher signal-to-noise ratio than ever achieved. We also demonstrate concatenation of 30 wavelength interleaved time segments with high fidelity on the path to achieving continuous time operation. (C) 2008 Optical Society of America
引用
收藏
页码：2674 / 2676
页数：3
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