Coherent time-stretch transformation for real-time capture of wideband signals

被引：20
|
作者：
Buckley, Brandon W. [1 ,2 ]
Madni, Asad M. [2 ]
Jalali, Bahram [2 ,3 ,4 ,5 ]
机构：
[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA
[4] Univ Calif Los Angeles, David Geffen Sch Med, Dept Surg, Los Angeles, CA 90095 USA
[5] Univ Calif Los Angeles, Dept Bioengn, Los Angeles, CA 90095 USA
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 18期
基金：
美国国家科学基金会;
关键词：
TO-DIGITAL CONVERTER; SYSTEMS; FIBER; MODULATION; DISPERSION; CONVERSION;
D O I：
10.1364/OE.21.021618
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Time stretch transformation of wideband waveforms boosts the performance of analog-to-digital converters and digital signal processors by slowing down analog electrical signals before digitization. The transform is based on dispersive Fourier transformation implemented in the optical domain. A coherent receiver would be ideal for capturing the time-stretched optical signal. Coherent receivers offer improved sensitivity, allow for digital cancellation of dispersion-induced impairments and optical nonlinearities, and enable decoding of phase-modulated optical data formats. Because time-stretch uses a chirped broadband (>1 THz) optical carrier, a new coherent detection technique is required. In this paper, we introduce and demonstrate coherent time stretch transformation; a technique that combines dispersive Fourier transform with optically broadband coherent detection. (C) 2013 Optical Society of America
引用
收藏
页码：21618 / 21627
页数：10
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