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

页码：21618 / 21627

页数：10

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