Journal
OPTICS EXPRESS
Volume 21, Issue 18, Pages 21618-21627Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.021618
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Funding
- National Science Foundation through CIAN NSF ERC [EEC-0812072]
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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
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