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Spectral Efficiency Improvement in Photonic Time-Stretch Analog-to-Digital Converter via Polarization Multiplexing

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3 Author(s)
Fard, A. ; Dept. of Electr. Eng., Univ. of California Los Angeles, Los Angeles, CA, USA ; Buckley, B. ; Jalali, B.

Dual-polarization photonic time-stretch technique, which exploits polarization multiplexing to improve the spectral efficiency of the conventional photonic time-stretch technique, is proposed. This technique reduces the demand on optical bandwidth for large record length of the photonic time-stretch analog-to-digital converter. It is shown that this technique can capture high-bandwidth radio-frequency signals (>;10-GHz instantaneous bandwidth). Experimentally, 12.5-Gb/s data eye-diagram measurement using this preprocessor operating in equivalent-time mode is demonstrated.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 14 )