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Experimental Demonstration of All-Optical Analog-to-Digital Conversion With Balanced Detection Threshold Scheme

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6 Author(s)
Yue Peng ; Dept. of Electron. Eng., Tsinghua Univ., Beijing, China ; Hongming Zhang ; Qingwei Wu ; Yuancheng Zhang
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A novel balanced detection threshold scheme for all-optical analog-to-digital conversion is experimentally demonstrated. A 4-bit 10-GSamples/s all-optical analog-to-digital converter based on phase-shifted optical quantization and a balanced detection threshold scheme is realized to quantize a 9.9-GHz sinusoidal electrical signal, achieving a spur-free dynamic range of 24.2 dB. Compared with single-ended detection, the quantization result is improved with the balanced threshold scheme due to reducing the influence of the power fluctuation and improving the receiver sensitivity.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 23 )