Title :
Experimental Demonstration of All-Optical Analog-to-Digital Conversion With Balanced Detection Threshold Scheme
Author :
Peng, Yue ; Zhang, Hongming ; Wu, Qingwei ; Zhang, Yuancheng ; Fu, Xin ; Yao, Minyu
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
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.
Keywords :
analogue-digital conversion; fluctuations; high-speed optical techniques; light interference; light polarisation; optical information processing; optical modulation; optical receivers; phase modulation; photodetectors; quantisation (signal); all-optical analog-to-digital conversion; balanced detection threshold scheme; balanced photodetector; frequency 9.9 GHz; phase modulator; phase-shifted optical quantization; polarization interference; power fluctuation; receiver sensitivity; single-ended detection; sinusoidal electrical signal; spur-free dynamic range; Balanced detection; optical analog-to-digital conversion (OADC); polarization interference; threshold;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2033560
