Title :
Cascade optical quantization scheme for efficient resolution enhancement of all-optical ADC
Author :
Zhe Kang ; Qiang Wu ; Ye Tian ; Kavungal, Vishnu ; Chongxiu Yu ; Farrell, Gerald
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
A novel cascade optical quantization scheme for the resolution enhancement of all-optical ADC is proposed. Using a phase modulator embedded Sagnac loop and the array of splitters with specific splitting ratios, the cascade optical quantization is realized with the maximum 1.59-bit enhancement of stated-number-of-bits. Simulation results show that a 20 GHz RF signal is precisely digitalized with the spur-free dynamic range of 30.18 dBc and effective-number-of-bits of 4.22-bit.
Keywords :
Sagnac interferometers; analogue-digital conversion; optical modulation; phase modulation; quantisation (signal); all-optical ADC; cascade optical quantization scheme; effective-number-of-bits; embedded Sagnac loop; phase modulator; resolution enhancement; splitting ratios; spur-free dynamic range; stated-number-of-bits; all-optical ADC; cascade optical quantization; effective-number-of-bits; spur-free dynamic range;
Conference_Titel :
Irish Signals & Systems Conference 2014 and 2014 China-Ireland International Conference on Information and Communications Technologies (ISSC 2014/CIICT 2014). 25th IET
Conference_Location :
Limerick
DOI :
10.1049/cp.2014.0708
