Title :
A monolithic optical receiver chip for free space visible light communication system
Author :
Beiju Huang ; Hongda Chen
Author_Institution :
State Key Lab. on Integrated Optoelectron., Inst. of Semicond., Beijing, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
This paper describes the monolithic optical receiver chip for next generation LED based free space optics (FSO) communication system. The chip integrates both photodetector array and receiver circuits. The photocurrent of photodetector array is 0.02μA at 1000Lux without bias and increases to 15μA at100Lux and 14.8V bias, which attribute to the avalanche multiplication process. The transimpedance amplifier (TIA) exploits regulated cascode structure to isolate the big parasitic capacitance´s influence on bandwidth deterioration. The bandwidth and transimpedance gain is 100MHz and 75dBΩ at 0.5nF parasitic capacitance of photodetector array. The transmission rate of 15Mbps is demonstrated with simple OOK modulation.
Keywords :
amplitude shift keying; avalanche photodiodes; light emitting diodes; next generation networks; operational amplifiers; optical modulation; optical receivers; photoconductivity; photodetectors; photoemission; sensor arrays; FSO; OOK modulation; TIA; avalanche multiplication process; bandwidth 100 MHz; bit rate 15 Mbit/s; capacitance 0.5 nF; cascode structure regulation; current 0.02 muA; current 15 muA; free space optics communication system; free space visible light communication system; gain 75 dB; monolithic optical receiver chip circuit; next generation LED; parasitic capacitance isolation; photocurrent; photodetector array; transimpedance amplifier; voltage 14.8 V; Arrays; Bandwidth; Light emitting diodes; Optical filters; Optical receivers; Photodetectors; Free Space Optics (FSO); Transimpedance Amplifier (TIA); Visible Light Communications (VLC); optical receiver; silicon photodetector;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6467906
