Title :
2.5 Gbps CMOS laser diode driver with APC and digitally controlled current modulation
Author :
Lin, ChihHsien ; Yao, I-Chen ; Kuo, Chun-Cheng ; Jou, Shyh-Jye
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-li, Taiwan
Abstract :
This laser diode driver operates at 2.5 Gbps. It contains a driver, a reference voltage generator, an automatic power control circuit and digitally controlled blocks of bias current and modulation current. The TSMC 0.35 μm 1P4M CMOS digital process is used to fabricate this chip. APC is used to maintain the laser diode output power and it works when photodetector gain ranges from 1/80 to 1/120. A dynamic pull-up and pull-down circuit of the output driver is used to improve the eye diagram. The experimental results demonstrate that it works at 2.5 Gbps and the APC digital control blocks of bias current and modulation current also work well.
Keywords :
CMOS digital integrated circuits; driver circuits; integrated circuit design; integrated circuit measurement; modulation; power control; reference circuits; semiconductor lasers; surface emitting lasers; 0.35 micron; 2.5 Gbit/s; APC; APC digital control blocks; CMOS laser diode driver; TSMC 1P4M CMOS digital process; VCSEL laser diode; automatic power control circuit; digitally controlled bias current blocks; digitally controlled current modulation; digitally controlled modulation current blocks; dynamic output driver pull-up/pull-down circuit; eye diagram; laser diode output power; photodetector gain; reference voltage generator; Automatic control; Automatic generation control; Automatic voltage control; Digital control; Digital modulation; Diode lasers; Driver circuits; Optical control; Power control; Power generation;
Conference_Titel :
ASIC, 2002. Proceedings. 2002 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-7363-4
DOI :
10.1109/APASIC.2002.1031536
