Title :
A 3-Vppd 730-mW Linear Driver IC Using InP HBTs for Advanced Optical Modulations
Author :
Nagatani, Munehiko ; Bouvier, Y. ; Nosaka, Hideyuki ; Murata, Kentaro
Author_Institution :
NTT Photonics Labs., NTT Corp., Atsugi, Japan
Abstract :
This paper presents a 3-Vppd 730-mW linear optical modulator driver IC for advanced modulations suitable for optical communications systems operating at 100-Gb/b/ch and beyond. The driver was designed and fabricated using 0.5-um-emitter InP HBT technology, which yields a peak ft of 290 GHz, a peak fmax of 320 GHz, and BVceo of approximately 4 V. The linear driver has a two-stage lumped configuration comprising a variable-gain amplifier (VGA) and an output cascode amplifier. It provides linear differential output amplitude of up to 3 Vppd and consumes only 730 mW. It has a large bandwidth of 37.8 GHz and a maximum differential gain of 16.2 dB with 6-dB variable gain range. Total harmonic distortion (THD) is as low as 1.2% at 1 GHz and better than 3.8% up to 16 GHz. The driver provides very clear binary and multilevel output and can be applied to optical transmissions of 100-Gb/s/ch and beyond.
Keywords :
amplifiers; driver circuits; harmonic distortion; heterojunction bipolar transistors; indium compounds; light transmission; optical modulation; HBT; InP; THD; VGA; advanced optical modulations; binary output; bit rate 100 Gbit/s; frequency 290 GHz; linear differential output amplitude; linear driver IC; linear optical modulator driver IC; maximum differential gain; multilevel output; optical communications systems; optical transmissions; output cascode amplifier; power 730 mW; total harmonic distortion; two-stage lumped configuration; variable-gain amplifier; Gain; High-speed optical techniques; Indium phosphide; Integrated circuits; Integrated optics; Optical modulation;
Conference_Titel :
Compound Semiconductor Integrated Circuit Symposium (CSICS), 2013 IEEE
Conference_Location :
Monterey, CA
DOI :
10.1109/CSICS.2013.6659193
