Title :
Monolithic eight-wavelength demultiplexed receiver for dense WDM applications
Author :
Chandrasekhar ; Zirngibl, M. ; Dentai, A.G. ; Joyner, C.H. ; Storz, F. ; Burrus, C.A. ; Lunardi, L.M.
Author_Institution :
Crawford Hill Lab., AT&T Bell Labs., Holmdel, NJ, USA
Abstract :
A single chip incorporating a waveguide grating router and eight p-i-n photodetectors followed by eight preamplifiers constructed from heterojunction bipolar transistors, has been realized. The chip can demultiplex eight wavelengths spaced 100 GHz (0.81 nm) apart with nearest neighbor crosstalk better than -15 dB. The external quantum efficiency for each of the eight wavelength demultiplexed photodetectors was 5-8% (a responsivity of 0.06-0.10 A/W) and each optical front end operated up to 2.5 Gb/s. This is the first demonstration of monolithic integration of electronic circuits with a wavelength demultiplexer.<>
Keywords :
bipolar integrated circuits; integrated optoelectronics; multiplexing equipment; optical crosstalk; optical receivers; photodetectors; preamplifiers; telecommunication network routing; wavelength division multiplexing; 2.5 Gbit/s; 5 to 8 percent; dense WDM applications; electronic circuits; external quantum efficiency; heterojunction bipolar transistors; monolithic eight-wavelength demultiplexed receiver; monolithic integration; nearest neighbor crosstalk; optical front end; p-i-n photodetectors; preamplifiers; responsivity; single chip; waveguide grating router; wavelength demultiplexed photodetectors; wavelength demultiplexer; Gratings; Heterojunction bipolar transistors; Nearest neighbor searches; Optical crosstalk; Optical receivers; Optical waveguides; PIN photodiodes; Photodetectors; Preamplifiers; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
