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Optica Publishing Group
  • Optical Fiber Communication Conference
  • 1996 OSA Technical Digest Series (Optica Publishing Group, 1996),
  • paper TuM6

Very narrow linewidth tunable distributed Bragg reflector photodetector

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Abstract

Space, time, and wavelength-division multiplexing schemes are projected to play pivotal roles in the rapidly expanding area of optical communication systems for large volume and high speed information transfer. Multiple wavelength systems require high-speed, tunable electro-optic components with capability for subnanometer signal channel resolution. In this context, the intrinsic narrow bandwidth nature of feedback resonance makes it an attractive device concept for implementation in a wide range of tunable optoelectronic devices. While a number of tunable lasers1 and resonant cavity wavelength filters2,3 have been demonstrated, very little work has been done on development of complementary tunable photodetectors. This is because in conventional photodetectors, the optical and electrical paths are collinear. The electrical path length in the photodetector is limited by the temporal bandwidth requirements of the optical communication system. Consequently, the optical path length available for resonance tuning is small. This tuning limitation can be overcome by using a horizontal, waveguiding resonant cavity with an orthogonal electrical path.

© 1996 Optical Society of America

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