Abstract
An avalanche photodiode (APD) with both an ultra-wide bandwidth and a high quantum efficiency is attractive for use in compact, highly-sensitive photoreceivers in optical communication systems at a wavelength of 1.55 μm. APDs with superlattice (SL) avalanche multiplication structures [1, 2, 3] are advantageous for obtaining a large gain-bandwidth (GB) product because their SL multiplication layers have high ionization-rate ratios. However, it is difficult to obtain a wide bandwidth above 20 GHz, while keeping a high quantum efficiency in conventional top- or back-illuminated SL-APDs [11] because there is a tradeoff between the quantum efficiency and the 3dB bandwidth which is limited by the carrier-transit time. On the other hand, in a photodiode with a waveguide (WG) structure, the quantum efficiency is independent of the bandwidth because the incident light and photogenerated carriers travel in different directions [4].
© 1995 Optical Society of America
PDF ArticleMore Like This
I. Watanabe, S. Sugou, H. Ishikawa, T. Anan, K. Makita, M. Tsuji, and K. Taguchi
ThG1 Optical Fiber Communication Conference (OFC) 1993
Shoichi Hanatani, Hitoshi Nakamura, Shigehisa Tanaka, Chiaki Notsu, Hirohisa Sano, and Koji Ishida
ThG3 Optical Fiber Communication Conference (OFC) 1993
H. Nie, C. Lenox, G. Kinsey, P. Yuan, A. L. Holmes, B. G. Streetman, and J. C. Campbell
TuI2 Optical Fiber Communication Conference (OFC) 1999