New Very Low Noise Multilayer And Graded-Gap Avalanche Photodiodes For The 0.8 To 1 .8 Am Wavelength Region

F. Capasso; W. T. Tsang; G. F. Williams

doi:10.1117/12.933665

11 December 1982 New Very Low Noise Multilayer And Graded-Gap Avalanche Photodiodes For The 0.8 To 1 .8 μm Wavelength Region

F. Capasso, W. T. Tsang, G. F. Williams

Author Affiliations +

Proceedings Volume 0340, Future Trends in Fiber Optic Communications; (1982) https://doi.org/10.1117/12.933665
Event: 1982 Technical Symposium East, 1982, Arlington, United States

Abstract

Recent experimental and theoretical results on a new class of low noise avalanche photo-diodes are reviewed. A large enhancement of the impact ionization rates ratio (a/(3=10) has been demonstrated in AlGaAs/GaAs superlattices and graded band gap detector structures. In addition two novel photodiodes ("staircase" and "channeling" APDs) where only electrons multiply, have been proposed. The staircase APD is the solid state analog of the photo-multiplier with discrete dynodes. It has a low operating voltage (5-20 volts) and a lower excess noise factor, in the ideal case, than that of an ideal conventional APD The channeling APD is instead the solid state analog of a channeltron photomultiplier and has the unique feature of an ultrahigh a/β, ratio (≈∞) compatible with high gain (>100).

Citation Download Citation

F. Capasso, W. T. Tsang, and G. F. Williams "New Very Low Noise Multilayer And Graded-Gap Avalanche Photodiodes For The 0.8 To 1 .8 μm Wavelength Region", Proc. SPIE 0340, Future Trends in Fiber Optic Communications, (11 December 1982); https://doi.org/10.1117/12.933665

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