Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1987-06-29
1990-01-09
Mintel, William A.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
357 19, 357 16, 333248, H01L 2714
Patent
active
048931624
ABSTRACT:
An integrated semiconductor arrangement of the coupling type between a photodetector D and a light wave guide G.sub.1, operating in a band of given wavelengths, containing on the surface of a semiconductor substrate S of a III-V compound one after the other a confining layer C.sub.0 of III-V compound and a transparent layer C.sub.1 of a III-V compound for the operating wavelengths having an index superior to that of the confining layer, the light waveguide G.sub.1 being realized in layer C.sub.1, and also containing an absorbing layer C.sub.3 of a III-V compound for the operating wavelengths having an index superior to that of the waveguide, in which layer C.sub.3 the photodetector is realized, characterized in that the absorbing layer C.sub.3 is deposited on top of the transparent layer C.sub.1 such that the photodetector is formed on the surface of the light wave guide G.sub.1 and coupled to the latter in parallel with its axis over a given coupling length L.sub.2 of which is a function the amount of light issued by the guide and received by the photodetector. This arrangement can also include, deposited between the transparent layer C.sub.1, hereinafter called first transparent layer and the absorbing layer C.sub.3, a second transparent layer C.sub.2 of a III-V compound for the operating wavelengths having an index lying between that of the first transparent layer C.sub.1 and that of the absorbing layer C.sub.3.
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R. Tommer, "Monolithic InGaAs Photodiode Array . . . ", Electronics Letters, vol. 21, No. 9, pp. 382-383, Apr. 25, 1985.
J. Brandon et al., "Double Heterostructure GaAs-Alx Gal-xAs Rib Waveguide . . . ", Second European Conference on Integrated Optics, Oct. 1983.
Erman Marko
Gentner Jean-Louis
Botjer William L.
Mintel William A.
U.S. Philips Corp.
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