Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1984-09-25
1986-03-18
Davie, James W.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
350 9615, 357 16, 357 19, 250205, 455612, H01L 2714
Patent
active
045772096
ABSTRACT:
A single-wavelength, bidirectional fiber optic transmission system is described in which at each terminal the output radiation of a light source (LED or semiconductor laser) is coupled through a small diameter hole in the active area of a photodiode into the core of a larger diameter transmission fiber. On the other hand, radiation propagating through the fiber in the opposite direction exits from the fiber with a large NA so that most of it is incident on the active area of the photodiode and little is lost through the hole. Also described are a number of photodiode configurations for use in such a system, as well as dual photodiodes to perform both signal detection and output monitoring functions.
REFERENCES:
patent: 3877060 (1975-04-01), Shono et al.
patent: 4181901 (1980-01-01), Heyke
patent: 4292512 (1981-09-01), Miller et al.
"Optical Two-Way TV Transmission", Optics Letters, vol. 4, No. 1, (Jan. 1979), pp. 24-26, H. Takahashi et al.
"Photoelectrochemical Etching of p-GaAs", Appl. Phys. Lett., vol. 39, No. 1, Jul. 1981, pp. 76-78, F. W. Ostermayer, Jr. et al.
"Crosstalk in a Bidirectional Optical Fiber", Fiber and Integrated Optics, vol. 1, No. 3, pp. 283-286, (1978), H. Wells.
"P S-Noted in Passing-Communication Research", Laser Focus, (May 1978), p. 109.
Forrest Stephen R.
Panock Richard L.
AT&T Bell Laboratories
Davie James W.
Epps Georgia Y.
Urbano Michael J.
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