Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1989-03-03
1991-04-16
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455608, 455611, H04B 1000
Patent
active
050089579
ABSTRACT:
An optical signal transmitter controls the intensity of a light which is transmitted over an optical fiber. The transmitter splits a light beam into two substantially equal parts which pass through two separate paths in a LiNbO.sub.3 substrate. The intensity of the light is separately switched back and forth between high and low intensitites in response to binary electrical signals. At the output ends of the two paths, the signals are recombined and sent over an optical fiber. The resultant recombined signal is a three level signal of (a) the light in both paths at a low level, (b) the light in one path at a high level and in the other path at a low level, and (c) the light in both paths at a high level.
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"32 Switch-Elements Integrated Low-Crosstalk LiNbO.sub.3 4.times.4 Optical Matrix Switch," by M. Kondo et al., Proceedings of International Conference '85, pp. 361-364.
Eisenzopf Reinhard J.
NEC Corporation
Sutcliffe Geoff
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