Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1986-03-18
1989-01-10
Tarcza, Thomas H.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
350 9614, G02F 103
Patent
active
047976411
ABSTRACT:
An optoelectronic modulator for generating an optical signal in which a wafer (10) of optoelectronic material has two parallel light wave conductors (13a,13b) and three planar electrodes (14a,14b,14c). The latter are arranged so that two electrodes adjacent each other define by their long sides an elongate intermediate space with at most three sections, which are transversely displaced in relation to each other. One long side of one of the sections is situated approximately in the line of extension of the other long side in an adjacent section and the lightwave conductors (13a,13b) are situated in the extension lines. The lightwave conductors are modulated in counter-phase in two adjacently situated sections by a modulating alternating voltage (U) which is connected to the electrodes. The ratio between the length (L.sub.1) of the longest section and the length (L) of the electrodes is in the range of 0.70 to 0.95. By the electrode configuration, the modulator is given high upper boundary frequency and good pulse response.
REFERENCES:
patent: 4070094 (1978-01-01), Martin
patent: 4198116 (1980-04-01), Papuchon
patent: 4251130 (1981-02-01), Marcatili
patent: 4266850 (1981-05-01), Burns
patent: 4288785 (1981-09-01), Papuchon et al.
patent: 4340272 (1982-07-01), Papuchon et al.
patent: 4381139 (1983-04-01), Alferness
patent: 4448479 (1984-05-01), Alferness
"Band Pass Response Travelling Wave Modulator With Transit Time Difference Compensation", IEE, London, England, VIII+194 pp., p. 3, 1983.
Hellner Mark
Tarcza Thomas H.
Telefonaktiebolaget L M Ericsson
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