Optical transmitter

Details Optical transmitter Optical transmitter

1996-12-03

1998-02-24

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

257 83, H04B 1004

Patent

active

057214565

ABSTRACT:
An optical transmitter in which a light-emitting device is driven by a differential circuit. Reflected waves occurring near the light-emitting device affect an FET of the output stage, which leads to degradation of its optical output waveforms. In order to resolve this problem, a reflection absorbing circuit is connected between the light-emitting device and the FET of the output stage. As the reflection absorbing circuit, a resistor or a resistor connected in series to a capacitor is used. A bipolar transistor may be used in place of an FET.

REFERENCES:
patent: 5343323 (1994-08-01), Lynn et al.
patent: 5398008 (1995-03-01), Nissler et al.
Suzaki, T. et al, "High-spped modulation characteristics of LD driver Ics with DMTs," 1989 IEICE (Institute of Electronics, Information and Communication Engineers, Autumn Conference), p. B-445 (with its English language translation).
Suematsu, Yasuharu and Hong, Tchang-Hee, "Suppression of Relaxation Oscillation in Light Output of Injection Lasers by Electrical Resonance Circuit", IEEE Journal of Quantum Electronics, vol. QE-13, No. 9 (Sep. 1977), pp. 756-762.

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