Method, device, and system for controlling wavelength of optical

Details Method, device, and system for controlling wavelength of optical Method, device, and system for controlling wavelength of optical

1997-05-06

2000-02-29

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359187, 359124, 359161, 372 34, 371 51-, H04B 1008, H04B 1004, H04J 1402

Patent

active

060316446

ABSTRACT:
A method, device, and system for controlling the wavelength of an optical signal. For example, the system includes an E/O converter for converting an input electrical signal into an optical signal, an optical band-pass filter to which the optical signal is supplied, an O/E converter for converting the optical signal passed through the filter into an output electrical signal, a detecting unit for detecting a bit error of the output electrical signal, and a control unit for controlling a parameter (e.g., temperature of a laser diode) on which the wavelength of the optical signal depends so that the bit error detected decreases. In this system, the wavelength of the optical signal is maintained constant, so that a degradation in transmission quality due to wavelength changes is prevented.

REFERENCES:
patent: 4485475 (1984-11-01), Large et al.
patent: 5608562 (1997-03-01), Delavaux et al.
patent: 5623355 (1997-04-01), Olsen
patent: 5696859 (1997-12-01), Onaka et al.
patent: 5777773 (1998-07-01), Epworth et al.
patent: 5896201 (1999-04-01), Fukushima

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