Optical frequency controlling device for ultra-dense...

Details Optical frequency controlling device for ultra-dense... Optical frequency controlling device for ultra-dense...

2008-05-06

2008-05-06

Li, Shi K (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S196000

Reexamination Certificate

active

10678191

ABSTRACT:
Disclosed is an optical frequency controlling device for ultra-dense wavelength-division-multiplexed optical channels in which center frequencies of optical channels are aligned. An optical frequency controlling device for ultra-dense wavelength-division-multiplexed optical channels of the present invention comprises an optical channel unit for outputting a plurality of semiconductor laser beams which have different center frequencies, the semiconductor laser beams forming optical channels; an optical detection unit for performing optical detection on the plurality of semiconductor laser beams outputted from the optical channel unit and generating beat frequency signals; a microwave spectrum analyzing unit for outputting spectrum information of the beat frequency signals outputted from the optical detection unit in a digital signal; and a controller for receiving an output signal of the microwave spectrum analyzing unit and controlling the center frequencies of the optical channels of the optical channel unit.

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patent: WO 01/73980 (2001-10-01), None
“Bidrectional DWDM Transmission Using a Beat-Frequency-Locking Method”; Authors: Yong-Sang Ahn, Sang-Yuep Kim, Sang-Hoon Han, Jae-Seung Lee, Sang-Soo Lee adn Wan-Seok Seo; IEEE Photonics Technology Letters, vol. 13, No. 8; Aug. 2001; pp. 899-901.

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