Wavelength division multiplexing passive optical network system

Details Wavelength division multiplexing passive optical network system Wavelength division multiplexing passive optical network system

2007-08-07

2007-08-07

Pascal, Leslie (Department: 2613)

Optical communications

Multiplex

Broadcast and distribution system

C398S068000, C398S168000

Reexamination Certificate

active

10634509

ABSTRACT:
Disclosed is a wavelength division multiplexing passive optical network (WDM PON) system in which an optical signal outputted from a central office is injected into a Fabry-Perot laser diode (F-P LD) as the light source of an optical network unit, so that the output wavelength of the optical network unit is injection-locked at the same wavelength as that of the optical signal outputted from the central office, thereby enabling the optical network unit to output an optical signal having the same wavelength as that of the optical signal outputted from the central office. In accordance with this system, it is possible to transmit and receive forward and backward data at the same wavelength by the unit of channels. Since inexpensive F-P LDs are used as respective light sources of the central office and optical network units, it is possible to efficiently and economically implement a WDM PON system.

REFERENCES:
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patent: 2003/0142978 (2003-07-01), Lee et al.
patent: WO 03/063401 (2003-07-01), None
“A Novel Bi-Directional Add/Drop Module for Single Fiber Bi-Directional Self-Healing Wavelength Division Multiplexed Ring Networks”; Authors: Y. Zhao, X.J. Zhao, J.H. Chen, F.S. Choa and Y.J. Chen; Department of Computer Science and Electrical Engineering; pp. 183-185, 1999.
“A Low-Cost WDM Source with an ASE Injected Fabry-Perot Semiconductor Laser”; Authors: Hyun Deok Kim, Seung-Goo Kang, and Chang-Hee Lee; IEEE Photonics Technology Letters; vol. 12, No. 8; pp. 1067-1069; Aug. 2000.
“Upstream traffic transmitter using injection-locked Fabry-Perot laser diode as modulator for WDM access networks”; Authors: L.Y. Chan, C.K. Chan, D.T.K. Tong, F. Tong and L.K. Chen; Electronic Letters; vol. 38, No. 1; pp. 43-45; Jan. 3, 2002.
“Bidirectional WDM Self-Healing Ring Network Based on Simple Bidirectional Add/Drop Amplifier Modules”; Authors: C.H. Kim, Chang-Hee Lee, and Y.C. Chung; Korea Advanced Institute of Science and Technology, Department of Electrical Engineering; pp. 180-182, 1998.

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