Method and apparatus for a network comprising a fourier plane ph

Details Method and apparatus for a network comprising a fourier plane ph Method and apparatus for a network comprising a fourier plane ph

1998-10-23

1999-11-23

Chan, Jason

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359125, 359152, 359173, 359157, 385 33, H04J 1402, H04B 1000, H04B 1002

Patent

active

059910585

ABSTRACT:
A photonics package, and methods for its use are disclosed. In one configuration, a collimating lens is disposed between a photonics device and a ferrule containing two optical fibers. Preferably, one of the fibers delivers an optical signal to the photonics device, and the other fiber receives an optical signal from the photonics device. The fibers within the dual-fiber ferrule are located off of the optical axis of the lens so that light emanating from the signal-delivering fiber will be imaged onto the photonics device at a slight angle from the normal and may be reflected at the same angle for coupling into the signal-receiving fiber Preferably, the photonics device is situated at the Fourier plane to facilitate coupling reflected light into the signal-receiving fiber. The function of the photonics package varies with the included photonics device. For example, the package can function as a data receiver, a data transmitter and a data transceiver by incorporating, respectively, a photodetector, an optical modulator, and a transceiver. The photonics package, which can be integrated in optical communications networks, allows for incoming and outgoing signals to be handled on separate fibers, obviating the need for a splitter as required in one fiber systems. A decrease in signal loss throughout the optical communications system can thus be realized.

REFERENCES:
patent: 5552918 (1996-09-01), Krug et al.
patent: 5712864 (1998-01-01), Goldstein et al.
patent: 5767997 (1998-07-01), Bishop et al.
patent: 5790287 (1998-08-01), Darcie et al.

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