Three-storied optical communications module

Details Three-storied optical communications module Three-storied optical communications module

2005-01-18

2005-01-18

Assaf, Fayez (Department: 2872)

Optical waveguides

With disengagable mechanical connector

Optical fiber to a nonfiber optical device connector

C385S088000, C385S014000, C385S089000, C385S049000

Reexamination Certificate

active

06843607

ABSTRACT:
A three-storied structure optical communications module having a top case, a middle case and a bottom case which are piled and coupled in a vertical direction. The middle case has a silicon bench with M (channel number) lightwaveguides, a first WDM1, a second WDM2, M (channel number) laser diodes for generating transmitting signals λ1. The top case has a set of λ2receiving photodiodes PD1s of the channel number M. The bottom case has another set of λ3receiving photodiodes PD2s. λ2signal beams and λ3signal beams propagating in optical fibers go into the lightwaveguides on the middle case. The λ2signal beams are reflected midway on the lightwaveguides by the WDM1upward to the photodiodes PD1s on the top case and are converted into photocurrents by the photodiodes PDs. The λ3signal beams are reflected halfway on the lightwaveguides by the WDM2downward to the photodiodes PD2s and are converted into photocurrents by the photodiodes PD2s. The λ1yielded by the laser diodes make their way in the lightwaveguides, go into a multichannel fiber and propagate in the multichannel fiber. The three-storied structure allows two sets of M-channel receiving signals and a set of M-channel transmitting signals to be received or transmitted. The three-storied structure enables the module to alleviate a necessary area and reduce optical, electrical interchannel crosstalk.

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