Hybrid optical filtering circuit

Details Hybrid optical filtering circuit Hybrid optical filtering circuit

G - Physics

02

B

G02B 5/26 (2006.01) G02B 6/34 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2211781

A hybrid filter includes a dichroic interference WDM filter closely coupled with a Bragg grating. Preferably the Bragg grating is housed within a sleeve having an end face that is directly coupled with an end face lens of the WDM interference filter. The entire filter can be placed within a single housing and temperature controlled. Etalon effects are lessened by placing the Bragg grating as close as possible to the WDM filter. Multiple hybrid filters of this type optically coupled to an optical circulator provided multi-channel demultiplexing.

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