Optical planar waveguide notch filters

Details Optical planar waveguide notch filters Optical planar waveguide notch filters

1996-08-27

1998-08-18

Lee, John D.

Optical waveguides

Planar optical waveguide

385 28, 385 15, G02B 610

Patent

active

057969060

ABSTRACT:
An optical planar waveguide notch filter employs a waveguide with first, second and third regions. The first and third regions have structures for propagating an optical signal in a first transmission mode. The second region is located between the first and third regions and has a structure in which an optical signal propagates in the first transmission mode as well as at least one other higher order transmission mode. The structure of the second region further couples a particular wavelength band of the signal propagating in the first transmission mode to at least one of the other transmission modes. This coupling causes an attenuation of energy of such bandwidth in the signal propagating in the first transmission mode. As a result, the signal propagating from the second region to the third region in the first transmission mode is a notch filtered signal possessing an attenuation at the particular wavelength band.

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