Importance

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Abstract

One embodiment contemplates a polarization insensitive optical circuit constructed of an input/output signal separator, such as an optical circulator or a 1×2 or 2×2 coupler or N×M coupler, a polarization sensitive operator, and a polarization rotator reflector. In an alternate embodiment, the invention contemplates a polarization insensitive optical circuit including a polarization rotator reflector, and a polarization sensitive operator which may include, for example, a first polarization rotator, an operator/coupler, and a polarization beam combiner. Preferably, at least one of the components in the optical circuit is constructed integrally from the substrate upon which the optical circuit is based. For examples the polarization rotator and/or polarization sensitive operator may be monolithic.

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First Claim