Mode-evolution-type optical beam combiner for coherent receivers

D. A. Smith; J. E. Baran; J. L. Jackel; R. E. Wagner; R. Welter

doi:10.1364/IPR.1991.WG4

Integrated Photonics Research
Technical Digest Series (Optica Publishing Group, 1991),
paper WG4
•https://doi.org/10.1364/IPR.1991.WG4

Mode-evolution-type optical beam combiner for coherent receivers

D. A. Smith, J. E. Baran, J. L. Jackel, R. E. Wagner, and R. Welter

Integrated Photonics Research 1991

Monterey, California United States
9–11 April 1991
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Lithium Niobate II (WG)

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D. A. Smith, J. E. Baran, J. L. Jackel, R. E. Wagner, and R. Welter, "Mode-evolution-type optical beam combiner for coherent receivers," in Integrated Photonics Research, Technical Digest Series (Optica Publishing Group, 1991), paper WG4.

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Abstract

We have used an asymmetric x-junction (ASX) as a polarization-independent sum and difference beam combiner. This component is integrable with adiabatic polarization splitters to build a fully passive integrated front end for a polarization-diversity coherent optical receiver.¹ The advantage of the adiabatic junction device over directional coupler (DC) beam combiners is tire absence of a strict interaction length required for balanced separation.

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