Accession Number : ADA594532


Title :   Modeling Interferometric Structures with Birefringent Elements: A Linear Vector-Space Formalism


Descriptive Note : Memorandum rept. 6 Jan-8 Dec 2013


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC PHOTONICS TECHNOLOGY BRANCH


Personal Author(s) : Frigo, Nicholas J ; Urick, Vincent J ; Bucholtz, Frank


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a594532.pdf


Report Date : 12 Nov 2013


Pagination or Media Count : 33


Abstract : We outline a formalism for modeling structures containing birefringent elements and directional couplers. The traditional description of couplers (as single polarization devices with two input and output ports) and fibers (as single port devices with two polarizations) is generalized into a four-dimensional vector space with convenient coordinate transformations between the traditional views. This enables system modelers to introduce complex elements and scenarios under a single formalism, switching between the two traditional views with a single 4 x 4 matrix transformation. We generalize an earlier formulation to include extra degrees of freedom in rotation, coupling, and birefringence matrix operators. The technique is applied to a microwave photonics setting and a quantitative description is developed that illustrates how normal mode loss in the interferometer's couplers leads to a polarization-independent phase offset in the output arms.


Descriptors :   *BIREFRINGENCE , FIBER OPTICS , INTERFEROMETERS , POLARIZATION


Subject Categories : Fiber Optics and Integrated Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE