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1 August 1984Polarization Holding Directional Couplers Using D Fiber
Two different types of polarization-holding directional couplers have been made using fused D fiber. Insertion losses are as low as an estimated 0.1 db with polarization holding between 15 and 22 dB depending on the type of coupler.
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R. B. Dyott, V. A. Handerek, J. Bello, "Polarization Holding Directional Couplers Using D Fiber," Proc. SPIE 0479, Fiber Optic Couplers, Connectors, and Splice Technology, (1 August 1984); https://doi.org/10.1117/12.942763