20 September 1996 Polarization-insensitive optical fiber multichannel narrow-spacing wavelength division multiplexers
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Polarization insensitive multi-channel narrow-spacing wavelength division multiplexers (MNWDMs) based on fused and tapered single-mode optical fiber coupler are reported. The devices, operating from 1320 nm to 1520 nm, can de- /multiplex over 20 channels, with channel spacing on the order of 10 nm. The MNWDMs are fabricated from fused fiber couplers that are elongated to an isotropic point where the coupling coefficients of two polarization states are equal (Cx equals Cy). Theoretical analysis is also provided.
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Sichia Lee, Sichia Lee, QingJi Zeng, QingJi Zeng, Yong Huang, Yong Huang, } "Polarization-insensitive optical fiber multichannel narrow-spacing wavelength division multiplexers", Proc. SPIE 2893, Fiber Optic Components and Optical Communication, (20 September 1996); doi: 10.1117/12.252074; https://doi.org/10.1117/12.252074

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