High-quality 2 x 2 and 4 x 4 wavelength-flatted couplers for sensor applications

David Jisen Xu; Yi Zhang; Xiang Zhang

doi:10.1117/12.50068

1 August 1991 High-quality 2 x 2 and 4 x 4 wavelength-flatted couplers for sensor applications

David Jisen Xu, Yi Zhang, Xiang Zhang

Proceedings Volume 1572, International Conference on Optical Fibre Sensors in China OFS(C) '91; (1991) https://doi.org/10.1117/12.50068
Event: International Conference on Optical Fibre Sensors in China, 1991, Wuhan, China

Abstract

A low-loss, high-quality 2X2 wavelength-flattered coupler (WFC) and a new 4X4 star WFC are presented. The typical excess loss of the 2X2 WFC with 50% coupling ratio is less than 0.2 dB with less than +/- 5% deviation of coupling ratio over the wavelength range from 1250 nm to 1600 nm. The typical excess loss of the 4X4 WFC is less than 0.5 dB with less than +/- 2% deviations of coupling ratio for two of the four outputs, and less than +/- 10% for the other two outputs over the wavelength range from 1250 nm to 1600 nm. The package sizes are (Phi) 5X50 mm and (Phi) 6X140 mm, respectively, for the moment.

Citation Download Citation

David Jisen Xu, Yi Zhang, and Xiang Zhang "High-quality 2 x 2 and 4 x 4 wavelength-flatted couplers for sensor applications", Proc. SPIE 1572, International Conference on Optical Fibre Sensors in China OFS(C) '91, (1 August 1991); https://doi.org/10.1117/12.50068

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