1 February 2009 Three-by-three port fused fiber grating coupler
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We experimentally demonstrate that a 3×3 port fused fiber grating coupler can be implemented by combining the technique of fabricating fused-fiber couplers as well as that of writing fiber Bragg gratings for application in all-fiber optical filters. A Bragg grating with a reflectivity of 65% is written into the coupling region of a 3×3 fiber coupler with the coupling ratios of 60, 24, and 16%, respectively, for three different output ports. This device can be applied in optical multi/demultiplexing and add/drop filters or in special optical filters.
© (2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Lung Ai, Wen-Fung Liu, Ming-Yue Fu, Tzu-Chiang Chen, Jiang-Chiou Mau, "Three-by-three port fused fiber grating coupler," Optical Engineering 48(2), 025002 (1 February 2009). https://doi.org/10.1117/1.3080745 . Submission:

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