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An Ultra-Broadband Fiber Grating Coupler with Focusing Curved Subwavelength Structures

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Abstract

We demonstrate the first fiber grating coupler with focusing curved subwavelength structures. An ultra-wide 1-dB bandwidth of over 100 nm with -6.7 dB coupling efficiency at 1550 nm has been experimentally achieved.

© 2014 Optical Society of America

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