Record bandwidth, spectrally flat coupling with microbend gratings in dispersion-tailored fibers |
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| Authors: | S. Ramachandran M.F. Yan E. Monberg F.V. Dimarcello P. Wisk S. Ghalmi |
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| Affiliation: | OFS Labs., Murray Hill, NJ, USA; |
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| Abstract: | We demonstrate resonant grating couplers with the broadest bandwidth (565 nm) reported to date, using microbend gratings in dispersion-optimized few-mode fibers. Control of modal dispersion enables the demonstration of spectrally flat (< 0.25-dB ripple) coupling. This enables a compact (1 cm), broad-band (110 nm) variable optical attenuator, which is highly cost-effective, since device assembly simply involves pressing an as-drawn fiber between two corrugated blocks. |
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