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Coupling loss minimization of slow light slotted photonic crystal waveguides using mode matching with continuous group index perturbation

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  • We experimentally demonstrate highly efficient coupling into a slow light slotted photonic crystal waveguide. With optical mode converters and group index tapers that provide good optical mode matching and impedance matching, a nearly flat transmission over the entire guided mode spectrum of 68.8 nm range with 2.4 dB minimum insertion loss is demonstrated. Measurements also show up to 20 dB baseline enhancement and 30 dB enhancement in the slow light region, indicating that it is possible to design highly efficient and compact devices that benefit from the slow light enhancement without increasing the coupling loss.
  • This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/home.cfm. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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  • Che-Yun Lin, Alan X. Wang, Wei-Cheng Lai, John L. Covey, Swapnajit Chakravarty, and Ray T. Chen, "Coupling loss minimization of slow light slotted photonic crystal waveguides using mode matching with continuous group index perturbation," Optics Letters, 37, 232-234 (2012)
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  • 37
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  • 2
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  • The authors would like to acknowledge the Air Force Office of Scientific Research (AFOSR) for supporting this work under the AFOSR Multidisciplinary University Research Initiative (MURI) grant (Grant No. FA 9550-08-1-0394) monitored by Dr. Gernot Pomrenke and the Small Business Technology Transfer Research (STTR) program (Grant No. FA 9550-09-C-0086) monitored by Dr. Charles Y.-C. Lee.
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