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Highly Linear, Broadband Optical Modulator Based on Electro-optic Polymer Öffentlichkeit Deposited

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Abstract
  • In this paper, we present the design, fabrication and characterization of a traveling wave directional coupler modulator based on electro-optic polymer, which is able to provide both high linearity and broad bandwidth. The high linearity is realized by introducing Δβ-reversal technique in the two-domain directional coupler. A travelling wave electrode is designed to function with bandwidth-length product of 302GHz•cm, by achieving low microwave loss, excellent impedance matching and velocity matching, as well as smooth electric field profile transformation. The 3-dB bandwidth of the device is measured to be 10GHz. The spurious free dynamic range of 110dB±3Hz[superscript 2/3] is measured over the modulation frequency range 2-8GHz. To the best of our knowledge, such high linearity is first measured at the frequency up to 8GHz. In addition, a 1×2 multi-mode interference 3dB-splitter, a photobleached refractive index taper and a quasi-vertical taper are used to reduce the optical insertion loss of the device.
  • This is the author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by IEEE-Institute of Electrical and Electronics Engineers and can be found at: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994. ©2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
  • Keywords: Directional coupler, Electro-optic polymer, Traveling wave electrode, Spurious free dynamic range, Linear modulator, Δβ reversal
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  • Zhang, X., Lee, B., Lin, C., Wang, A. X., Hosseini, A., & Chen, R. T. (2012). Highly Linear Broadband Optical Modulator Based on Electro-Optic Polymer. Photonics Journal, IEEE, 4(6), 2214-2228.
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  • 4
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  • 6
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  • Financial supports from the Defense Advanced Research Projects Agency (DARPA) under Contract No. SBIR W31P4Q-08-C-0160 monitored by Dr. Devnand Shenoy is acknowledged.
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