Electrooptic polymer modulator with single-mode to multimode waveguide transitions

Christopher T. DeRose, David Mathine, Yasufumi Enami, Robert A. Norwood, Jingdong Luo, Alex K.Y. Jen, Nasser Peyghambarian

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Grayscale lithography has been used to create refractive index (RI) tapers in an electrooptic (EO) polymer modulator. These RI tapers are used to convert a passive single-mode photobleached polymer waveguide to the fundamental mode of an unbleached, active multimode polymer waveguide. The benefits of this modulator design include a coupling loss reduction of 2.6 dB per interface and an increased confinement factor of 0.83. Using this design, an EO polymer modulator was fabricated with a halfwave voltage of 1.9 V, modulation extinction ratio of 15 dB, and a fiber to lens insertion loss of 11.6 dB.

Original languageEnglish (US)
Pages (from-to)1051-1053
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number12
StatePublished - Jun 15 2008


  • Electrooptic (EO) polymer
  • Grayscale lithography
  • Modulator
  • Sol-gel

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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