UV photosensitivity in a Ta2O5 rib waveguide Mach-Zehnder interferometer

Chao Yi Tai, Christos Grivas, James S. Wilkinson

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The ultraviolet (UV) photosensitivity of Ta2O5 measured in a rib waveguide Mach-Zehnder interferometer (MZI) is reported. With a cumulative fluence of 72 J/cm2 at a wavelength of 248 nm incident upon one arm through a 3-mm-long window, the MZI exhibits a phase shift of 8π radians at wavelength λ = 1.55 μm, corresponding to a saturated refractive index change of 2.1 × 10-3. Real time measurements of the MZI output during exposure are given and the UV-induced refractive index change is found to be negative.

Original languageEnglish
Pages (from-to)1522-1524
Number of pages3
JournalIEEE Photonics Technology Letters
Volume16
Issue number6
DOIs
StatePublished - Jun 2004

Keywords

  • Integrated optics
  • Mach-Zehnder interferometer (MZI)
  • Photosensitivity
  • Planar lightwave circuits

Fingerprint

Dive into the research topics of 'UV photosensitivity in a Ta2O5 rib waveguide Mach-Zehnder interferometer'. Together they form a unique fingerprint.

Cite this