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UV photosensitivity in a Ta2O5 rib waveguide Mach-Zehnder interferometer

UV photosensitivity in a Ta2O5 rib waveguide Mach-Zehnder interferometer
UV photosensitivity in a Ta2O5 rib waveguide Mach-Zehnder interferometer
The ultraviolet (UV) photosensitivity of Ta2O5 measured in a rib waveguide Mach-Zehnder interferometer (MZI) is reported. With a cumulative fluence of 72J/cm2 at a wavelength of 248nm incident upon one arm through a 3-mm-long window, the MZI exhibits a phase shift of 8pi radians at wavelength lambda = 1.55µm, corresponding to a saturated refractive index change of 2.1 x 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.
1041-1135
1522-1524
Tai, C.Y.
5ce36f32-5d16-4c47-971f-ce5b86092061
Grivas, C.
085534a3-9e02-4992-8882-46a95c1e5824
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Tai, C.Y.
5ce36f32-5d16-4c47-971f-ce5b86092061
Grivas, C.
085534a3-9e02-4992-8882-46a95c1e5824
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca

Tai, C.Y., Grivas, C. and Wilkinson, J.S. (2004) UV photosensitivity in a Ta2O5 rib waveguide Mach-Zehnder interferometer. IEEE Photonics Technology Letters, 16 (6), 1522-1524. (doi:10.1109/LPT.2004.826757).

Record type: Article

Abstract

The ultraviolet (UV) photosensitivity of Ta2O5 measured in a rib waveguide Mach-Zehnder interferometer (MZI) is reported. With a cumulative fluence of 72J/cm2 at a wavelength of 248nm incident upon one arm through a 3-mm-long window, the MZI exhibits a phase shift of 8pi radians at wavelength lambda = 1.55µm, corresponding to a saturated refractive index change of 2.1 x 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.

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Published date: 2004

Identifiers

Local EPrints ID: 13928
URI: http://eprints.soton.ac.uk/id/eprint/13928
ISSN: 1041-1135
PURE UUID: 594c34d0-7092-4748-819a-9874e5a38044
ORCID for J.S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

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Date deposited: 05 Jan 2005
Last modified: 18 Feb 2021 16:32

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