Electro-Optic Long Period Grating Based on Ti : LiNbO3 Optical Waveguide

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Article number7247649
Pages (from-to)2555-2558
Journal / PublicationIEEE Photonics Technology Letters
Volume27
Issue number24
Publication statusPublished - 15 Dec 2015

Abstract

We demonstrate electro-optic long period grating in Ti:LiNbO3 strip waveguide embedded in a planar waveguide. The device was fabricated starting from a Z-cut congruent plate with a technological process in sequence of planar waveguide, strip waveguide, SiO2 buffer layer, and periodical electrode. The rejection band of the device with a grating pitch 675 μ m is observed at the 1.1-1.3-μ m wavelength regime with a maximum contrast of 27 dB under the 360 V driving voltage. It is found that the band red-shifts linearly with the voltage increase. The shift is ∼ 160nm as the voltage is increased from 100 to 500 V and lasts 1 min. Accompanying the shift, the contrast reduces. The shift is attributed to different photorefraction effects in planar and strip waveguides. Higher than 360 V, the contrast decreases due to photorefraction effect and over-coupling phenomenon.

Research Area(s)

  • band shift, electro-optic effect, Long period grating, photorefraction effect, Ti:LiNbO3 waveguide

Citation Format(s)

Electro-Optic Long Period Grating Based on Ti : LiNbO3 Optical Waveguide. / Kang, Jian; Wong, Wing-Han; Pun, Edwin Yue-Bun; Zhang, De-Long.

In: IEEE Photonics Technology Letters, Vol. 27, No. 24, 7247649, 15.12.2015, p. 2555-2558.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review