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Proceedings Paper

Integrated optical TE/TM mode splitter using directional coupler
Author(s): Jianmin Cui; Lihui Feng; Fang Cui; Yunan Sun
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Paper Abstract

In the coming new general optical network, tunable filter is one of important optical devices, and can be used to compose dynamically optical add/drop multiplexer (OADM). Polarization independent integrated acousto-optic tunable filter (IAOTF) is one of devices which have most potential to perform the function[1][2]. Mode splitting and merging are realized by using two symmetrically directional couplers in the IAOTF. Mode polarization is converted by the acousto-optic mode converter when the condition of phase matching is met at the specifically light wavelength. The light wavelength passing the filter can be easily adjusted by changing the frequency of acoustic wave. The Ti diffused technology is adopted to fabricate the device on the X-cut Y propagation LiNbO3 slice. The relation of index difference in the X-cut Y propagation LiNbO3 waveguide with different diffusion conditions is computed in this paper. And the theory of coupling mode is utilized to analyze and design the directional coupler, in which TE/TM mode splitting can be realized. The designed structure is simulated by using BPM software. The extinction ratio of TE/TM mode can be reached 25. 1 dB and 24.9 dB respectively.

Paper Details

Date Published: 28 August 2002
PDF: 5 pages
Proc. SPIE 4904, Optical Fiber and Planar Waveguide Technology II, (28 August 2002); doi: 10.1117/12.481266
Show Author Affiliations
Jianmin Cui, Beijing Institute of Technology (China)
Lihui Feng, Beijing Institute of Technology (China)
Fang Cui, Beijing Institute of Technology (China)
Yunan Sun, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 4904:
Optical Fiber and Planar Waveguide Technology II
Shuisheng Jian; Steven Shen; Katsunari Okamoto, Editor(s)

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