Analysis of optical filtering in waveguides with a high index modulation using the extended coupled mode theory by hybridization of a matrix method

OPTICS COMMUNICATIONS

卷:289

Article

Ghoumid, K.^1,2  Elhechmi, I.³  Mekaoui, S.⁴  Pieralli, C.¹  Gharbi, T.³ 

[1] ENSAO, Oujda 60000, Morocco

[2] Univ Franche Comte, UMR CNRS 6174, Inst Femto ST Dept LOPMD, F-25030 Besancon, France

[3] Univ Franche Comte, Nanomed Lab, F-25030 Besancon, France

[4] LCPTS Telecommun, Fac Elect & Informat, Algiers 16111, Algeria

关键词: Waveguide index modulation;    Optical filtering;    Diffraction grating;    Coupled mode theory;    Matrix method;   

DOI  :  10.1016/j.optcom.2012.10.008

来源: Elsevier

【 摘 要 】

In this paper the authors present an hybrid approach for the analysis of the optical filtering function in corrugated waveguide filters with a high index modulation. This approach is based on the hybridization of the extended couple mode theory (CMT) with the transfer matrix approach. The authors chose to treat the case of high index corrugation because in this case the theory elaborated before is not rigorously applicable. The proposed approach allows the calculation of the reflection coefficient and the full width at half maximum (FWHM) for any index modulation scheme. The hybridization of both methods mentioned above explains the impact and effects of opto-geometric parameters on the reflection coefficient and the bandwidth at mid-height. The theoretical results are verified by experimental measurements realized on Ti:LiNbO3 waveguides with a high index modulation experimentally implemented by engraving using Focused Ion Beam (FIB) process. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free