Coupling coefficient of two-core microstructured optical fiber

✍ Scribed by X. Yu; M. Liu; Y. Chung; M. Yan; P. Shum

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 431 KB
• Volume: 260
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2005.10.040

✦ Synopsis

In this paper, coupled-mode theory is applied to a two-core microstructured optical fiber for the first time to calculate the coupling coefficients for different fiber structures by employing a simple effective index model approach. The dependence of the mode coupling properties upon the geometrical parameters of the two-core structures (air-hole arrangement, hole size, and pitch size) and wavelength are evaluated systematically. The effective index coupled-mode theory is compared with the finite-element method based super-mode theory in details and the results show good agreement. The coupling characteristics are proven to be insensitive to the longitudinal strain by considering the photoelastic effects.