Solid State Science and Technology, Vol. 15, No 2 (2007) 60-65

ISSN 0128-7389

 

COUPLING RESPONSES TOWARDS WAVELENGTH AND COUPLING GEOMETRIES FOR SYMMETRIC AND ASYMMETRIC DIRECTIONAL COUPLERS

Azliza Juliana Mohd Adnan, Tengku Ahmad Imran and Zainuddin Lambak

TM Research and Development Sdn. Bhd.

43400, Selangor, Malaysia

 

ABSTRACT

The coupling responses towards wavelength and coupling geometries for symmetric and asymmetric directional couplers are discussed. Their behaviors were studied using beam propagation method (BPM). 50% 5% wavelength flattened coupling characteristics over a wide range from 1.33 μm to 1.55 μm are obtained for directional coupler with waveguide asymmetric width in the coupling region. Symmetric structure was finding its application in wavelength division multiplexer/demultiplexer and asymmetric structure has the capability for 3 dB directional coupler for broadband region.

 

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REFERENCES

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[2] Feit, M.D. and Fleck, J.A. Jr. (1981); Propagating beam theory of optical fiber cross coupling. J. Opt. Soc. Amer. vol. 71, no. 11, pp. 1361 1372.

[3] Thylen, L. (1983); The beam propagation method: Analysis of its applicability. Opt. Quantum Electron, vol. 15, pp. 433 439.

[4] Saijonmaa, J. and Yevick, D. (1983); Beam propagation analysis of loss in bent optical fibers and waveguides. J. Opt. Soc. Amer. vol. 73, no. 11, pp. 1785 1791.

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