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Realization of broad-band phase devices by using W-type eccentric-core optical fibers

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2 Author(s)
N. Kishi ; Dept. of Electron. Eng., Univ. of Electro-Commun., Tokyo, Japan ; E. Yamashita

Axially nonsymmetric W-type optical fibers are proposed as broadband phase devices for optical-fiber systems to provide the Fresnel's rhomb retarder in classical optical systems. Propagation characteristics of the W-type eccentric-core optical fibers are investigated theoretically using the boundary-integral method. The results of the numerical analysis indicate that such broadband phase devices can be realized by using the wavelength-dependent birefringence of axially nonsymmetric W-type optical fibers. It is theoretically found in the case of eccentric cores that a relative bandwidth of 18.2% with a phase retardation error of 2% is realizable without the propagation of higher-order mode waves

Published in:

Journal of Lightwave Technology  (Volume:8 ,  Issue: 8 )