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Kaoru Nakajima Author
Subjects of specialization
Affiliation
Tachnoeconomic Forecasting
Japan Women
Biography
Kaoru Nakajima has received her Bachelor’s degree from Japan Women’s university in 1991. She was a researcher at Fujitsu labratory LTD in Japan for over 13 years, where she was engaged in researching semiconductor lasers, design of LSI, POF transmission experiment using LN external modulator, and biosensors. She has received M.S. degrees in 2007 from Japan Women’s university. She has been in a doctoral course from 2007 to 2010,
Publications
Special Issue Article Open Access
Derivation of coupling coefficients and grating thickness, and control of spectral and angular bandwidths concerning volume phase gratings with a variety of refractive index distributions
Author(s): Kaoru Nakajima
The equations for the coupling coefficient and the grating thickness of volume phase gratings are derived from Maxwell’s equations in this work. The equations cover all graded types of refractive index distributions (RIDs) which change continuously from a triangular type to a rectangular type in the Bragg regime. The functions expressed as various graded types of RIDs, which are proposed in this work, are used among them. Furthermore, the new idea, which is the correlative coupling-length coefficient, is devised for the first time as a variety of RID function, “G-factor”. The results based on the coupled-mode theory in this work show a very close agreement under 0.2 % with the results of the rigorous coupled wave analysis method. The values of the grating thickness and... view more»
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