Transmission laser microscope using the phase-shifting technique and its application to measurement of optical waveguides

Applied Optics
J EndoHiroyuki Fujita

Abstract

A type of a transmission phase-shifting laser microscope, believed to be new, has been developed. In this microscope a biprism located between a magnifying lens and an observation plane was used as a beam splitter. The biprism is laterally translated to introduce phase shifts required for quantitative phase measurement with a phase-shifting technique. The disturbance caused by a Fresnel-diffracted wave from the splitting edge of the biprism is reduced by placement of a linear beam stopper at the center of an intermediate image plane. As the first application, the developed microscope is used to measure a refractive-index distribution in optical waveguides. A difference of refractive indices of less than 6 x 10(-5) is clearly measured in the submicrometer region.

References

Jan 1, 1988·Applied Optics·J ChenK Murata

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Citations

Oct 23, 2012·Journal of Bioscience and Bioengineering·Mutsumi Takagi, Naochika Tokunaga
Jun 29, 2012·Journal of Bioscience and Bioengineering·Mutsumi Takagi, Yuhei Shibaki
Mar 30, 2010·Journal of Bioscience and Bioengineering·Ayako TokumitsuMutsumi Takagi
Mar 5, 2013·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Ana DoblasAnabel Llavador

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