The wavelength sensor using optical directional coupler

Author

Somkuarnpanit, S. ; Jaturuntruengsri, S. ; Kunthaweetep, S.

Author_Institution

Fac. of Eng., King Mongkut´´s Inst. of Technol., Bangkok, Thailand

Volume

1

fYear

2002

fDate

2002

Firstpage

83

Abstract

This paper proposes a wavelength sensor based on an optical directional coupler. The finite-difference time-domain (FDTD) method is used to calculate of the light intensity propagating thorough the structure, and to find the appropriate dimensions of the structure. The device with the width and thickness of 0.4 μm×0.6 μm, which corresponds to the coupling length of 40 μm, would provide a linear relationship between the coupling efficiency against the wavelengths of the transverse-magnetic-mode input. Then, the structure could be employed as a wavelength sensor for wavelength in a range between 1.5 μm and 1.6 μm, with continuous resolution.

Keywords

finite difference time-domain analysis; optical directional couplers; optical sensors; 0.4 micron; 0.6 micron; 1.5 to 1.6 micron; 40 micron; FDTD method; coupling efficiency; finite-difference time-domain analysis; light intensity calculation; optical directional coupler; transverse-magnetic-mode input; wavelength sensor; Directional couplers; Finite difference methods; Optical coupling; Optical propagation; Optical refraction; Optical sensors; Optical variables control; Refractive index; Signal resolution; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2002. Proceedings of IEEE

Print_ISBN

0-7803-7454-1

Type

conf

DOI

10.1109/ICSENS.2002.1036993

Filename

1036993