A novel wavelength sensor using a structure of optical directional coupler

Sae-Tang, K.; Somkuarnpanit, S.; Khuntaweetep, S.

doi:10.1109/FOPC.2002.1015833

A novel wavelength sensor using a structure of optical directional coupler

Author(s)

Sae-Tang, K.

Somkuarnpanit, S.

Khuntaweetep, S.

Date Issued

January 1, 2002

Type

Conference Paper

DOI

10.1109/FOPC.2002.1015833

Abstract

The finite-difference time-domain (FDTD) is used in an analysis of the field intensity of light propagating through the structure. The device with width of 0.4 μm and thickness of 0.4 μm, which corresponding to the coupling length of 40 μm, provides a linear relationship between the coupling efficiency against wavelength. The device can sense the wavelength in a range between 1.5 μm and 1.6 μm, with continuous resolution. The wide wavelength could also be achieved by paralleling the light to a number of wavelength-sensing modules with particular required bands. Therefore, it could be employed for wavelength sensing for most optical communications, optoelectronics, laser applications etc.

Citation

Proceedings of 2002 IEEE LEOS Workshop on Fibre and Optical Passive Components Wfopc 2002, 233-237, 2002