Title :
A novel wavelength sensor using a structure of optical directional coupler
Author :
Sae-tang, K. ; Somkuarnpanit, S. ; Khuntaweetep, S.
Author_Institution :
Fac. of Eng., KMITL, Bangkok, Thailand
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.
Keywords :
finite difference time-domain analysis; optical directional couplers; optical sensors; optical variables measurement; 0.4 micron; 1.5 to 1.6 micron; 40 micron; continuous resolution; coupling efficiency; coupling length; field intensity; finite-difference time-domain; laser applications; optical communications; optical directional coupler; optoelectronics; thickness; wavelength sensor; wavelength-sensing modules; width; Directional couplers; Finite difference methods; Optical devices; Optical propagation; Optical refraction; Optical sensors; Optical variables control; Optical waveguides; Refractive index; Time domain analysis;
Conference_Titel :
Fibre and Optical Passive Components, 2002. Proceedings of 2002 IEEE/LEOS Workshop on
Print_ISBN :
0-7803-7556-4
DOI :
10.1109/FOPC.2002.1015833
