Title :
UV-written long-period gratings on polymer waveguides
Author :
Lor, Kar Pong ; Liu, Qing ; Chiang, Kin Seng
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, China
fDate :
3/1/2005 12:00:00 AM
Abstract :
We report an ultraviolet (UV)-writing technique for the fabrication of a long-period waveguide grating on a benzocyclobutene ridge waveguide coated with epoxy (UV 11-3), where the grating is formed by exposing the waveguide to 248-nm UV pulses emitted from a KrF excimer laser through an amplitude mask. The UV pulses produce both index modulation and corrugation on the epoxy cladding, and their combined effect gives rise to the observed transmission spectrum. We also highlight the effects of UV-induced nonuniformity along the grating by simulation and measure the temperature sensitivity of the resonance wavelength of the grating.
Keywords :
claddings; diffraction gratings; excimer lasers; high-speed optical techniques; infrared spectra; laser materials processing; optical fabrication; optical films; optical filters; optical modulation; optical polymers; optical waveguide components; optical waveguides; ridge waveguides; ultraviolet radiation effects; 248 nm; KrF; KrF excimer laser; UV pulses; UV-induced nonuniformity; UV-writing technique; UV-written gratings; amplitude mask; benzocyclobutene waveguide; epoxy cladding; epoxy-coated waveguide; index modulation; long-period gratings; optical fabrication; optical waveguide filters; polymer waveguides; resonance wavelength; ridge waveguide; temperature sensitivity; transmission spectrum; Gratings; Optical device fabrication; Optical pulses; Polymers; Pulse modulation; Resonance; Temperature measurement; Temperature sensors; Waveguide lasers; Wavelength measurement; Long-period gratings; optical polymer waveguides; optical waveguide filters; optical waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.840918
