Title :
Electron beam direct write polymeric optical waveguide filters
Author :
Wong, W.H. ; Pun, E.Y.B.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
Waveguide wavelength filter with a first order Bragg diffraction grating was demonstrated in ENR polymer. Electron beam sensitive ENR exhibits many unique properties, and both the waveguide and the gratings were fabricated using a single exposure of electron beam. This technique eliminates alignment problems as well as possible fabrication errors,because fewer processing steps are involved. First order Bragg reflection around 1550 nm wavelength was obtained, and a transmission peak of -27 dB (>99% reflection) was obtained with a 5 mm grating length. The 3 dB transmission bandwidth was ∼0.8 nm and the 10 dB bandwidth was ∼1.0 nm. Both the electron beam dosage and the waveguide dimension can be used to fine tune the Bragg wavelength, making the electron beam direct write process suitable for the fabrication of closely spaced narrow band filters for dense WDM systems.
Keywords :
Bragg gratings; electron beam applications; electron beam effects; optical communication equipment; optical fabrication; optical polymers; optical waveguide filters; wavelength division multiplexing; 1550 nm; ENR polymer; alignment problems; closely spaced narrow band filters fabrication; dense WDM systems; electron beam; electron beam direct write polymeric optical waveguide filters; electron beam direct write process; electron beam sensitive ENR; fabrication errors; first order Bragg diffraction grating; first order Bragg reflection; grating length; processing steps; single exposure; transmission bandwidth; transmission peak; waveguide dimension; waveguide wavelength filter; Bandwidth; Bragg gratings; Electron beams; Electron optics; Optical diffraction; Optical filters; Optical polymers; Optical reflection; Optical sensors; Optical waveguides;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002
Print_ISBN :
1-55752-701-6
DOI :
10.1109/OFC.2002.1036173