A Novel Variable Optical Attenuator for Fiber Optical Communication
A novel variable optical attenuator based on buried polymer waveguides and waveguide bends is proposed. The attenuator consists of three waveguide sections, separated for waveguide bending by two embedded micorprisms.
The attenuation of device was achieved by steering the beam propagation direction in the waveguide by thermo-optical effects. Detailed simulation results using the Beam Propagation Method are presented. In addition, radiation losses of the waveguide bends are experimentally investigated. After two-10¢X bends, the normalized insertion losses as low as 65.7¢H are obtained. The propagation loss of the buried waveguide is 0.47dB/cm at l=1.3 mm.
Advisor:Ken-Huang Lin; Hung-Wen Chang; An-Kuo Chu
School:National Sun Yat-Sen University
School Location:China - Taiwan
Source Type:Master's Thesis
Keywords:waveguide bend bcb
Date of Publication:06/11/2002