Title :
Directional couplers using fluorinated polyimide waveguides
Author :
Kobayashi, Junya ; Matsuura, Tohru ; Sasaki, Shigekuni ; Maruno, Tohru
Author_Institution :
NTT Opto-Electron. Labs., Tokyo, Japan
fDate :
4/1/1998 12:00:00 AM
Abstract :
Optical properties of directional couplers using a fluorinated polyimide waveguide were demonstrated. At a wavelength of 1.3 μm, directional couplers with the refractive index difference of 0.3% between the core and cladding have a maximum power coupling ratio of more than 97 and 96% for TE and TM polarisations, respectively. The excess loss for a 3-dB coupler was as low as 0.3 dB. Moreover, the change in the coupling ratio of the 3-dB couplers remained within 0.5% between 25 and 100°C
Keywords :
claddings; optical communication equipment; optical directional couplers; optical losses; optical polymers; optical waveguide theory; refractive index; 0.3 dB; 1.3 mum; 25 to 100 C; 3-dB coupler; TE polarisation; TM polarisation; cladding; core; coupling ratio; excess loss; fluorinated polyimide waveguide directional couplers; maximum power coupling ratio; refractive index difference; Directional couplers; Optical devices; Optical filters; Optical interferometry; Optical losses; Optical polymers; Optical refraction; Optical variables control; Optical waveguides; Polyimides;
Journal_Title :
Lightwave Technology, Journal of
