DocumentCode :
1466085
Title :
Incoupling waveguide hologram with reduced polarization sensitivity
Author :
Backlund, Johan ; Bengtsson, Jorgen ; Carlstrom, Carl-Fredrik ; Larsson, Anders
Author_Institution :
Dept. of Microelectron., Chalmers Univ. of Technol., Goteborg, Sweden
Volume :
11
Issue :
2
fYear :
1999
Firstpage :
227
Lastpage :
229
Abstract :
An incoupling waveguide hologram (IWGH) with significantly reduced polarization sensitivity was designed and fabricated in InP for 1550 nm wavelength. The IWGH couples the light from an optical fiber, irrespectively of the state of polarization, into the InP waveguide and simultaneously focuses it to a desired position in the waveguide. Conventional IWGHs are strongly polarization sensitive with a measured 19 dB difference in the incoupling efficiency between the TE and TM mode. In contrast, although some design parameters turned out to be slightly in error, the fabricated IWGHs designed for reduced polarization sensitivity exhibited a 3.1 dB difference in the incoupling efficiency between the TE and TM modes.
Keywords :
III-V semiconductors; holographic gratings; indium compounds; integrated optics; optical communication equipment; optical design techniques; optical fibre couplers; optical waveguides; sensitivity; 1550 nm; InP; InP waveguide; incoupling efficiency; incoupling waveguide hologram; optical design parameters; optical fiber light coupling; optical focusing; reduced polarization sensitivity; significantly reduced polarization sensitivity; state of polarization; strongly polarization sensitive; Gratings; Indium phosphide; Laboratories; Optical coupling; Optical fiber polarization; Optical fibers; Optical surface waves; Optical waveguides; Surface waves; Tellurium;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/68.740712
Filename :
740712
Link To Document :
بازگشت