Title :
Design and fabrication of a significantly shortened multimode interference coupler for polarization splitter application
Author :
Hong, Jung Moo ; Ryu, Hyun Ho ; Park, Soon Ryong ; Jeong, Jae Wan ; Lee, Seung Gol ; Lee, El-Hang ; Park, Se-Geun ; Woo, Deokha ; Kim, Sunho ; O, Beom-Hoan
Author_Institution :
Sch. of Inf. & Commun. Eng., INHA Univ., Incheon, South Korea
Abstract :
We report that we have successfully designed and fabricated a significantly shortened multimode interference coupler for application in polarization splitter, using a phenomenon that we termed "quasi-state" (QS) imaging effect. First, we identified and analyzed the QS imaging effect, and, based on the QS analysis, designed and fabricated a novel multimode interference (MMI) device with its split length shortened to 1/5 of a normally designed MMI split length. The fabrication is simple and cost effective and the fabricated device shows outstanding characteristics in extinction ratio, signal homogeneity, excess loss, and tolerance in the length of the splitter.
Keywords :
optical beam splitters; optical couplers; optical design techniques; optical fabrication; optical losses; optical polarisers; MMI split length; excess loss; extinction ratio; multimode interference device; optical design; optical fabrication; optical polarization splitter; quasi-state imaging effect; signal homogeneity; significantly shortened multimode interference coupler; split length shortened; splitter length tolerance; Costs; Image analysis; Interference; Magnetic analysis; Optical device fabrication; Optical fiber polarization; Optical imaging; Optical interferometry; Optical polarization; Optical waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.805803
