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Mode filter using multimode interference principles: Design and tolerance analysis for accessing waveguides supporting two guided modes
Author(s) -
Aramburu C.,
Vázquez C.,
Galarza M.,
LópezAmo M.,
Pena J. M. S.
Publication year - 2000
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/1098-2760(20000720)26:2<140::aid-mop21>3.0.co;2-o
Subject(s) - multi mode optical fiber , microwave , fabrication , interference (communication) , materials science , core (optical fiber) , mode (computer interface) , optics , wavelength , tolerance analysis , filter (signal processing) , optoelectronics , electronic engineering , engineering , optical fiber , telecommunications , computer science , physics , electrical engineering , engineering drawing , medicine , channel (broadcasting) , alternative medicine , pathology , operating system
Novel modal filters based on multimode interference have been designed to overcome the first‐order mode influence on future optical network systems fabricated with waveguides supporting two guided modes. A tolerance analysis for fabrication parameters and design rules with simple formulas are included. Specific designs are carried out in InGaAsP/InP buried waveguides. These filters have rejection ratios to first‐order mode greater than 25 dB and 0.1 dB losses at an optimum design length of 340 μm. The tolerance ranges are +0.4–0.25 μm width, −110 nm+70 nm wavelength, 20% core quaternary height, and 2% core quaternary material gap. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 26: 140–142, 2000.