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Vectorial analysis of triple rib guide heterostructures as wavelength duplexers
Author(s) -
Stuwe Peter,
Unger HansGeorg
Publication year - 1991
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/mop.4650041117
Subject(s) - duplexer , bandwidth (computing) , polarization (electrochemistry) , materials science , optics , optoelectronics , wavelength , photonic crystal , wideband , physics , engineering , electrical engineering , telecommunications , chemistry , antenna (radio)
An integrated optical duplexer with three rib waveguides is investigated theoretically by a two‐dimensional mode‐matching technique with modal fields obtained by the method of lines. The results are compared with those of a one‐dimensional analysis and show the range of applicability of the effective index method. An optimized duplexer for separation of the 1.3‐μm band from the 1.55‐μm band is only 290 μm long and has a 1‐dB bandwidth of 0.15 μm. A complete one‐dimensional mode expansion shows that radiation has no significant influence on the duplexer characteristics. They are also nearly independent of polarization.