Abstract
Coupling loss occurs between a standard single-mode fiber and a silica waveguide when the difference between the refractive indices of the core and the cladding of the silica waveguide is high. We designed a Y-branch structure for use as a spot-size converter to reduce this coupling loss. The structure was tested with a three-dimensional beam-propagation method and was shown to exhibit a significantly reduced coupling loss, a low polarization-dependent loss, and a good tolerance of imprecision in fabrication. No additional fabrication steps are required for this proposed spot-size converter.
© 2004 Optical Society of America
Full Article | PDF ArticleMore Like This
Qian Wang, Jun Lu, and Sailing He
Appl. Opt. 41(36) 7644-7649 (2002)
Marko Galarza, Kurt De Mesel, Roel Baets, Alfredo Martínez, Cándido Aramburu, and Manuel López-Amo
Appl. Opt. 42(24) 4841-4846 (2003)
Sujith Chandran, Meenatchi Sundaram, Sreevatsa Kurudi, and Bijoy Krishna Das
Appl. Opt. 56(6) 1708-1716 (2017)