Improved coupling efficiency using /spl Delta/n-controlled polymer waveguides with two-dimensional spot-size transformation
- 1 April 2000
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 12 (4) , 404-406
- https://doi.org/10.1109/68.839033
Abstract
A new type of polymer waveguide for two-dimensional spot-size transformation is reported, with which coupling efficiency of waveguides with 4- and 8-/spl mu/m core diameters was reduced by /spl ap/1.6 dB. The length needed for spot-size transformation was less than 1 mm along the direction of propagation. In this polymer waveguide, refractive index difference between core and cladding (/spl Delta/n) is properly controlled along the direction of propagation while the core cross section is kept uniform.Keywords
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