A low-loss and compact waveguide Y-branch using refractive-index tapering
- 1 February 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 9 (2), 203-205
- https://doi.org/10.1109/68.553092
Abstract
A new approach to an integrated Y-branch power splitter, useful for strongly guiding waveguide circuits, is proposed, fabricated and tested. The device uses adiabatic mode evolution by effective-refractive-index tapering to achieve a compact, low-loss geometry. Device performance is examined numerically by twoand three-dimensional beam propagation simulations. Y-branches with an overall length of /spl sim/330 /spl mu/m and losses of <0.2 dB are then fabricated in GaAs-AlGaAs. A compact and low-loss 1/spl times/4 power splitter incorporating this Y-branch is also described and demonstrated.Keywords
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