Chromatic focal plane displacement in the parabolic chirped waveguide grating router
- 1 May 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 9 (5), 625-627
- https://doi.org/10.1109/68.588159
Abstract
It is shown that the application of parabolic chirp to the arm lengths of the waveguide grating router is equivalent to placing a lens with chromatic aberration in the free-space region. By adjusting the focal plane for each port, performance equivalent to a nonchirped grating can be achieved in a desired grating order with significant passband suppression in unwanted grating orders.Keywords
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