Frequency-selective beam coupler for integrated optics
- 1 January 1974
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 24 (1) , 21-24
- https://doi.org/10.1063/1.1654993
Abstract
A second tunnel layer and an interference layer are added to a prism‐film coupler. The resulting frequency response of the leak rate is given by the Airy formula for an interference filter. Strong coupling exists in the passband, whereas for stopband frequencies the guide and prism are decoupled. Experimentally, a bandwidth of 300 cm−1 in the visible is demonstrated. The underlying principle is also applicable to periodic couplers.Keywords
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