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Frequency response and tunability of grating-assisted directional couplers

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2 Author(s)
G. Griffel ; Dept. of Electr. Eng. & Appl. Phys., California Inst. of Technol., Pasadena, CA, USA ; A. Yariv

The spectral properties of grating-assisted directional couplers are studied using an improved coupled mode formulation. Key parameters for the design of these structures, such as the grating period, the coupling length, and other structural parameters, are calculated. The frequency response, the filter bandwidth, and the tuning range are analyzed. The technique is used to examine a specific case of InGaAsP-InP tunable filters, and the results are compared to a prior experiment

Published in:

IEEE Journal of Quantum Electronics  (Volume:27 ,  Issue: 5 )