Control of light transmission in laser-written phase-shifted Bragg grating couplers |
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| Authors: | Ha Sangwoo Ams Martin Marshall Graham D Neshev Dragomir N Sukhorukov Andrey A Kivshar Yuri S Withford Michael J |
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| Institution: | Nonlinear Physics Centre and Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia. |
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| Abstract: | We demonstrate the fabrication by direct laser writing and the operation of a directional coupler containing Bragg gratings in each waveguide. We achieve high-precision control over the longitudinal shift between the gratings, which feature first-order Bragg resonance at telecommunication wavelengths. We observe fundamental differences between light transmission characteristics in couplers with unshifted and shifted gratings in agreement with theoretical predictions. |
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