Direction reconfigurable non-reciprocal acousto-optic modulator on chip
Abstract
Non-reciprocal components are essential in photonic systems for protecting light sources and for signal routing functions. Acousto-optic methods to produce non-reciprocal devices offer a foundry-compatible alternative to magneto-optic solutions and are especially important for photonic integration. In this paper, we experimentally demonstrate a dynamically reconfigurable non-reciprocal acousto-optic modulator at telecom wavelength. The modulator can be arranged in a multitude of reciprocal and non-reciprocal configurations by means of an external RF input. The dynamic reconfigurability of the device is enabled by a new cross-finger interdigitated piezoelectric transducer that can change the directionality of the reciprocity-breaking acoustic excitation based on the phase of the RF input. The methodology we demonstrate here may enable new avenues for direction dependent signal processing and optical isolation.
Cite
@article{arxiv.1908.02382,
title = {Direction reconfigurable non-reciprocal acousto-optic modulator on chip},
author = {Donggyu B Sohn and Gaurav Bahl},
journal= {arXiv preprint arXiv:1908.02382},
year = {2019}
}