Direction reconfigurable nonreciprocal acousto-optic modulator on chip | Zendy

Donggyu B. Sohn | Zendy; Gaurav Bahl | Zendy

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Direction reconfigurable nonreciprocal acousto-optic modulator on chip

Author(s) -

Donggyu B. Sohn,

Gaurav Bahl

Publication year - 2019

Publication title -

apl photonics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.094

H-Index - 34

ISSN - 2378-0967

DOI - 10.1063/1.5123497

Subject(s) - reconfigurability , photonics , bandwidth (computing) , reciprocity (cultural anthropology) , transducer , electro optic modulator , optical isolator , signal (programming language) , optics , optoelectronics , optical modulator , electronic engineering , phase modulation , computer science , physics , engineering , telecommunications , acoustics , optical fiber , psychology , social psychology , phase noise , programming language

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.

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