Tunable Silicon Photonic RF Phase Shifter With Low RF Power Variation Based on Constructive Interference of an Add-Drop Ring Resonator

Tunable Silicon Photonic RF Phase Shifter With Low RF Power Variation Based on Constructive Interference of an Add-Drop Ring Resonator

We propose and experimentally demonstrate a tunable silicon photonic radio frequency (RF) phase shifter with low power variation based on constructive interference of an add-drop ring resonator. The thermal nonlinear effect of the add-drop ring resonator is used to realize a nearly 2<italic>&a...

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Bibliographic Details
Main Authors: Yanping Yu, Qihang Shang, Shaohua An, Yong Zhang, Yikai Su, Jianping Yao
Format: Article
Language:English
Published: IEEE 2018-01-01
Series:IEEE Photonics Journal
Subjects:
Add-drop ring resonator
constructive interference
RF power variation
silicon photonic RF phase shifter
Online Access:https://ieeexplore.ieee.org/document/8558522/
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Summary:We propose and experimentally demonstrate a tunable silicon photonic radio frequency (RF) phase shifter with low power variation based on constructive interference of an add-drop ring resonator. The thermal nonlinear effect of the add-drop ring resonator is used to realize a nearly 2<italic>&#x03C0;</italic>-phase shift, and the RF power variation is minimized by allowing two lights at the outputs of the add-drop ring resonator to combine at a directional coupler to achieve constructive interference. By thermally tuning the add-drop ring resonator, a nearly 2<italic>&#x03C0;</italic>-phase shift is realized and the operation is verified by an experiment. Experimental results show that a 0&#x2013;5.2-rad phase-shift range with an RF power variation within 0.2&#x00A0;dB for a frequency range of a 40-GHz signal is achieved by thermally tuning the ring resonator. A phase shift up to 4.1 rad over a frequency range of 20&#x2013;40&#x00A0;GHz is also realized.
ISSN:1943-0655

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