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Silicon Photonic Optical Phased Array with Integrated Phase Monitors

Shun TAKAHASHI, Taichiro FUKUI, Ryota TANOMURA, Kento KOMATSU, Yoshitaka TAGUCHI, Yasuyuki OZEKI, Yoshiaki NAKANO, Takuo TANEMURA

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Summary :

The optical phased array (OPA) is an emerging non-mechanical device that enables high-speed beam steering by emitting precisely phase-controlled lightwaves from numerous optical antennas. In practice, however, it is challenging to drive all phase shifters on an OPA in a deterministic manner due to the inevitable fabrication-induced phase errors and crosstalk between the phase shifters. In this work, we fabricate a 16-element silicon photonic non-redundant OPA chip with integrated phase monitors and experimentally demonstrate accurate monitoring of the relative phases of light from each optical antenna. Under the beam steering condition, the optical phase retrieved from the on-chip phase monitors varies linearly with the steering angle, as theoretically expected.

Publication
IEICE TRANSACTIONS on Electronics Vol.E106-C No.11 pp.748-756
Publication Date
2023/11/01
Publicized
2023/05/25
Online ISSN
1745-1353
DOI
10.1587/transele.2022OCP0003
Type of Manuscript
Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category

Authors

Shun TAKAHASHI
  The University of Tokyo
Taichiro FUKUI
  The University of Tokyo
Ryota TANOMURA
  The University of Tokyo
Kento KOMATSU
  The University of Tokyo
Yoshitaka TAGUCHI
  The University of Tokyo
Yasuyuki OZEKI
  The University of Tokyo
Yoshiaki NAKANO
  The University of Tokyo
Takuo TANEMURA
  The University of Tokyo

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