Abstract
We demonstrate beam steering using a passive silica optical phased array (OPA) with wavelength tuning. In this OPA, a constant path difference is built up to assign sequential phase delays with a wavelength variation in arrayed waveguide channels for the beam steering. From as-fabricated 1 × 101 passive silica OPA chips, we successfully achieved beam forming with a transversal divergence angle of 0.57° at a 1548.3-nm wavelength and also beam steering of 15.4° by wavelength tuning of 30.7 nm. Combining a cylindrical lens in front of the end-fire radiators, the longitudinal divergence angle could be reduced from 13.0° to 0.42°. The side-mode suppression ratio of the beam was 10.3 dB at the center position. Through simulation, we analyzed the effects of the phase errors on the beam quality, due to the effective index fluctuation of the waveguide channels, and provided an allowable error range to attain beam forming from the passive OPA.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Binghui Li, Caiming Sun, Hongjie Wang, Zhenmin Chen, Xiaomin Nie, Shupeng Deng, Lesi Yang, and Aidong Zhang
Opt. Lett. 46(19) 4948-4951 (2021)
Mathias Prost, Jon Øyvind Kjellman, Sarvagya Dwivedi, Aleksandrs Marinins, Hemant Kumar Tyagi, Tangla David Kongnyuy, Philippe Soussan, Marcus S. Dahlem, Xavier Rottenberg, and Roelof Jansen
Opt. Lett. 47(23) 6081-6084 (2022)
Wesley D. Sacher, Fu-Der Chen, Homeira Moradi-Chameh, Xinyu Liu, Ilan Felts Almog, Thomas Lordello, Michael Chang, Azadeh Naderian, Trevor M. Fowler, Eran Segev, Tianyuan Xue, Sara Mahallati, Taufik A. Valiante, Laurent C. Moreaux, Joyce K. S. Poon, and Michael L. Roukes
Opt. Lett. 47(5) 1073-1076 (2022)