1.
Opt Lett
; 47(7): 1818-1821, 2022 Apr 01.
Article
in English
| MEDLINE
| ID: mdl-35363743
ABSTRACT
A compact polarization-insensitive electro-optic (EO) modulator, which allows the laser and modulator to be located at different locations while using a standard single-mode fiber to interconnect them, is highly desirable for 5G or future 6G wireless networks. Herein, we propose a modulator based on substrate-removed thin-film lithium niobate. The proposed device exhibits a polarization-dependent loss of 0.35â dB and on-chip loss of approximately 2â dB. The polarization insensitivity of the proposed device was experimentally demonstrated using a four-level pulse-amplitude modulation format at 50 Gbaud (100 Gb/ s).