Open AccessEfficient polarization splitter-rotator on thin-film lithium niobate
Author(s) -
Xuanhao Wang,
An Pan,
Tingan Li,
Cheng Zeng,
Jinsong Xia
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.443798
Subject(s) - lithium niobate , optics , materials science , polarization (electrochemistry) , splitter , beam splitter , extinction ratio , polarization division multiplexing , optoelectronics , insertion loss , power dividers and directional couplers , multiplexing , fabrication , thin film , wavelength division multiplexing , physics , telecommunications , computer science , nanotechnology , chemistry , wavelength , medicine , laser , alternative medicine , pathology
Recently, thin-film lithium niobate coherent modulators have emerged as a promising candidate for the next generation coherent communication system. High performance polarization splitter-rotators (PSRs) are essential to further achieve dual polarization coherent modulators. Here we present a PSR on the lithium niobate on insulator (LNOI) platform with the measured insertion loss less than 1 dB, extinction ratio exceeding 26.6 dB and 19.6 dB for TE0 and TM0 modes, working bandwidth of 1520-1580 nm and total length of 440 µm. In addition, a relatively large fabrication tolerance for waveguide width is also proved. This demonstrated PSR can find its potential application in polarization-division multiplexing (PDM) optical transmitter based on LNOI.