High-Speed Modeling Of Ultracompact Electrooptic Modulators

Keywords

Electrooptic modulators; Photonic integrated circuits; Thin-film lithium niobate; Transmission line modeling

Abstract

The technology for compact thin-film lithium niobate electrooptic modulators has made significant advances recently. With achieving high levels of maturity for such platforms, a model is now required in order to accurately design the devices and reliably predict their performance limits. In this paper, a general transmission-line model is developed for predicting the frequency-dependent response of the compact modulators. The main radio frequency (RF) parameters of the modulators, such as characteristic impedance, effective index, and attenuation constant are calculated as a function of the coplanar waveguide dimensions, and validated by using numerical simulations. The accuracy of the model in predicting the 3-dB modulation bandwidth of the devices is verified by comparison with experimental results. Finally, guidelines for device design with significant improvement in the attainable modulation bandwidth are also presented by optimization of RF and optical parameters, predicting > 100 GHz modulation bandwidth. The presented model is not limited to emerging thin-film lithium niobate devices, and is applicable to any type of ultracompact electrooptic modulator.

Publication Date

12-15-2018

Publication Title

Journal of Lightwave Technology

Volume

36

Issue

24

Number of Pages

5893-5902

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/JLT.2018.2879830

Socpus ID

85056352096 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85056352096

This document is currently not available here.

Share

COinS