Back to Search Start Over

Athermal echelle grating and tunable echelle grating demultiplexers using a Mach-Zehnder interferometer launch structure

Authors :
Daniele Melati
Dan-Xia Xu
Ross Cheriton
Shurui Wang
Martin Vachon
Jens H. Schmid
Pavel Cheben
Siegfried Janz
Source :
Optics Express. 30:14202
Publication Year :
2022
Publisher :
Optica Publishing Group, 2022.

Abstract

We present a comparative experimental study of three silicon photonic echelle grating demultiplexers that are integrated with a Mach-Zehnder interferometer (MZI) launch structure. By appropriate choice of the MZI configuration, the temperature induced shift of the demultiplexer channel wavelengths can be suppressed (athermal) or enhanced (super-thermal) or be controlled by an on-chip micro-heater. The latter two configurations allow the channel wavelengths to be actively tuned using lower power than possible by temperature tuning a conventional echelle demultiplexer. In the athermal configuration, the measured channel spectral shift is reduced to less than 10 pm/°C, compared to the 83 pm/°C shift for an unmodified echelle device. In super-thermal operation an enhanced channel temperature tuning rate of 170 pm/°C is achieved. Finally, by modulating the MZI phase with an on-chip heater, the demultiplexer channels can be actively tuned to correct for ambient temperature fluctuations up to 20 °C, using a drive current of less than 20 mA.

Details

ISSN :
10944087
Volume :
30
Database :
OpenAIRE
Journal :
Optics Express
Accession number :
edsair.doi.dedup.....2ec9077ca147bd86f27e697cb1aa937d
Full Text :
https://doi.org/10.1364/oe.453273