Back to Search
Start Over
Athermal echelle grating and tunable echelle grating demultiplexers using a Mach-Zehnder interferometer launch structure
- 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.
- Subjects :
- Atomic and Molecular Physics, and Optics
Subjects
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