A Silicon Nitride MMI O-Band Power Combiner Based on Slot Waveguide Structures

Dror Malka

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Optical transceivers that function under a high-speed rate condition are demanded to have more optical power ability to overcome the power losses which is a cause of the need of using a larger RF line connected to the Mach-Zehnder modulator for fulfilling the high-speed condition. The classic solution to this problem is to use a better power laser with a high level of 120 milliwatts. However, this solution can be complicated for a photonic chip circuit due to the high cost and nonlinear effects, which can increase the system noise. Therefore, we propose a better solution to increase the power level using a 4x1 power combiner which is based on multimode interference using a silicon nitride slot waveguide structure. Results show that the combiner can function well over the O-band spectrum with high combiner efficiency of at least 98.1% and after a short light coupling propagation of 28.8 μm. This new study shows how it is possible to obtain a transverse electric mode solution for four Gaussian coherent sources using Si3N4 slot waveguides technology. This new technology can be utilized for combining multiple coherent sources that work with a photonic chip at the O-band range.

Original languageEnglish
Title of host publicationIntegrated Optics
Subtitle of host publicationDesign, Devices, Systems and Applications VII
EditorsPavel Cheben, Jiri Ctyroky, Inigo Molina-Fernandez
ISBN (Electronic)9781510662704
StatePublished - 2023
Externally publishedYes
EventIntegrated Optics: Design, Devices, Systems and Applications VII 2023 - Prague, Czech Republic
Duration: 24 Apr 202326 Apr 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceIntegrated Optics: Design, Devices, Systems and Applications VII 2023
Country/TerritoryCzech Republic

Bibliographical note

Publisher Copyright:
© 2023 SPIE.


  • MMI Coupler
  • Optical combiner
  • Silicon nitride
  • Slot-waveguide


Dive into the research topics of 'A Silicon Nitride MMI O-Band Power Combiner Based on Slot Waveguide Structures'. Together they form a unique fingerprint.

Cite this