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Optimizations of Double Titanium Nitride Thermo-Optic Phase-Shifter Heaters Using SOI Technology.

Eylon Eliyahu Krause1, Dror Malka1

  • 1Faculty of Engineering, Holon Institute of Technology (HIT), Holon 5810201, Israel.

Sensors (Basel, Switzerland)
|October 28, 2023
PubMed
Summary

A new double titanium nitride heater for thermo-optic phase shifters (TOPS) significantly reduces electrical power consumption for Mach-Zehnder modulators (MZMs). This optimized design offers a cost-effective solution for optical communication systems.

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Area of Science:

  • Photonics and Optical Engineering
  • Semiconductor Device Physics

Background:

  • Mach-Zehnder modulators (MZMs) face fabrication imbalance issues affecting performance.
  • Existing thermo-optic phase shifters (TOPS) often require high electrical power, increasing system costs.
  • Single-heater TOPS designs are less energy-efficient for MZM applications.

Purpose of the Study:

  • To propose and investigate an optimal double titanium nitride heater model for TOPS.
  • To reduce electrical power consumption and thermal crosstalk in MZM devices.
  • To enhance MZM performance for data centers and long-range optical communications.

Main Methods:

  • Numerical investigations of a novel double titanium nitride heater TOPS design.
  • Analysis of key geometrical parameters, heat distribution, and thermal crosstalk.
Keywords:
MZMSOIphase shiftersilicontitanium nitride

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  • Evaluation at 1550 nm wavelength using silicon-on-insulator technology.

    • Main Results:

    • The optimal TOPS design achieves a π-phase shift with low electrical power (19.1 mW).
    • Low thermal crosstalk (0.404) and minimal optical losses (<1 mm length) were achieved.
    • The device effectively addresses MZM imbalance issues with improved energy efficiency.

    Conclusions:

    • The proposed double titanium nitride heater TOPS offers a low-power, high-performance solution for MZMs.
    • This technology can improve transmitter system efficiency for data centers and optical networks.
    • The optimized design contributes to cost reduction and enhanced functionality in optical communication.