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Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Bit-sliced, ultra-compact slow-light Mach-Zehnder modulator for low-power operation at 6-bit resolution
Optics Letters
|July 31, 2026
Summary
This study introduces a compact Mach-Zehnder modulator (MZM) for efficient photonic computing. It uses slow-light effects to achieve high resolution and reduce power consumption in machine learning accelerators.
Area of Science:
- Photonics
- Optical Computing
- Integrated Optics
Background:
- Photonic computing systems require power-efficient modulators.
- High-resolution digital-to-analog converters (DACs) face exponential power scaling.
- Silicon photonics offers potential for dense, high-throughput accelerators.
Purpose of the Study:
- To present a compact, slow-light-enhanced segmented Mach-Zehnder modulator (MZM).
- To design a power-efficient electro-optic digital-to-analog converter (eoDAC) for photonic systems.
- To enable scalable, high-precision solutions for machine learning applications.
Main Methods:
- Utilizing an apodized Bragg grating to induce slow-light effects.
- Implementing a segmented MZM architecture with cascaded 3-bit segments for 6-bit resolution.
- Shifting bit weighting into the optical domain via segment length ratio.
Main Results:
- Achieved a total phase-shifter length of 200 µm.
- Demonstrated a normalized mean square error (NMSE) <10-2 at 1 GHz clock rates.
- Reduced power consumption by approximately 15% compared to electronic DACs.
Conclusions:
- The proposed MZM architecture offers a scalable, high-precision solution.
- This technology is suitable for dense, high-throughput silicon photonic accelerators.
- The slow-light enhancement enables power-efficient photonic computing systems.
