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Updated: Jun 5, 2025

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All-optical nonvolatile optical modulator for in-fiber operation.

Zhihai Liu1, Xiang Li1, Siying Cheng1

  • 1Key Lab of In-Fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin, 150001, P.R. China.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
Summary
This summary is machine-generated.

We developed a nonvolatile, all-optical modulator using phase-change materials for in-fiber data processing. This device enables energy-efficient, high-speed optical communication without photoelectric conversion.

Keywords:
all-optical modulationintegrated opticsoptical fiberphase-change materials

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Area of Science:

  • Photonics
  • Materials Science
  • Optical Communications

Background:

  • The information age demands high-speed, low-energy photonic systems for data transmission, processing, and storage.
  • Transitioning from electro-optic to all-optical modulators is key, but volatile materials in current devices increase energy consumption.
  • Nonvolatile materials are needed for energy-efficient all-optical modulation.

Purpose of the Study:

  • To propose and demonstrate a novel all-optical, nonvolatile optical modulator for in-fiber operation.
  • To leverage the phase-change properties of Ge2Sb2Te5 (GST) for optical modulation.
  • To enable signal transmission, processing, and storage within optical fibers without photoelectric conversion.

Main Methods:

  • Utilized a Ge2Sb2Te5 (GST) integrated all-optical modulator for in-fiber operation.
  • Induced GST phase transitions with optical pulses to alter fiber end-face reflectivity.
  • Achieved modulation of output light intensity through interference spectra analysis.

Main Results:

  • Demonstrated a 13-dB interference intensity contrast in telecommunications bands.
  • Achieved a response time of approximately 100 nanoseconds (ns) to pump pulses.
  • Successfully operated the device as a scalar multiplication and logic operation unit.

Conclusions:

  • The developed GST-based modulator offers nonvolatile, energy-efficient optical modulation for in-fiber applications.
  • The device exhibits low switching power consumption (<100 nJ) and nonvolatile data retention.
  • This in-fiber modulator is a foundational step towards advanced all-optical devices and networks.