Related Experiment Video
Updated: Nov 12, 2025
11:24
Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
10.8K
Graphene-coated double D-type low loss optical fiber modulator
Optics Express
|March 17, 2021
Summary
A novel graphene-coated dual-D all-fiber modulator minimizes device loss and enhances modulation efficiency. This advanced fiber modulator offers low loss and high performance for future fiber communications.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
Background:
- All-fiber modulators are crucial components in optical communication systems.
- Minimizing insertion loss and maximizing modulation efficiency are key challenges in modulator design.
Purpose of the Study:
- To propose and analyze a graphene-coated double D-type all-fiber modulator.
- To reduce device loss and improve modulation efficiency compared to standard fiber modulators.
Main Methods:
- Modification of standard fiber by processing the cladding without altering the core structure.
- Utilizing a double graphene layer coating for enhanced electro-optic properties.
- Simulating and calculating mode loss and mode field mismatch loss for X and Y polarizations.
Main Results:
- Achieved low mode loss: 0.125 dB/mm (X-pol) and 0.033 dB/mm (Y-pol).
- Minimized mode field mismatch loss: 0.25% (X-pol) and 0.32% (Y-pol).
- Demonstrated high modulation depth (78.4%) at 5 V with five-layer graphene, and a modulation speed of 15.38 GHz.
Conclusions:
- The proposed dual-D modulator significantly reduces device loss by preserving the core structure.
- Excellent modulation efficiency and speed are achieved with the graphene coating.
- The modulator's low voltage, high efficiency, and good fiber coupling make it suitable for fiber communications and all-fiber systems.
