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Scalable graphene electro-optical modulators for all-fibre pulsed lasers
Kuen Yao Lau1, Alexander Pyymaki Perros, Diao Li
1Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, 02150 Espoo, Finland. Lau.kuenyao@aalto.fi diao.li@aalto.fi zhipei.sun@aalto.fi.
Nanoscale
|May 26, 2021
Summary
Scalable graphene electro-optical modulators offer a promising alternative for all-fibre pulsed laser systems. This study demonstrates their first-time integration into an actively Q-switched fibre laser, achieving high performance at 2 μm.
Area of Science:
- Photonics and Optoelectronics
- Materials Science
Background:
- Conventional modulators face limitations in broadband operation and energy efficiency.
- Graphene electro-optical modulators offer advantages like ultrafast response and low power consumption.
Purpose of the Study:
- To report scalable graphene electro-optical modulators for all-fibre pulsed laser applications.
- To demonstrate the first actively Q-switched all-fibre laser using a graphene electro-optical modulator.
Main Methods:
- Development of scalable graphene electro-optical modulators.
- Integration of the modulator into an all-fibre actively Q-switched laser system.
- Characterization of laser output parameters including wavelength, repetition rate, pulse energy, and signal-to-noise ratio.
Main Results:
- Demonstration of an actively Q-switched all-fibre laser operating at ~1961.9 nm.
- Achieved tunable repetition rates from 56.5 to 62.5 kHz.
- Obtained maximum pulse energy of ~80 nJ and a signal-to-noise ratio of ~46.6 dB.
Conclusions:
- Scalable all-fibre integrated graphene electro-optical modulators are suitable for high-performance 2 μm pulsed fibre lasers.
- This approach offers easy integration and promising potential for applications in medicine, material processing, and spectroscopy.
