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Updated: Jul 4, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

A semi-weakly confined erbium-doped waveguide amplifier with double-layered buffer/cladding.

Hengsheng Tang¹, Yigang Li, Yanwu Zhang

¹The State Key Lab for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, School of Information Science and Engineering, Fudan University, Shanghai 200433, China.

|June 26, 2008

Summary

Researchers developed a novel waveguide structure for erbium-doped waveguide amplifiers (EDWAs). This design achieves efficient light confinement and a near-circular optical field, enabling low coupling loss and significant internal gain.

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Last Updated: Jul 4, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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Published on: July 12, 2017

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Area of Science:

Photonics
Materials Science
Optical Engineering

Background:

Waveguide structures are crucial for optical amplifiers.
Efficient mode field matching to single-mode fibers is essential for low loss.
Erbium-doped waveguide amplifiers (EDWAs) are key components in optical communication.

Purpose of the Study:

To design and fabricate a novel semi-weakly confined waveguide structure.
To develop an erbium-doped waveguide amplifier (EDWA) utilizing this new structure.
To evaluate the optical performance, including coupling loss and internal gain.

Main Methods:

Designed and fabricated a waveguide with a 350 nm thin core.
Achieved weak vertical and strong lateral optical confinement.
Fabricated the EDWA using a sol-gel method with a passive core and double-layered buffer/cladding.

Main Results:

The waveguide supports a nearly circular optical field distribution.
Near-circular field matches well with single-mode fiber.
Achieved a low coupling loss of 0.4 dB/facet.
Obtained an internal gain of 1.9 dB near 1550 nm via evanescent wave amplification.

Conclusions:

The novel semi-weakly confined waveguide structure enables efficient light confinement and mode matching.
The fabricated EDWA demonstrates promising performance for optical amplification applications.
The sol-gel fabrication method is suitable for creating these advanced waveguide devices.