Related Experiment Video
Updated: Sep 13, 2025
10:17
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
11.7K
Low-threshold single-mode laser operation from a 35-μm-diameter Er:YAG microdisk laser.
Optics Letters
|August 2, 2025
Summary
Researchers developed a compact C-band microcavity laser using Er:YAG crystal. This low-threshold on-chip laser source is ideal for integrated optical chips.
Area of Science:
- Photonics and Laser Technology
- Materials Science for Optoelectronics
Background:
- Integrated optical chips require low-threshold, compact C-band lasers.
- Erbium-doped Yttrium Aluminum Garnet (Er:YAG) is a promising gain medium.
Purpose of the Study:
- To construct a low-threshold C-band microcavity laser using Er:YAG.
- To evaluate Er:YAG single-crystal films as a gain medium for WGM microcavity lasers.
Main Methods:
- Fabricated a 35-μm-diameter microdisk laser from a 1-μm-thick crystalline Er:YAG film.
- Utilized ion-beam-enhanced etching for film fabrication.
- Pumped the Er:YAG microdisk with a 1470-nm laser.
Main Results:
- Achieved C-band laser emission at 1530 nm.
- Obtained a remarkably low threshold of 496 nW.
- Measured a slope efficiency of 3.6%.
Conclusions:
- Er:YAG single-crystal films are excellent gain media for WGM microcavity lasers.
- Demonstrated a new option for compact, low-threshold on-chip laser sources.
