A monolithic microcavity laser with simultaneous upconversion and frequency-doubled lasing via crystal-in-glass engineering

Shengda Ye; Jianhao Chen; Jiayue He; Weiwei Chen; Xiongjian Huang; Xiaofeng Liu; Jianrong Qiu; Zhongmin Yang; Guoping Dong

doi:10.1038/s41377-025-02162-9

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A monolithic microcavity laser with simultaneous upconversion and frequency-doubled lasing via crystal-in-glass engineering

Original Articles

- A monolithic microcavity laser with simultaneous upconversion and frequency-doubled lasing via crystal-in-glass engineering
- A monolithic microcavity laser with simultaneous upconversion and frequency-doubled lasing via crystal-in-glass engineering
- Light: Science & Applications 2026年15卷第3期页码：973-983
- Affiliations：
  
  1.State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
  2.School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou, China
  3.School of Physics and Optoelectronics, South China University of Technology, Guangzhou, China
  4.School of Materials Science and Engineering, Zhejiang University, Hangzhou, China
  5.State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China
- Author bio：
  
  Guoping Dong (dgp@scut.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-02162-9
  中图分类号：
- 收稿：2025-10-21，
  
  修回：2025-11-30，
  
  录用：2025-12-07，
  
  网络首发：2026-01-26，
  
  纸质出版：2026-03-31
- Accepted：
Scan QR Code
Shengda Ye, Jianhao Chen, Jiayue He, 等. A monolithic microcavity laser with simultaneous upconversion and frequency-doubled lasing via crystal-in-glass engineering[J]. Light: Science & Applications, 2026,15(3):973-983.

Ye, S. D. et al. A monolithic microcavity laser with simultaneous upconversion and frequency-doubled lasing via crystal-in-glass engineering. Light: Science & Applications, 15, 973-983 (2026).
Shengda Ye, Jianhao Chen, Jiayue He, 等. A monolithic microcavity laser with simultaneous upconversion and frequency-doubled lasing via crystal-in-glass engineering[J]. Light: Science & Applications, 2026,15(3):973-983. DOI： 10.1038/s41377-025-02162-9.

Ye, S. D. et al. A monolithic microcavity laser with simultaneous upconversion and frequency-doubled lasing via crystal-in-glass engineering. Light: Science & Applications, 15, 973-983 (2026). DOI： 10.1038/s41377-025-02162-9.

摘要

Abstract

This work demonstrates a novel crystal-in-glass composite structure for multifunctional micro-nano light sources in integrated photonics. Based on a Er

/Yb

-codoped glass-ceramic (GC) whispering gallery mode (WGM) microcavity incorporating Ba

TiGe

(BTG) crystals

this microcavity enables dual-mode responses combining upconversion (UC) and frequency-doubled lasing. Made from a low-phonon-energy germanate glass matrix codoped with Er

/Yb

for UC gain

the microcavity is crystallized to form BTG microcrystals for second harmonic generation (SHG). By leveraging the high-quality factor (Q ≈ 5.7 × 10

) and small mode volume

we achieve green (550 nm) and red (660 nm) UC lasing in a 30-μm-diameter microcavity with low thresholds of 13.31 μW and 12.97 μW

respectively. Benefitted from the random quasi-phase-matching (RQPM) mechanism in BTG GC

the microcavity also demonstrates an ultrabroadband frequency-doubling response from 900 to 1200 nm. By combining tapered fiber near-field coupling and femtosecond free-space pumping

we achieve simultaneous output of green/red UC lasing and frequency-doubled lasing within a single microcavity. We believe this work offers insights into hybrid material design and cooperative optical field manipulation for tunable lasers and on-chip nonlinear photonic systems.

关键词

Keywords

references

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