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10-watt diode-pumped red Pr:ZBLAN double-clad fiber laser
Optics Express
|August 13, 2025
Summary
Researchers developed a 10-watt red fiber laser using praseodymium fluoride. This milestone in visible lasers achieves high output power for advanced applications.
Area of Science:
- Laser Physics
- Materials Science
- Photonics
Background:
- Visible fiber lasers are crucial for various applications.
- Developing high-power visible lasers, especially in the red spectrum, remains challenging.
- Fluoride fiber lasers offer potential for efficient visible light generation.
Purpose of the Study:
- To demonstrate a high-power continuous-wave (CW) praseodymium fluoride fiber laser.
- To investigate the performance characteristics and power scaling limits of red fluoride fiber lasers.
- To explore the underlying mechanisms of spectrum broadening in such lasers.
Main Methods:
- Utilized a double-clad 0.8 mol% PrF3-doped ZBLAN fiber as the gain medium.
- Employed a high-power fiber-coupled 442-nm GaN laser diode module as the pump source.
- Analyzed laser output power, slope efficiency, threshold, and spectral properties.
Main Results:
- Achieved 9.1 W CW output power at 635 nm with 27.0% slope efficiency.
- Reached 10.32 W output power in the quasi-continuous-wave regime.
- Observed spectrum broadening attributed to four-wave mixing, following the square root law.
Conclusions:
- This work sets a new benchmark for visible fluoride fiber lasers.
- The developed laser demonstrates significant potential for power scaling in the red spectral range.
- Further research into temperature-dependent spectroscopy and power limits is recommended for future advancements.
