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Regenerated distributed Bragg reflector fiber lasers for high-temperature operation
Rongzhang Chen1, Aidong Yan, Mingshan Li
1Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
Optics Letters
|August 14, 2013
Summary
High-temperature fiber lasers using thermally regenerated gratings achieve stable 1 mW output at 750°C. This breakthrough enables fiber laser sensors for extreme environments.
Area of Science:
- Photonics and Laser Technology
- Materials Science for Extreme Environments
Background:
- Fiber lasers are essential for various sensing applications.
- High-temperature operation remains a significant challenge for conventional fiber laser designs.
Purpose of the Study:
- To develop and demonstrate a distributed Bragg reflector (DBR) fiber laser capable of stable operation at extreme temperatures.
- To investigate the performance of thermally regenerated fiber gratings as feedback elements in high-temperature fiber lasers.
Main Methods:
- Construction of an erbium-doped DBR fiber laser utilizing thermally regenerated fiber gratings.
- Testing of laser performance, including output power and power fluctuation, at temperatures up to 750°C.
Main Results:
- The DBR fiber laser demonstrated stable operation at 750°C with an output power of 1 mW.
- Output power fluctuation at 750°C was measured to be 1.06% over a 7-hour period.
- The thermal regeneration process proved effective for creating robust feedback elements.
Conclusions:
- Thermally regenerated fiber gratings enable high-temperature operation of DBR fiber lasers.
- The developed fiber laser technology is suitable for sensor applications in extreme environments.
- This fabrication process offers new avenues for designing robust fiber optic sensors.
