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High-efficiency, single-frequency, polarized thulium-doped silica fiber lasers
Optics Letters
|August 2, 2024
Summary
High-concentration thulium-doped fiber lasers offer efficient, high-power operation. These lasers demonstrate low noise, enabling advanced applications in the near-infrared spectrum.
Area of Science:
- Laser Physics
- Optical Engineering
- Materials Science
Background:
- Thulium-doped silica fiber lasers are crucial for generating light in the 2-micrometer wavelength range.
- Achieving high power and efficiency while maintaining low noise is a key challenge in fiber laser development.
Purpose of the Study:
- To develop and characterize single-frequency, linearly polarized thulium-doped fiber lasers.
- To investigate the performance of high-concentration thulium-doped silica fiber-distributed Bragg reflector lasers.
- To demonstrate high efficiency, high power, and low noise characteristics.
Main Methods:
- Utilized high-concentration thulium-doped silica fiber.
- Employed a fiber-distributed Bragg reflector (DBR) laser design.
- Used a low-noise pump diode to minimize noise.
Main Results:
- Achieved single-frequency, linearly polarized laser operation.
- Observed output wavelengths spanning from 1908 to 2050 nm.
- Reached high optical efficiencies up to 48% and output powers up to 1 W.
- Demonstrated low relative intensity noise and frequency noise.
Conclusions:
- High-concentration thulium-doped fiber lasers can achieve high efficiency and power.
- The DBR laser architecture combined with low-noise pumping enables excellent noise performance.
- These lasers are suitable for applications requiring stable, high-power emission in the 2-micrometer range.
