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Efficient single-frequency 972 nm Yb-doped fiber amplifier with core pumping and elevated temperature
Optics Express
|May 9, 2023
Summary
This study demonstrates a high-efficiency Ytterbium-doped fiber (YDF) amplifier producing 6.9 W at 972 nm. The amplifier was also used to generate a 486 nm blue laser, showcasing its versatility.
Area of Science:
- Fiber Laser Technology
- Nonlinear Optics
Background:
- Yb-doped fibers (YDF) are crucial for high-power laser generation.
- Suppressing amplified spontaneous emission (ASE) is key to improving laser efficiency.
Purpose of the Study:
- To develop a monolithic, single-frequency, single-mode, polarization-maintaining YDF amplifier.
- To achieve high efficiency at 972 nm and utilize it for blue light generation.
Main Methods:
- Utilized core pumping at 915 nm and elevated temperatures (300 °C) to mitigate unwanted ASE.
- Employed single-pass frequency doubling to generate blue laser output.
Main Results:
- Achieved a maximum output power of 6.9 W at 972 nm with 53.6% efficiency.
- Successfully generated a single-frequency 486 nm blue laser with 590 mW output power.
Conclusions:
- The developed YDF amplifier effectively suppresses ASE and achieves high efficiency.
- The amplifier serves as a robust platform for generating visible laser wavelengths via nonlinear frequency conversion.
