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Unidirectional single-frequency operation of a continuous-wave Alexandrite ring laser with wavelength tunability
Optics Express
|January 18, 2019
Summary
Researchers developed a compact, tunable Alexandrite ring laser for precision applications. This diode-pumped laser achieves continuous-wave, single-frequency operation with over 1 W output power.
Area of Science:
- Laser physics
- Quantum optics
- Materials science
Background:
- Precision laser sources are crucial for spectroscopy, metrology, and quantum technologies.
- Alexandrite lasers offer broad tuning and efficient diode pumping but require further development for precision applications.
Purpose of the Study:
- To achieve continuous-wave (CW) and single-frequency operation of a diode-end-pumped Alexandrite ring laser.
- To demonstrate wavelength tunability and high-quality output for precision light source applications.
Main Methods:
- Development of an ultra-compact, astigmatically compensated bow-tie ring cavity with a novel 'displaced mode' design.
- Utilizing a unidirectional diode-end-pumped configuration.
- Employing a birefringent filter plate for wavelength tuning.
Main Results:
- Achieved CW output power exceeding 1 W in excellent TEM00 mode (M2 < 1.2) using a low brightness pump (M2 ≥ 30).
- Demonstrated wavelength tuning across the 727 - 792 nm range.
- Successfully operated the laser in a single-frequency, continuous-wave regime.
Conclusions:
- This work presents the first CW, single-frequency operation of a diode-end-pumped Alexandrite ring laser.
- The developed laser architecture is compact, efficient, and tunable, paving the way for advanced precision light source applications.
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