Related Experiment Video
Updated: May 3, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.0K
High-power, 420-nm, low-intensity-noise laser source for quantum computing applications
Optics Letters
|May 1, 2026
Summary
Researchers generated high-power, single-frequency visible light using fiber lasers and nonlinear crystals. This method achieved efficient conversion, producing 15.2 W of blue light with low noise for advanced applications.
Area of Science:
- Optics and Photonics
- Nonlinear Optics
- Laser Physics
Background:
- High-power visible light sources are crucial for various scientific applications.
- Efficient frequency conversion techniques are needed to generate visible light from readily available infrared lasers.
Purpose of the Study:
- To demonstrate efficient generation of high-power, single-frequency visible light.
- To characterize the noise properties and beam quality of the generated light.
Main Methods:
- Sum-frequency mixing (SFM) of two high-power infrared fiber laser systems.
- Utilizing an MgO-doped periodically poled lithium niobate (ppLN) crystal for SFM.
- Cavity-enhanced second-harmonic generation (SHG) for frequency doubling.
Main Results:
- Generated 20.2 W of continuous-wave (CW) single-frequency light at 840 nm via SFM with 48% efficiency.
- Achieved 15.2 W of CW light at 420 nm via cavity-enhanced SHG with 79% efficiency.
- Obtained good beam quality (M² < 1.3) and low intensity noise (<0.05% RMS).
Conclusions:
- The demonstrated method provides a scalable and efficient route to high-power visible light generation.
- The generated light exhibits excellent noise characteristics suitable for demanding applications.
- This work advances the capabilities of nonlinear frequency conversion for laser systems.
