Related Experiment Video
Updated: Jun 22, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Improving the output beam quality of multimode laser resonators
Optics Express
|June 5, 2009
Summary
Researchers developed a new method to enhance multimode laser beam quality. This technique splits the laser beam into smaller, high-quality beams that are then coherently combined, significantly boosting brightness.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Multimode lasers offer high power but suffer from poor beam quality compared to single-mode lasers.
- Improving multimode laser beam quality is crucial for advanced optical applications.
Purpose of the Study:
- To present an efficient approach for enhancing the beam quality of multimode laser resonators.
- To demonstrate a method for coherently combining multiple high-quality beams within a resonator.
Main Methods:
- Splitting the intra-cavity multimode laser beam into an array of smaller beams.
- Utilizing planar interferometric beam combiners for coherent addition of the smaller beams.
- Experimental verification using a pulsed Nd:YAG laser resonator.
Main Results:
- Achieved a significant increase in laser brightness, by one order of magnitude.
- Successfully split a multimode beam into four high-quality Gaussian beams and coherently added them.
- Spectral measurements confirmed the feasibility of scaling to larger coherent arrays.
Conclusions:
- The presented approach offers an efficient way to improve multimode laser beam quality.
- Coherent addition of smaller, high-quality beams is a viable strategy for brightness enhancement.
- The method shows potential for scaling to more complex laser systems.
