The generation of high-order Laguerre - Gaussian (LG) laser modes at 780 nm from a simple external-cavity diode laser is demonstrated. The beams are derived from computer-generated holograms and a high conversion efficiency of 40% is achieved for LG beams with mode indices from l = 1 to 1 = 6. The line width of the external cavity diode laser is below 1 MHz. This system is suitable for studies of trapped and cooled atoms using LG beams.
Bibliographical noteFunding Information:
We would like to thank Dr. Danny Segal for useful discussions about diode lasers. This work is supported by the UK Engineering and Physical Sciences Research Council under grant number GR/L54301. Kishan Dholakia is a Royal Society of Edinburgh Research Fellow.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering