30 October 2001 Novel methods of intracavity beam shaping
Author Affiliations +
Abstract
Methods of shaping laser beams within the laser resonator are studied. The simplest form of shaping is the spatial mode generation inherent in the laser cavity due to the geometry of the resonator in conjunction with gain to compensate for roundtrip losses, such as diffraction and output coupling. Typically the fundamental mode or multimode behavior is exhibited from such configurations. Passive mode shaping can be accomplished by introducing static amplitude or phase masks. An example of an amplitude mask is provided in order to generate a higher-order spatial mode. Active mode shaping can be accomplished by altering the optical pump distribution. This case is studied experimentally with a diode-end-pumped Nd:YVO4 laser and compared to modeling of expected Hermite-Gaussian mode generation. Active mode shaping allows the preferred mode distribution to be altered in real time. Additional shaping can be done following the resonator to modify a Hermite-Gaussian mode into a pseudo-Laguerre-Gaussian mode. This work also shows that using the coherent propagation method of Gaussian beam decomposition is capable of modeling and describing intracavity beam shaping.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. John Koshel, R. John Koshel, } "Novel methods of intracavity beam shaping", Proc. SPIE 4443, Laser Beam Shaping II, (30 October 2001); doi: 10.1117/12.446753; https://doi.org/10.1117/12.446753
PROCEEDINGS
11 PAGES


SHARE
RELATED CONTENT

Nd YAG slab laser partially end pumped by diode laser...
Proceedings of SPIE (August 17 1997)
Resonators for high-power lasers
Proceedings of SPIE (December 21 1998)
Simple annular resonators with toric and helical mirrors
Proceedings of SPIE (August 12 1993)
Resonator designs for high-power solid state lasers
Proceedings of SPIE (July 31 1990)
Mode control in annular resonators
Proceedings of SPIE (May 12 1998)
Phase aperture: a new laser component?
Proceedings of SPIE (July 07 2003)

Back to Top