Laser power, cell temperature, and beam quality dependence on cell length of static Cs DPAL Academic Article uri icon

abstract

  • The influence of cell length of a static diode-pumped Cs laser on laser power, gain medium temperature, and laser beam quality is studied theoretically using a 3D time-dependent computational fluid dynamics model where Gaussian spatial shapes of the pump and laser intensities in any cross section of the beams are assumed. Reasonable agreement with power measurements in a static diode-pumped alkali laser (DPAL) with 20 mm cell length [Electron. Lett. 44, 582 (2008) ELLEAK0013-519410.1049/el: 20080728] is obtained. It is shown that the gain medium temperature rise caused by the pump beam absorption can be decreased by increasing the length of the alkali cell and that, for given conditions, there is an optimal cell length corresponding to maximum laser power. At∼ 100 W pump power the optimum cell length of∼ 50− 60 mm is larger than the 20 mm length usually used in …

publication date

  • February 1, 2017

published in