Mathematical simulation of heating effects in a static diode-pumped vapor rubidium cell

Diode-pumped alkali lasers (DPALs) have attracted a lot of interests in the recent years because of their high Stokes efficiency, good beam quality, compact size, and near-infrared emission wavelengths. Until now, the thermal features have been only analyzed in an open alkali cell. In this report, we established a mathematical model to examine the heating effect of a static sealed rubidium cell by means of a Finite Difference (FD) procedure. After assuming the absorption coefficient of the alkali vapor, the temperature distributions of a real sealed rubidium vapor cell have been acquired for different powers and beam waists of the pump. The analytic conclusions would be helpful in designing a feasible DPAL.

[1]  V. K. Kanz,et al.  End-pumped continuous-wave alkali vapor lasers: experiment, model, and power scaling , 2004 .

[2]  Xiaojun Xu,et al.  Modeling, numerical approach, and power scaling of alkali vapor lasers in side-pumped configuration with flowing medium , 2011 .

[3]  G. Perram,et al.  A three-level analytic model for alkali metal vapor lasers: part I. Narrowband optical pumping , 2010 .

[4]  Hirofumi Miyajima,et al.  Cesium vapor laser pumped by a volume-Bragg-grating coupled quasi-continuous-wave laser-diode array , 2006 .

[5]  Qi Zhu,et al.  Analysis of temperature distributions in diode-pumped alkali vapor lasers , 2010 .

[6]  V. A. Eroshenko,et al.  Diode-pumped caesium vapour laser with closed-cycle laser-active medium circulation , 2012 .

[7]  Boris V. Zhdanov,et al.  Multiple laser diode array pumped Cs laser with 48W output power , 2008 .

[8]  Heinz P. Weber,et al.  Modeling of thermal lensing and higher order ring-mode oscillation in end-pumped cw Nd:YAG lasers , 1993, Photonics West - Lasers and Applications in Science and Engineering.

[9]  Raymond J. Beach,et al.  DPAL: A new class of lasers for cw power beaming at ideal photovoltaic cell wavelengths , 2004 .

[10]  V Keith Kanz,et al.  Resonance transition 795-nm rubidium laser. , 2003, Optics letters.

[11]  Hirofumi Miyajima,et al.  Approaches of output improvement for a cesium vapor laser pumped by a volume-Bragg-grating coupled laser-diode-array , 2007 .

[12]  William F. Krupke,et al.  Diode pumped alkali lasers (DPALs)—A review (rev1) , 2012 .

[13]  Boris V. Zhdanov,et al.  Review of alkali laser research and development , 2012 .

[14]  Randall J. Knize.  Diode Pumped Alkali Laser for Defense , 2016 .

[15]  Jason Zweiback,et al.  Modeling laser performance of scalable side pumped alkali laser , 2010, LASE.

[16]  Sheldon S Q Wu,et al.  Hydrocarbon-free resonance transition 795-nm rubidium laser , 2008, SPIE LASE.

[17]  Bailiang Pan,et al.  Thermal Effects in High-Power Double Diode-End-Pumped Cs Vapor Lasers , 2012, IEEE Journal of Quantum Electronics.