Thermally induced birefringence in Nd:YAG slab lasers

Maximum Temperature and Stresses for Two Infinitely Long, Optimum Cut Angle, Uniformly Pumped and Face-Cooled Slabs ^a

^a  The slabs have heights of 4.3 and 43 mm. The width is w = 3 mm and the pump density is 672 MW∕m³. σ _xz = 0 and σ _yz = 0 as expected.

Maximum Stress Levels for Slabs with Different Pump and Cooling Heights, for slab h = 4.3 mm and w = 3.0 mm ^a

^a  The model assumes an incident pump power of 500 W, with 354 W being absorbed in the single pass resulting in 85 W of heating (due to the quantum defect of Nd:YAG). w _cool denotes the height of the water channel, and w _pump is the diameter of the Gaussian pump profile in the vertical (x) direction [see Fig. 4(b)]. T denotes the integrated transmission of a top-hat beam with diameter w _pump passing through the zigzag slab located between parallel polarizers.

Maximum Stresses for Slabs ( h = 4.3 mm and h = 8.6 mm) with Different Pump and Cooling Geometries Using Top-Hat (uw) and Gaussian (gw) Pump Profiles ^a

^a  The model assumes an incident pump power of 500 W, with 354 W being absorbed in the single pass resulting in 85 W of heating (due to the quantum defect of Nd:YAG). h the height of the crystal, w _cool denotes the height of the water channel, and w _pump is the diameter of the pump profile in the vertical (x) direction [see Fig. 4(b)]. T denotes the integrated transmission of a polarized top-hat beam with diameter w _pump passing through the zigzag slab located between parallel polarizers.

Dimensions of the Side-Pumped, Side-Cooled Zigzag CPFS Slab Used in the Experiment

Table 1

Maximum Temperature and Stresses for Two Infinitely Long, Optimum Cut Angle, Uniformly Pumped and Face-Cooled Slabs ^a

^a  The slabs have heights of 4.3 and 43 mm. The width is w = 3 mm and the pump density is 672 MW∕m³. σ _xz = 0 and σ _yz = 0 as expected.

Table 2

Maximum Stress Levels for Slabs with Different Pump and Cooling Heights, for slab h = 4.3 mm and w = 3.0 mm ^a

^a  The model assumes an incident pump power of 500 W, with 354 W being absorbed in the single pass resulting in 85 W of heating (due to the quantum defect of Nd:YAG). w _cool denotes the height of the water channel, and w _pump is the diameter of the Gaussian pump profile in the vertical (x) direction [see Fig. 4(b)]. T denotes the integrated transmission of a top-hat beam with diameter w _pump passing through the zigzag slab located between parallel polarizers.

Table 3

Maximum Stresses for Slabs ( h = 4.3 mm and h = 8.6 mm) with Different Pump and Cooling Geometries Using Top-Hat (uw) and Gaussian (gw) Pump Profiles ^a

^a  The model assumes an incident pump power of 500 W, with 354 W being absorbed in the single pass resulting in 85 W of heating (due to the quantum defect of Nd:YAG). h the height of the crystal, w _cool denotes the height of the water channel, and w _pump is the diameter of the pump profile in the vertical (x) direction [see Fig. 4(b)]. T denotes the integrated transmission of a polarized top-hat beam with diameter w _pump passing through the zigzag slab located between parallel polarizers.

Table 4

Dimensions of the Side-Pumped, Side-Cooled Zigzag CPFS Slab Used in the Experiment