Solid state laser system
A method of bonding an RE:XAB gain medium to a heat spreader includes using a bonding solution of sodium silicate with concentration of sodium silicate is Na2O at 21.2% and SiO2 at 53% with PH>=11 mixed with nano-pure water in a 1:1 ration. Applying the bonding solution onto either a surface of the RE:XAB or a surface of the heat spreader, aligning the RE:XAB and the heat spreader, applying pressure to draw the surfaces of the RE:XAB gain medium and the heat spreader together thereby uniformly spreading the bonding solution; and then curing the bonding solution.
1. A method of bonding a heat spreader to a laser gain medium comprising:
providing a RE:XAB gain medium within a resonator cavity, where X is selected from Y, Ca, Lu, Yb, Nd, Sm, Eu, Gd, Ga, Tb, Dy, Ho, Er, and where RE is selected from Lu, Y, Yb, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Pr, Tm, Cr, Ho, providing a heat spreader, and providing a bonding solution;
applying a volume of the bonding solution onto either a surface of the RE:XAB or a surface of the heat spreader, aligning the RE:XAB and the heat spreader, applying pressure to draw the surfaces of the RE:XAB gain medium and the heat spreader together thereby uniformly spreading the bonding solution; and
curing the bonding solution.
2. The method of claim 1 , wherein the bonding solution is a mixture of nano-pure water and sodium silicate [(NaOH)x(Na2SiO3)y.SiO2].
3. The method of claim 2 wherein the concentration of sodium silicate is Na2O at 21.2% and SiO2 at 53% with PH>=11.
4. The method of claim 2 wherein the volumetric ratio of nano-pure water and sodium silicate is 1:1.
5. The method of claim 1 , further including cleaning the surface of the RE:XAB gain medium and the surface of the heat spreader with a cerium oxide paste and nano-pure water.
6. The method of claim 5 , further including immersing the surfaces of the RE:XAB gain medium and the surface of the heat spreader in sodium bicarbonate solution, or cleaning the same with an optical grade tissue immersed in sodium bicarbonate paste, then rinsing with nano-pure water.
7. The method of claim 1 , wherein the bonding solution is sonicated prior to use.
8. The method of claim 6 , wherein the bonding solution is used within 5 minutes of sonication.
9. The method of claim 6 , wherein the sonication at 40 kHz, at 70 W.
10. The method of claim 6 , wherein the bonding solution is sonicated for at least 5 minutes.
11. The method of claim 1 , wherein curing the bonding solution includes ambient temperature cure.
12. The method of claim 1 , wherein the RE:XAB gain medium is Er,Yb:YAB.
13. The method of claim 1 , wherein the heat spreader is sapphire.
14. The method of claim 1 , wherein the heat spreader is selected from YAB, diamond, synthetic diamond, or ceramic materials.
15. The method of claim 1 , wherein the surface of the heat spreader and the surface of the RE:XAB gain medium are flat.
16. The method of claim 1 , wherein the surface irregularity of the surface of the RE:XAB is less than or equal to λ/10 peak-to-valley.