Set temperature dependence of fractional thermal loading and effective stimulated emission cross section of a diode double end pumped TEM00 Nd:YAG laser for micromachining application
✍ Scribed by S. K. Sudheer; V. P. Mahadevan Pillai; V. U. Nayar
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 157 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1612-2011
No coin nor oath required. For personal study only.
✦ Synopsis
We discuss the set temperature dependence of fractional
thermal loading and effective stimulated emission cross section of
an efficient, diode double end -pumped Nd:YAG laser using two 30 W
pump diodes with a CW output power greater than 8 W in polarized
TEM~00~ mode near-diffraction limited beam suitable for
micromachining applications of ultra hard materials like diamond.
The temperature dependence of effective stimulated emission cross
section for ^4^F~3/2~ → ^4^I~11/2~ transition and
fractional thermal loading of Nd:YAG are determined where the pump
power induced thermal lensing is used to make the cavity stable
and in thermally stabilized solid state lasers the cavity
parameters change dynamically with the pump power and hence the
overlap integrals become a function of absorbed pump power. It is
observed that the fractional thermal loading is increasing with
increase in set temperature of laser crystal and effective
stimulated emission cross section is increasing almost linearly
with the increase in set temperature of laser crystal and pump
laser diodes up to 30°C the rated value of the pump
diodes and thereafter the cross section decreases with increase in
temperature.