Improvement of thermal effects in a diode-end-pumped, composite Tm:YAG rod with undoped ends.
We present comparative studies of the laser performance of a diode-end-pumped, composite Tm:YAG rod with undoped ends. Efficient heat removal in a composite rod can reduce the peak of the rise in temperature in the 2-mm-long active segment by 19% compared with that in a noncomposite rod by theoretical calculation. The threshold pump power was reduced by 10%, and the focal power of the thermal lens was improved by 15%. These improvements permit high output performance and flexible design of laser cavities in diode-end-pumped Tm:YAG lasers.
Tsunekane
M
M
Optoelectronics and High Frequency Device Research Laboratories, NEC Corporation, 1-1 Miyazaki 4-chome, Miyamae-ku, Kawasaki, Kanagawa 216-8555, Japan. tsune@mri.biglobe.ne.jp
Taguchi
N
N
Inaba
H
H