کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1497503 | 993017 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Thermally-induced-birefringence effects of highly Nd3+-doped Y3Al5O12 ceramic lasers Thermally-induced-birefringence effects of highly Nd3+-doped Y3Al5O12 ceramic lasers](/preview/png/1497503.png)
Thermally-induced-birefringence effects of Nd:YAG ceramic lasers are accurately measured. Depolarization for the ceramics is found to be nearly the same with that for (1 1 1)-cut single crystals if Nd3+ concentration is the same. Under non-lasing condition, the thermally-induced birefringence becomes larger as Nd3+ concentration increases due to severer quenching. Under lasing, however, depolarization is measured to be one-third of that under non-lasing because the stimulated emission reduces the nonradiative process, which decreases the thermal load. Moreover, direct pumping into the emitting level by use of a 885 nm pump source intrinsically reduces the heat generation compared with the conventional 808 nm pumping; we have experimentally verified that the depolarization and the thermal load are reduced by 30% by the direct pumping.
Journal: Optical Materials - Volume 29, Issue 10, June 2007, Pages 1271–1276