Laser Research Center for Molecular Science, Institute for Molecular Science, 38 Nishigonaka, Myodaiji, Okazaki 444-8585, Japan.
Opt Lett. 2011 Jun 15;36(12):2257-9. doi: 10.1364/OL.36.002257.
Laser action of the photo-thermo-refractive (PTR) glass, which is the photosensitive material for holographic recording of volume Bragg gratings (VBGs), was demonstrated for the first time by introducing Nd³⁺. Nd:PTR glass has a bandwidth of 27.8 nm and 16.0 nm for luminescence and absorption, respectively. An uncoated 2 mm thick Nd:PTR element generated cw laser output of 124 mW, with a slope efficiency of 25%, by laser diode pumping. This Nd:PTR glass also performed wide bandwidth laser action at 1053.9-1063.3 nm, where the decrease of the pump-absorption efficiency was held off below 30%, even under a 3.5 nm shift of pump wavelength from its absorption center.
首次通过引入 Nd³⁺，证明了光热折变（PTR）玻璃的激光作用，该玻璃是用于记录体布拉格光栅（VBG）的全息的光敏材料。Nd：PTR 玻璃的发光和吸收带宽分别为 27.8nm 和 16.0nm。一个未镀膜的 2mm 厚 Nd：PTR 元件通过激光二极管泵浦产生了 124mW 的连续波激光输出，斜率效率为 25%。这种 Nd：PTR 玻璃在 1053.9-1063.3nm 处也具有宽带宽的激光作用，即使在泵浦波长从吸收中心偏移 3.5nm 的情况下，泵浦吸收效率的下降也保持在 30%以下。
