稀土掺杂氟磷酸盐玻璃是可以满足波分复用系统及超短脉冲系统对带宽和平坦增益要求的激光材料之一。研究了其中一种增益带宽宽,发光谱线平坦的镱铒共掺氟磷酸盐玻璃,其计算半峰全宽为51 nm。对反映宽带性能的有效增益截面的研究表明,该镱铒共掺氟磷酸盐玻璃在1530～1580 nm之间有一平坦的有效增益截面谱线,证明其宽带特性明显优于掺铒磷酸盐玻璃。对Yb3+离子敏化效率的研究显示,在镱铒比为10∶1时,Er3+离子的吸收截面和发射截面达最大值,分别为0.6601 pm2和0.7325 pm2,表明此比值下Yb3+对Er3+的能量传递效率最高。实验结果显示Yb∶Er氟磷酸盐玻璃可用作带宽宽,增益平坦,可实现高能输出的激光器和光纤放大器的基质玻璃材料。

Rare-earth doped fluorophosphate glass is one of the laser materials that can meet the requirements of wavelength-division-multiplexing (WDM) system and ultra-short pulse system for bandwidth and flat gain. A wide-band, flat gain Yb3+∶Er3+-codoped fluorophosphate glass is investigated, and the calculated full width at half maximum (FWHM) is 51 nm. The study on effective gain cross section shows that there is a flat gain shape between 1530～1580 nm, which proves that the wide-band property of the glass is much better than that of phosphate glasses. The sensitization efficiency of Yb3+ on Er3+ shows that when Yb∶Er ratio is 10∶1, the absorption and emission cross sections of Er3+ reach the maximum of 0.6601 pm2 and 0.7325 pm2 respectively, indicating that in this ratio, energy transfer efficiency reaches the best. Results shows that Yb3+∶Er3+ codoped fluorophosphate glass can be a promising candidate as the media glasses for wide-band, flat gain, high output power lasers and laser amplifiers.