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GdVO4晶体的受激拉曼散射
  • 期刊名称:中国激光, 35(1), 11–16, 2008.1.
  • 时间:0
  • 分类:O437.3[机械工程—光学工程;理学—光学;理学—物理]
  • 作者机构:[1]山东大学晶体材料国家重点实验室,山东济南250100
  • 相关基金:国家自然科学基金(60508010,50590401)、山东省自然科学基金(Y2004F05)和山东省泰山学者计划资助项目.
  • 相关项目:几种钨酸、钒酸盐晶体的受激拉曼散射
中文摘要:

采用熔体提拉法生长出了高质量的a轴和c轴GdVO4单晶。测量了GdVO4晶体的室温透过光谱,结果表明GdVO;晶体的短波透过截止边为338nm,长波透过截止边大于3000nm,透过范围覆盖紫外、可见、近红外和部分中红外波段,因此可以在较宽波长范围内实现拉曼激光频移。研究了GdVO4晶体在532nm和355nm皮秒激光脉冲抽运下的受激拉曼散射(SRS)。采用腔外单次通过方式,获得了3级斯托克斯线(557.98nm,586.86nm,618.92nm)和1级反斯托克斯线(508.01nm),得到GdV04晶体一级斯托克斯拉曼散射的稳态增益系数为26.6±0.2cm/GW,二级斯托克斯拉曼散射的稳态增益系数为14.0±0.2cm/GW,受激拉曼散射的整体转换效率达到43%。报道了GdVO4晶体355nm激发的受激拉曼散射,观察到2级斯托克斯谱线(365.9nm,378.1nm),在此条件下测得一级斯托克斯谱线的拉曼增益高达114±9cm/GW。

英文摘要:

By Czochralski method, high quality GdVO4 single crystals were grown out along a-axis and c-axis. The transmission spectrum of GdVO4 crystal was measured at room temperature. The ultra-violet cut-edge is 338 nm and the infrared cut-edge is larger than 3000 nm, so the transmission spectrum of GdVO4 crystal could cover the region from ultra-violet to part of mid- infrared, and it indicats that GdVO4 crystal could be used for Raman frequency shifting in a wide wavelength scope. The stimulated Raman scattering (SRS) excited by 532 nm and 355 nm pico- second pulses was investigated in GdVO4 crystal. With an ultra-cavity single-pass configuration, three Stokes lines (557.98 nm, 586.86 nm, 618.92 nm) and one anti-Stokes lines (508.01 nm) were observed. The steady-state Raman gain coefficient for the first Stokes line was calculated to be 26.6±0.2 cm/GW, the gain coefficient for the second Stokes line was calculated to be 14.0±0.2 cm/GW, and the total Raman conversion efficiency reached to 43%. For GdVOI crystal, the SRS of 355 nm laser was reported. Two Stokes lines (365.9 nm, 378.1 nm) were observed, and in this condition the steady-state Raman gain coefficient for the first Stokes line was measured as high as 114±9 cm/GW.

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