光参量振荡器和光参量放大器实现窄谱宽中红外激光输出
发布时间：2019-04-08 09:47
【摘要】：高增益和抽运光谱宽等因素会使光参量振荡器输出的参量光谱线大幅展宽。通常在腔内插入标准具、光栅等元件以控制谱宽,但会引入损耗,导致激光器输出阈值增大,转换效率和输出功率降低。报道了一种不使用任何谱宽压缩元件获得窄谱宽高功率中红外激光输出的方案。该方案将窄谱宽和高功率分离,分别获取。搭建了1.064μmNd…YAG主振荡功率放大结构的窄谱宽抽运源。通过调节光参量振荡器中PPMgLN晶体内的抽运光功率和光斑直径,实现晶体内增益强度的控制,从而有效控制中红外激光谱宽。在光参量振荡器中,当抽运光功率约为3倍阈值时,获得了0.7 W、谱宽小于1.12nm的2.9μm种子光,再通过两级光参量放大器后,最终获得6.27W、光光转换效率15.7%的2.9μm激光输出,谱宽基本保持不变。
[Abstract]:High gain and pump spectrum width will cause the output parametric spectrum of optical parametric oscillator to widen greatly. The standard device, grating and other elements are usually inserted into the cavity to control the spectral width, but the loss is introduced, which leads to the increase of the laser output threshold and the decrease of the conversion efficiency and output power. A scheme for obtaining a narrow spectral width and high power mid-infrared laser without any spectral-width compression element is reported in this paper. In this scheme, narrow spectrum width and high power are separated and obtained respectively. A 1.064 渭 m ND. Narrow spectral width pumping source of YAG main oscillation power amplifier. The gain intensity of the PPMgLN crystal is controlled by adjusting the pump power and the diameter of the spot in the optical parametric oscillator, so as to effectively control the width of the infrared excitation spectrum in the crystal. In the optical parametric oscillator (OPO), when the pump power is about 3 times the threshold, 0.7W is obtained, and the spectral width is less than 2.9 渭 m of the 1.12nm. After passing through the two-stage optical parametric amplifier, 6.27W is obtained. The spectral width of 2.9 渭 m laser with 15.7% optical conversion efficiency is basically unchanged.
【作者单位】： 浙江大学现代光学仪器国家重点实验室;
【基金】：国家自然科学基金(61575172) 浙江省自然科学基金(LZ15F050001) 中国工程物理研究院高能激光科学与技术重点实验室开放基金(2014HEL04) 中央高校基本科研业务费专项资金
【分类号】：TN753.91;TN722.31;TN24
本文编号：2454482
[Abstract]:High gain and pump spectrum width will cause the output parametric spectrum of optical parametric oscillator to widen greatly. The standard device, grating and other elements are usually inserted into the cavity to control the spectral width, but the loss is introduced, which leads to the increase of the laser output threshold and the decrease of the conversion efficiency and output power. A scheme for obtaining a narrow spectral width and high power mid-infrared laser without any spectral-width compression element is reported in this paper. In this scheme, narrow spectrum width and high power are separated and obtained respectively. A 1.064 渭 m ND. Narrow spectral width pumping source of YAG main oscillation power amplifier. The gain intensity of the PPMgLN crystal is controlled by adjusting the pump power and the diameter of the spot in the optical parametric oscillator, so as to effectively control the width of the infrared excitation spectrum in the crystal. In the optical parametric oscillator (OPO), when the pump power is about 3 times the threshold, 0.7W is obtained, and the spectral width is less than 2.9 渭 m of the 1.12nm. After passing through the two-stage optical parametric amplifier, 6.27W is obtained. The spectral width of 2.9 渭 m laser with 15.7% optical conversion efficiency is basically unchanged.
【作者单位】： 浙江大学现代光学仪器国家重点实验室;
【基金】：国家自然科学基金(61575172) 浙江省自然科学基金(LZ15F050001) 中国工程物理研究院高能激光科学与技术重点实验室开放基金(2014HEL04) 中央高校基本科研业务费专项资金
【分类号】：TN753.91;TN722.31;TN24
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