Theoretical and experimental investigations of the Mid-IR DFG tuning property based on fiber laser fundamental lights
Theoretical and experimental investigations of the Mid-IR DFG tuning property based on fiber laser fundamental lights
复制标题
DOI：
10.1007/s00340-011-4479-2
复制
发表时间：
2011-04
期刊：
影响因子：
--
通讯作者：
J. Chang;Q. Mao;S. Feng;J. Jiang;X. L. Li;Y. Y. Tian-Y.-;C. Xu;W. Q. Liu
中科院分区：
文献类型：
--
作者：
J. Chang;Q. Mao;S. Feng;J. Jiang;X. L. Li;Y. Y. Tian-Y.-;C. Xu;W. Q. Liu
利用可调谐的YDFL和EDFL基光，研究了基于均匀光栅PPLN的中红外DFG激光器的调谐特性。我们的结果表明，对于固定的晶体温度，当EDFL调谐时，怠速可调范围小于10 nm。尽管可以允许泵在其两个QPM接受频段内进行调谐，但在固定温度下，怠速可调范围仍然很窄。然而，通过优化晶体温度，两个泵浦准调频接收带可以重叠形成一个宽带准调频带，这可以用来将闲置调谐范围扩大到3.4nμm附近的175m。通过调节温度，可以连续移动单个信号和两个分离的泵浦QPM接受带的位置，这也可以用于提高怠速调谐范围。通过调谐掺铒光纤激光器的温度，获得了1.05、1.08和1.11μm三个固定泵浦波长下的2.98~3.78μm的综合闲置调谐范围。通过在两个独立的μ接收波段调谐掺铒光纤激光器，只有一个固定的信号波长为1.58 m，获得了690 nm的调谐范围。
The tuning properties for the mid-IR DFG laser based on uniform grating PPLN have been investigated with tunable YDFL and EDFL fundamental lights. Our results show that, for a fixed crystal temperature, the idler tunable range is less than 10 nm when the EDFL is tuned. Although the pump may be allowed to be tuned in its two QPM acceptance bands, the idler tunable range is still narrow for a fixed temperature. By optimizing the crystal temperature, however, the two pump QPM acceptance bands may be overlapped to form one broadband QPM band, which may be used to increase the idler tunable range to 175 nm near 3.4 μm region. The positions of the single signal and the two separate pump QPM acceptance bands can be continuously moved by adjusting the temperature, which may also be used for enhancing the idler tuning range. By tuning the EDFL while adjusting the temperature, a whole combined idler tuning range between 2.98 and 3.78 μm was experimentally obtained with three fixed pump wavelengths of 1.05, 1.08 and 1.11 μm. By tuning the YDFL in the two separate QPM acceptance bands, a tuning range of 690 nm has been demonstrated with only one fixed signal wavelength of 1.58 μm.