激光技术, 2009, 33 (5): 509, 网络出版: 2010-03-11  

D形双包层大模场光纤激光偏振特性研究

Research on the polarization characteristics of D-shape large mode area double-clad fiber laser
作者单位
北京邮电大学 通信与光波技术教育部重点实验室,北京 100876
摘要
为了考察双包层光纤激光器的偏振行为,选用国产大模场D型内包层光纤,采用单端抽运的方法,测量了不同缠绕半径和不同抽运强度下光纤输出激光的偏振态。结果表明,激光器在阈值附近单波长运转时,如果光纤缠绕半径较小,输出激光表现出较明显的偏振特征,如果缠绕半径较大,输出激光偏振特征较弱;高于阈值多波长运转时,无论采用何种缠绕半径,都观测不到偏振现象。
Abstract
To investigate the polarization property of a double-clad fiber(DCF),the polarization states of a home made D-shape DCF laser at different coiling radii and pump powers were measured under the condition of one end pump.Results show that when the laser operates at a single wavelength around the threshold level,the output laser shows clear evidence of polarization at a small coiling radius and that the polarization behavior of output laser is relatively weak at a large coiling radius.When the laser operates at multi-wavelengths above threshold power,there is no sign of polarization for the output laser independent of the coiling radius.

陆丹, 葛廷武, 伍剑, 徐坤, 林金桐. D形双包层大模场光纤激光偏振特性研究[J]. 激光技术, 2009, 33(5): 509. LU Dan, GE Ting-wu, WU Jian, XU Kun, LIN Jin-tong. Research on the polarization characteristics of D-shape large mode area double-clad fiber laser[J]. Laser Technology, 2009, 33(5): 509.

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