D . c hanna , r . m percival . continuous - wave oscillation of a monomode ytterbium - doped fibre laser [ j ] . electronics letters , 1988 , 24 ( 17 ) : 1111 - 1113 张强.掺镱双包层光纤激光器实验研究及圆盘光纤激光器设计[ d ] .硕士学位论文, 2003年,天津大学
3 . we study how to improve the pump efficiency in a double clad fiber laser . several traditional pumping methods are considered and the light propagation 其中双包层光纤的结构、内包层的形状、泵浦光入纤方式等是这项技术的关键所在。
The double - clad fiber ( dcf ) with truncated inner cladding has much better absorption efficiency to optical waves than dcf with circular inner cladding 摘要缺陷型内包层双包层光纤由于其特殊的内包层横截面结构，对于光波的吸收效率要比理想圆型内包层双包层光纤提高许多。
To sum it up , some optimization methods of the dcfls design are gained in this dissertation , and all these methods can conduct the experiment of dcfls 通过对多点泵浦光纤激光器的数值和理论分析,得出了一些有用的结论,这些结论对双包层光纤激光器的结构优化具有指导意义。
The littrow grating tuning method is employed for the first time in double cladding fiber lasers . by tuning the angle of the grating , we have achieved a tuning range of more than 40nm . 6 （ 5 ）首次将littrow光栅调谐技术应用到掺双包层光纤激光器中，实现了可调谐包层泵浦光纤激光器，波长可调谐范围大于40nm 。
4 . we have studied the fiber bragg gratings formed in double - clad fibers , with and without hydrogen loaded , via the phase - mask method . a phase - shifted moir fiber bragg grating is also fabricated in double - clad fiber 四、对在双包层光纤中制作光纤光栅进行了研究,制作出了一种用于双包层光纤激光器选频的光纤光栅。
From the theoretic analyses , we draw the conclusion that the pump power can be heighten by adopting the eccentric core double - clad fiber . and we put forward a new coupling technology : micro - prism technology 通过理论分析得出了用偏芯型双包层光纤可以进一步提高泵浦功率的结论。并提出了一种新型的泵浦光耦合技术：微型棱镜技术。
It has promising prospect in material processing , laser welding , medicine treatment and military . in this paper , the double - clad fiber , the fundamental principle and key technologies of double - clad fiber laser are introduced 本论文介绍了双包层光纤，对双包层光纤激光器的工作原理进行了论述，分析了它的关键技术及其实现方法。
Results showed that it was realizable by taking such measures as using high inner - clad numerical aperture , appropriate rare - earth doped double - clad fiber and decreasing transmission loss of sunlight 计算结果表明，通过采用内包层数值孔径较大、掺杂适当稀土元素的双包层光纤及减小太阳光传输过程中的损耗等措施提高光纤激光器对太阳能的吸收效率，可以实现太阳能直接抽运光纤激光器。
The principle of double cladding fiber laser is analyzed , simply illustrated the principle and drawbacks of noncoherent beam combination , the coherent beam combination method of multiple optical power amplifier and its advantages are discussed in detail 分析了双包层光纤激光器的工作原理，简单介绍了非相干组束的原理和缺陷，重点阐述了并联主振荡相干组束方法及相干组束的优势。
