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
( 4 ) the frequency modulation effects of positive dipole ( unipole ) forcing source on lfo is stronger than negative dipole ( unipole ) , and the wave oscillation quicken evidently ( 4 )正偶(单)极强迫源对大气低频振荡的调制作用强于负偶(单)极,波动振荡明显加快。