lasing造句

• In this paper , we study inversionless lasing of frequency up - conversion in an open v - type system with incoherent pump . making theoretical analysis and numerical calculation by density - matrix equations of motion , we derive the conditions for the onset of lwi and discuss the effects of the parameters of the system , the detuning of driving field and probe field on the gain , and discuss nonlinear effect in the frequency up - conversion regime . we also give stability and transient analysis
  本论文研究了具有非相干泵浦的开放v型系统频率上转换无粒子数反转激光，利用密度矩阵运动方程，通过理论分析和数值计算，得出该系统产生无粒子数反转激光的条件，讨论系统各参数的变化和驱动场与探测场的失谐对激光增益、色散和粒子数差的影响，还讨论了频率上转换区域的非线性效应，分析了增益的稳定性及系统的瞬态演化过程。
• Usually , it is thought that the lasing wavelength of a fgesl is locked at the bragg reflection wavelength of fiber grating ( fg ) . owing to a relatively small dependence of the reflection spectrum of fg on ambient temperature ( - 0 . 01nm / c ) , the lasing wavelength of a fgesl is thought to behave more stable than that of a dfb - ld
  由于fgesl的激射波长主要由光纤光栅( fg )的布拉格波长确定，因此选择具有合适布拉格波长的fg就能使fgesl的激射波长处于预置波长处；同时，由于fg的布拉格波长受温度变化的影响相对较小( 0 . 01nm ) ，因此fgesl与dfb - ld相比具有更高的温度稳定性。
• On the basis of the deep study of the current studying situation of multi - wavelength fiber lasers and its tendency of development , we make clear the significance of the study of multi - wavelength fiber lasers and propose a novel multi - wavelength erbium - doped fiber ring laser at room temperature . in this thesis , firstly , with the rate equation theory , we use analytical methods to deduce the relationships of the lasing wavelength and output power vs erbium - doped fiber length , coupler ratio and intracavity losses . the experimental results show a good agreement with the calculated values
  本文首先从速率方程理论出发，利用解析的方法推导出掺铒光纤激光器输出特性参数与掺铒光纤和耦合器参数之间的定量关系， (如，激光输出功率、波长与掺铒光纤的长度、掺杂浓度、耦合器耦合比及腔的损耗等参数之间的关系) ；并从实验上加以分析讨论，实验结论与理论值相吻合；利用改变耦合器的耦合比获得了几个nm的波长调谐。