| 1. | The reason for the differences in the spectral purity with regard to longitudinal mode content of the lasers is still not clear .
关于这种激光器中，造成纵模成分的纯度有差别的原因，现在仍不清楚。 |
| 2. | Single longitudinal mode laser
单纵模激光器 |
| 3. | Design of wide - band longitudinal mode piezoelectric transducers with impedance matching layers
具有阻抗匹配层的宽带纵向振动压电换能器设计 |
| 4. | It is discoverde that with a looped feedback circuit , the dds acousto - optic mode locking has the function of tracking the frequency interval of the laser resonator longitudinal mode , and stabilizing the quality of the laser beams
Dds声光锁模器在增加闭环反馈环路后，可以跟踪激光谐振腔纵模频率间隔变化，稳定激光光束输出质量。 |
| 5. | At first , we introduced the velocity equation of dpssl , which operates in the multi - longitudinal modes . then , we give the dynamic equation of intracavity doubled - frequency dpssl , when we take in the shg ( second harmonious wave generation ) equation
本文首先介绍了固体激光器多模运转的速率方程，结合二次谐波的产生方程，给出了内腔倍频固体激光器的动态方程。 |
| 6. | Two - segment distributed feedback ( dfb ) semiconductor lasers can achieve tuning with single longitudinal mode in a certain wavelength range ; at the same time , its superiority also includes bistablity and wavelength conversion
其中，两段式分布反馈( distributedfeedback ， dfb )半导体激光器可以在一定波长范围内实现单纵模、可调谐工作；同时，它还具有双稳、波长转换等功能。 |
| 7. | The subject mainly studies the splitting phenomena of laser longitudinal mode and the transmitted resonant mode of fabry - perot etalon using electrically controlled birefringence of liquid crystal , so as to find a new approach to obtain the dual - frequency laser output
本论文主要研究利用液晶的电控双折射效应分裂nd ： yag激光纵模和f - p标准具谐振模，以寻求产生双频激光输出的新途径。 |
| 8. | Therefore , the frequency - stabilised double longitudinal modes with thermoregulation were adopted . this method was realised by winding wire with high electrical resistance on to the neck of laser tube . heating was controlled by self - organised fuzzy control method
为此，提出了增加有缠绕于激光管颈上的电阻丝辅助加热控制环节的自四川大学博一l :学位论文组织模糊控制双纵模热稳频方法。 |
| 9. | In this work , based on the threshold condition of the fiber grating external cavity semiconductor laser ( fgesl ) which the phase of the fiber grating has been included , the effect of the temperature variation and the fg external cavity length on the lasing wavelength of the fgesl has been investigated theoretically . in addition , we have used the phase condition of fgesl to get the longitudinal mode distribution of fgesl , then the influence of the injected current on the output characteristics of fgesl has been studied
基于此，本文中利用阳实际的反射相位分布，计及半导体激光器( ld ) 、外腔及光纤光栅( fg )三者的共同作用，根据fgesl满足的闽值条件，从理论上研究了温度及外腔长度的变化对fgesl激射波长的影响;根据fgesl中纵模所满足的相位条件得到其纵模分布后，利用fgesl满足的多模速率方程，研究了ld的注入电流对fgesl输出特性的影响。 |
| 10. | Vertical - cavity surface - emitting lasers ( vcsel ' s ) have distinct advantages over conventional edge emitting lasers , such as small divergence angle , single longitudinal mode operation and very low threshold current . they are especially suitable for making two - dimensional ( 2 - d ) arrays as well as vcsel ' s based integrate devices
垂直腔面发射半导体激光器( vcsel )与传统的边发射半导体激光器相比，它具有发散角小、单纵模工作、非常低的阈值电流等优点，尤其它适于二维面阵集成和与其它光电子器件集成。 |
