lasing造句

• The character of fiber laser spectrum is measured by optical spectrum analyzer . the experiment approves the relationship of loss , threshold and lasing wavelength , which is that the higher loss , the higher threshold , and the shorter lasing wavelength
  我们用光谱仪测量了激光光谱特性，实验研究了腔损耗及阈值和激射波长的关系，即损耗越大阈值越高，激射波长越短。
• The develoment history of organic materials for frequency - upconverted lasing was briefly presented . organic upxonverted laser systems were reviewed and the relationship between lasing properties and molecular structures were discussed
  摘要简要介绍了有机上转换激光材料的大致发展历史。综述了有机上转换激光材料的一些体系，并就上转换激射性质与分子结构之间的关系进行了探讨。
• ( 3 ) with the increase of the injected current , the lasing wavelength of fgesl appears fluctuation , the side mode suppression ratio ( smsr ) increases accompanied by an oscillation , and the p - i curve distorts slightly
  Fgesl的激射波长随ld的注入电流的增大而发生波动;边模抑制比( smsr )随注入电流的增大总体上呈现上升趋势，但其变化过程并不平滑而是有较大的波动; fgesl的p一i曲线有微小的扭曲。
• Zno is a directed band semiconductor with a big binding energy . it has gained substantial interest because its large exiton binding energy ( 60mev ) , which could lead to lasing action based exiton recombination even above room temperature , such as led , ld and so on
  Zno是一种宽禁带的直接带隙半导体材料,具有非常高的激子束缚能( 60mv ) ,即使在室温条件下激子也不会分解,因此可以被用作光发射器件,如led和ld等。
• The study of lasing without inversion ( lwi ) is an important and active research front field in international lasing physics nowadays . the study of lwi has not only an important theoretical value , but also wide application prospects
  无粒子数反转激光( lasingwithoutinversion简称lwi )的研究是当前国际上激光物理重要而活跃的研究前沿领域之一，无粒子数反转激光的研究不仅具有重要的理论价值，而且具有广阔的应用前景。
• The study of lasing without inversion ( lwi ) is one of the most important and the most active research field of lasing physics internationally nowadays . there are not only important theoretic value but also wide applied prospect in the study of lwi
  无粒子数反转激光（ lasingwithoutinversion简称lwi ）的研究是当前国际上激光物理最重要、最活跃的研究前沿领域之一， lwi的研究不仅有重要的理论价值而且有广阔的应用前景。
• Even so , the instability sometimes accompanied by mode hoping of the lasing wavelength of the fgesl , and the instability of output power have been experimentally observed . the objective of this work is just to explain these experimental phenomena and explore the physical mechanism hidden in these phenomena
  尽管fgesl具有这些优点，但是由于其本质上还是属于外腔激光器，因此仍具有外腔激光器通常存在的激射波长不稳定、跳模及输出功率不稳定等现象。
• We study the time evolution law of the atomic response in an open - type inversionless lasing system when the probe or driving field is off - resonance , and compare the law with that obtained when the probe and driving fields are resonant . we find that the detuning has considerable effects on the time evolution law : when the probe or driving fields is off - resonance , the dispersive responses for the probe and driving fields are no longer 0 and the two - photon coherence is no longer a pure real ; the variation of the probe detuning can make the time evolution law of the population distributions and the gain ( absorbtion ) of the driving field changing obviously ; with detuning increasing , the time evolution behavior of the gain ( absorbtion ) , dispersion of the probe field and the two - photon coherence will gradually diviate from the evolution law of the standard damped oscillator ; with the driving detuning increasing , the oscillating time of the dispersion of the driving field becomes longer , the amplitude and the stationary value increase
  研究了探测场或驱动场失谐情况下开放的型无粒子数反转激光系统中原子响应的时间演化规律,并与探测场和驱动场都共振时的演化规律进行了比较.我们发现失谐对时间演化规律有显著的影响;当驱动场或探测场失谐时,原子对探测场和驱动场色散的响应不再为零,双光子相干不再是纯实量;探测场失谐的变化将使粒子布居和驱动场增益(吸收)的时间演化规律明显改变;随着失谐的增大,探测场增益(吸收) 、色散和双光子相干随时间的演化行为逐渐偏离标准阻尼振子的演化规律;驱动场色散驱动场失谐量的增加而振荡时间变长,振幅和稳定值变大
• 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。
• ( 2 ) under certain temperature , for a short external cavity , a slight change of the external cavity length will result in an obvious variation of the lasing wavelength ; and for a long external cavity ( > 10cm ) , the change of the external cavity length gives almost no effect on the lasing wavelength
  当温度保持一定时，对于短外腔，外腔长度的微小变化可以导致fgesl的激射波长产生显著的变化;而对于长外腔(尤其当外腔长度大于10cm )时，外腔长度的变化对fgesl的激射波长基本没有影响。
• Numerical simulations show that : ( 1 ) owing to the temperature variation resulting in the change of the refractive index of both the semiconductor medium and the fi ber , and further inducing the shift of the longitudinal modes of the fgesl , the lasing wavelength of the fgesl has a shift tendency to longer wavelengths with the increase of the temperature ; the mode hopping happens for a short external cavity and disappears for a long external cavity
  数值模拟的结果表明:由于温度变化造成半导体介质和光纤的折射率发生变化从而导致fgesl的纵模发生移动，因此fgesl的激射波长随着温度的升高将存在向长波长方向发生移动的趋势，对于短外腔， fgesl的纵模间距较大，半导体介质折射率随温度的变化程度大于光纤折射率随温度的变化程度，因而存在模式跳跃现象;对于长外腔，由子fgesl的纵模间隔很小，因而不存在明显的模式跳跃现象。
• In chapter 3 , we studied the effect of gaussian transverse profile for the driving and laser fields on lasing without population inversion ( lwi ) in a closed v - type system and an open v - type system . moreover , we discussed also the effect of the unsaturated gain coefficient , the cavity - damping rate , the ratio of the atomic injection rates and atomic exit rate on the corresponding systems . in chapter 4 , we mainly discussed the effect of doppler broadening on the gain , dispersion and the frequency up - conversion of the open v - type lwi system and compared the differences and the same between the open system and the corresponding closed system
  发现： ( 1 )在考虑doppler展宽的情况下，通过选取合适的实验室条件(比如合适的原子环境温度等)可得到合适doppler展宽值，从而使系统获得最佳增益； ( 2 )要想实现系统的频率上转换，同时又要获得足够强的无反转激光增益，则系统频率转换比不能选取的太大； ( 3 )对于开放系统，比较小的粒子注入速率比与退出速率对产生无反转激光是有利硕士学位论文摘要的： （ 4 ）由于dopp1oy展宽的存在，当探测场与驱动场的传播方向相反时，增益在探测场失谐的某一段区域产生振荡，且振荡的振幅、频率失谐范围的大小与dopper展宽的取值有关。
• It is widely accepted that zno is one of the most promising materials for producing an ultraviolet laser at room temperature due to its wide direct band gap ( eg = 3 . 3ev ) and large excitonic binding energy of 60 mev , which was testified by the results of optically pumped stimulated emission and lasing from zno thin films
  氧化锌作为一种宽带隙半导体（ 3 . 3ev ） ，激子束缚能大（ 60mev ） ，在室温下容易获得强的激子发射，而且可能成为紫外激光的重要材料。因此，对氧化锌的研究已成为继gan之后宽带隙半导体研究的又一热点。
• The analytical solutions of the gain , dispersion and population difference in the steady state of an open ladder lasing without inversion ( lwi ) system are at first given when the phase fluctuation of the driving field is considered . then the effects of the driving field phase fluctuation on the gain , dispersion and population difference are analyzed by the numerical results from the analytical solutions . our research shows that the phase fluctuation of the driving field will results in a finite line width ; with the line width increasing , the gain decreases monotonously , however , variation of the dispersion isn ? t monotonous , it has a maximum value when the line width takes some value ; the line width varying can ? t lead to change lasing from without to with population inversion
  给出了有驱动场位相涨落的开放的梯型无粒子数反转激光( lwi )系统增益、色散和布居数差的定态解析解,进而用得到的数值计算结果分析了驱动场位相涨落对增益、色散和布居数差的影响.研究结果表明,驱动场位相涨落将导致有限线宽;随着线宽的增加,系统增益单调地减小,但系统色散的变化并不是单调的,当线宽取某个值时,色散有极大值;线宽的变化不能导致无反转激光向反转激光的转变
• The work mechanism of the novel laser is introduced , and the math expression of efficiency is given , and the lasing mode and the distribution of the optical field are simulated . it proves that for the novel laser , the inner quantum efficiency is larger than l , and at the same injecting current compared with the normal laser ; the output optical power is higher
  介绍了新型隧道级联结构激光器的工作机理，理论推导了新型结构激光器的效率数学表达式，模拟了激光器激射模式及内部光场分布，并用实验证明了新型结构激光器能够实现内量子效率大于1 ，且在不高的电流注入条件下获得了较高的功率输出。
• On describing a genetic algorithm ( ga ) , we present a method for applying ga to optimize the lasers . a programming is presented for obtaining the maximum laser power . by using the method we optimize the cvl and the co2 laser , including lc circuit parameters of the cvl , the cvl system , the lasing resonator and the gas components mixtured in the co2 laser tube
  在这个部分中，首先简述了遗传算法，讨论了应用遗传算法来优化激光器的思想和方法，给出了优化大功率激光器的计算机程序设计；然后，对铜蒸汽激光器lc放电电路、大口径激光器和激光器系统分别进行了优化；对二氧化碳激光器谐振腔和气压参量分别进行了优化，介绍了优化二氧化碳激光器谐振腔的实验以及实验所获得的结果
• Quantum coherence and interference have led to the observation of many new effects and new techniques in quantum optics and atomic physics . examples include coherent population trapping , electrom agnetically induced transparency , lasing without inversion , and enhancement of the index of refraction without absorption
  当应用相干场来驱动光学介质时，可以使得介质的吸收和色散关系发生极大改变，产生许多新的效应，如相干布居捕获、电磁诱导透明、无反转激光、无吸收折射率增强等。
• For micro - cavity semiconductor laser , station model is proposed in this paper and its steady - state and instantaneous characteristics when the coupling efficiency of spontaneous emission into a lasing mode is equal to 1 are analysised . for current noise , sp noise , noise , p noise , as well as current modulation , sp modulation , modulation and p modulation , using small - signal approximation , we derive the laser ' s corresponding transfer functions . and we calculate their signal - to - noise ratio ( snr ) gain in various parameters through frequency domain analysis in the premiss of large input snr
  本文对于微腔半导体激光器，提出站模型，能够较直观简洁地分析微腔半导体激光器的稳态和瞬态特性，利用此模型对具有重要实用价值的= 1的微腔半导体激光器进行了讨论；对于电流i噪声、自发发射寿命_ ( sp )噪声、自发发射因子噪声、光子寿命_ p噪声，以及电流调制、 _ ( sp )调制、调制、 _ p调制，在小信号近似下，得到了相应的激光器的传递函数；在大信噪比的前提下，对激光器进行了频域分析，分别计算了它们在不同参数下的信噪比增益，分析了其抗噪声性能。
• However , the emission wavelength of a dfb - ld needs to be carefully turned on the predetermined wavelength grid by adjusting both laser temperature and bias current . furthermore , dfb - ld has such drawbacks as a relatively large variation of the lasing wavelength with ambient temperature ( ~ 0 . 1nm / c ) which restricts its application in dwdm systems
  然而dfb - ld的激射波长受温度( 0 . 1nm )和偏置电流的影响较大，只有通过调节dfb - ld的温度和偏置电流，其激射波长才能被调谐在预置的波长处。