激光器

The main work can be summed up as follows: Firstly, we studied the thermal-field properties of VCSELs, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. Secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of VCSELs, and then studied the influences of the oxide-confining region with different position or thickness, and the different sizes of the gain-guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. Thirdly, we realized the coupling of electricity, optical and thermal-fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, Fermi levels and optical-field. Finally, we gave the equipotential line distributions with considering N-DBR and double oxidized-confining regions, and analyzed theinfluences of N-DBR and double oxide-confining regions on the distributions of the current density, carrier concentration, temperature and optical-field.

具体工作可以概括如下：首先，研究了VCSEL的热场特性，分析了电流扩展，材料参数和工作条件对于温度分布的影响；其次，从电极电压入手，计算出激光器中的等势线分布，并对不同深度处的电压和电流分布进行比较，研究了高阻区的不同位置和不同厚度、限制层和出射窗口半径的大小对电流密度、载流子浓度和温度分布的影响；再次，实现了电、光、热耦合，求出了阈值电压，计算了不同偏置电压下的电流密度分布、载流子浓度分布和热场分布，分析了温度和载流子浓度变化对折射率、费米能级和光场的影响；最后，给出了考虑N-DBR和双氧化限制层时激光器中的等势线分布，分析了N-DBR和双氧化限制层对VCSEL电流密度、载流子浓度、温度和光场分布的影响。

The wavelength of an actively mode-locked fiber laser based on erbium doped fiber amplifier was stabilized in the experiment.

在实验中对基于掺铒光纤放大器的主动锁模光纤激光器进行波长稳定，激光器的调制频率为10.06 GHz，观察到了良好的稳定效果。

Diode-pumped solid-state laser is solid-state laser, used laser diode instead of flash lamp to pumping laser m...

激光二极管泵浦的固体激光器是用激光二极管代替闪光灯去泵浦激光晶体的固体激光器。

Diode-pumped solid-state laser is solid-state laser, used laser diode instead of flash lamp to pumping laser media.

激光二极管泵浦的固体激光器是用激光二极管代替闪光灯去泵浦激光晶体的固体激光器。

ABSTRACT The laser diode pumped solid state lasers are that solid state laser, used laser diode instead of flash lamp to pumping laser gain materials.

激光二极管泵浦的固体激光器是用激光二极管代替闪光灯去泵浦激光晶体的固体激光器。

Comparing with traditional flash lamp, diode-pumped solid-state laser has a lot of advantages, such as lower thermal effect, higher efficiency, compactness, longer lifetime, stably, reliable and high power output with high beam quality.

与传统紫外波段的准分子气体激光器和长波段激光相比，激光二极管泵浦的全固态紫外激光器具有转换效率高、高重复率、性能可靠、体积小、重量轻、光束质量好及其运行成本低等优点。

A theoretical model is proposed to calculate the lasing wavelength of free-running Ytterbium-doped fiber lasers.

为了更好地设计掺镱光纤激光器，提出了一种用于确定自由运转的掺镱光纤激光器激射波长的计算模型。

By locking the laser the frequency jitter of less than ±250 kHz is achieved in 50 s, which is greatly improved comparing with the frequency fluctuation of about 3 MHz in the condition of free-running.

研究获得在50 s内激光器频率起伏小于±250 kHz，较相同时间内激光器自由运转时的频率起伏3 MHz有显著改善。

His system, known grandiosely as a 'large aperture scintillometer', consists of a laser on one side of a field, a telescope on the other, and a lot of clever computing to interpret what the telescope sees. What that computing is trying to measure is how much the laser beam twinkles as it passes across the field.

Kleissl的系统有一个响亮的名字："大眼睛闪烁仪"，它由以下几部分构成：农田某一边放置一个激光器，另一边有一个望远镜，然后通过大量电脑智能分析，以解析望远镜收集得来的数据：激光器发出的激光在穿过农田，到达望远镜之前闪烁的次数。

The properties of fermion causal Green's function is discussed according to the theory of spectral representation.

本文叙述了对称型GaAs-GaAlAsP双异质结激光器偏振特性的实验研究，分析了这种半导体激光器的模式竞争过程。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。