激光器

Broad area semiconductor lasers with a new no-absorption window has been designed considering cavity degradation of devices, peak power output has increased by 46.5 percent for the new structural device, perpedicularity divergence angle is up to 21°, parallel divergence angle is up to 6.1°.

通过研究大功率半导体激光器腔面退化机理，借助AlxNy等应力膜设计制作了一种新型非吸收透明窗口结构的宽条形半导体激光器，使器件平均最大输出功率提高46.5%，垂直发散角达到21°，水平发散角达到6.1°，2000 h加速老化试验，其千小时退化速率小于0.091%。

Firstly, we used the Raman scattering method which can calibrate in real time to measure the O2 (a1 Δ) yield of SOG for the first time in China. The measurement relative error is less than 8%. Based on the data from the experiments, we report the results that the diluent category and ratios influence the O2 (a1 Δ) yield. The relationship of P-τ values and the O2 (a1 Δ) yield of this SOG were given. The effects of distance and bypass of gas transportation on the O2 (a1 Δ) yield are investigated. Secondly, the chlorine utilization was measured by using Raman spectroscopy simultaneously when the O2 (a1 Δ) yield was measured. This method originated with us. The result about the chlorine utilization is coincident with other theoretic and experimental conclusions. The relationship given in this paper between gas stay time in SOG and chlorine utilization offers reference to improve the reaction efficiency and chemical efficiency of COIL. Finally, the partial water vapor pressure at the exit of SOG was measured by absorption spectroscopy. The water vapor fraction and partial pressure have trends changed with the generator total pressure, the diluentratios, and the BHP temperature. These experimental results are very important to improve experimental conditions of SOG, reduce the water vapor fraction, and enhance the output power of COIL.

由侧得的数据得到了加入稀释气体、稀释气体种类以及稀释比例对单重态氧产率的影响，给出了该发生器P一：值与仇产率的关系，还考察了传输距离对仇产率的影响；在国际上首创利用喇曼散射光谱法在侧量产率的同时进行了氯气利用率的检侧，侧试结果与其他理论及实验结果十分相近；给出了气体在发生器中的滞留时间与氯气利用率之间的关系，该结果为提高氧碘化学激光器的反应效率和化学效率提供了参考依据；另外采用了吸收光谱法对发生器出口处的水汽含量进行了测量、得到了水汽分压和百分含量随着发生器压力、稀释气体比例以及BHP温度等的变化情况，该实验结果对于改进发生器工作条件、减少水汽含量、提高氧碘化学激光器的出光功率具有十分重要的指导意义。

But as far application, one of the main problems is that its output power is not stable and the laser is easy to be destroyed because of transient circuit and voltage peak. In recent years, many researchers have been studying it.

但在实际使用中存在的主要问题之一是激光器的输出功率不稳定，而且瞬态电流或电压尖峰等许多因素都很容易损坏激光器，近些年来，有不少科研单位从事这一方面的研究。

Two He-Ne lasers have been designed in experiment,one with simplest 2D axisymmetric folded-combined cavity that are composed of a concave-plano-concave folded cavity and a plano-concave cavity , and other with simplest 3D axisymmetric folded-combined cavity that are composed of two concave-plano-concave folded cavities and a plano-concave cavity.

本文实验设计了由一个凹-平-凹折迭腔与一个平凹腔组合的二维轴对称折迭-组合腔型He-Ne激光器及由两个凹-平-凹折迭腔与一个平凹腔组合的最简单立体轴对称折迭-组合腔型He-Ne激光器。

Locking laser source to a proper frequency standard can obviously improve the laser's frequency stability.

将激光器锁定到合适的参考频率标准上，可以有效地改善激光器的频率稳定性。

Thermal effect would change resonant Q-factor, and influence laser stability and output beam quality.

输出窗的热效应改变了CO2激光器谐振腔的品质因数，影响激光器的稳定性和输出光束的品质。

The high efficiency and high power semiconductor laser with multi-active regions, which are cascaded by reverse biased tunnel junction can resolve the problems in theory and overcome these shortcomings.

通过反向偏置隧道结将多个有源区再生耦合级联起来的新型高效大功率半导体激光器从理论和实践上解决了传统激光器存在的上述问题。

In this letter, a detailed analysis of the working mechanism and characteristics of high power semi conductor laser with multiple active layers integrated by tunnel junctions was first made, and the math expression of efficiency was given.

在本文中，首先较详细的介绍了新型隧道级联多有源区大功率半导体激光器的工作机理和特点，理论推导了新型结构激光器效率的数学表达式。

Firstly, the heated distortions of the COIL resonator mirrors, laser window and an outside mirror and the perturbation of a length of air illuminated by the laser beam were successfully demonstrated using a 2-D shealing interferometer. The existence and the ponderance of the distortions are known, which makes things sporting the diagnosis and study.

在诊断研究中，首先利用二维剪切干涉仪对氧碘化学激光器的腔镜、窗口、腔外镜热变形和气流扰动进行了检测，确认了在高能激光器工作中这些热变形的存在及严重性，为诊断工作提供了可靠依据。

Traditional laser constant sources are mostly analogue products, whose function is singular, operation is troublesome, protect part is not perfect.

传统的激光器恒流源多为纯模拟的产品，功能单一，操作烦琐，对激光器的保护不完善。

What are your goals and strategies for growth?

你的成长目标和策略是什么？

And unto the angel of the church in Sardis write; These things saith he that hath the seven irits of God, and the seven star I know thy works, that thou hast a name that thou livest, and art dead.

3：1 你要写信给撒狄教会的使者，说，那有神的七灵和七星的，说，我知道你的行为，按名你是活的，其实是死的。