波导N2激光泵浦的染料激光器

波导Ｎ_２激光泵浦的染料激光器分子氮激光器由于其本身相当简单和价格低廉，因此广泛用作染料激光器的相干泵浦源。氮激光振荡短波长能激励一系列染料，他们的激光辐射能在紫外到近红外宽广的光谱区内调谐。当染料激光器的振荡能量要求不高时（例如在纤维光学和光谱学中?..     

波导激光器的研究进展与展望

首先综述了气体波导激光器、空芯光纤气体激光器和固态波导激光器的发展史,然后分别介绍两类激光器的工作原理,最后根据两类激光器的发展现状对未来的研究进行了展望和分析。     

用于光电流光谱研究的半导体激光器的线性温度调制

利用自行设计的电子反馈控制线路 ,将半导体激光器频率作线性调谐 ,使激光频率能连续调谐达 6 0GHz而不发生跳模 (modehopping)。利用这种线路量取的锂2S 2P 谱线 (6 70 8nm) ,连超精细结构 (HFS)都能看见。     

光电流稳频复合腔调谐CO_2波导激光器的研究

研究了CO_2波导激光器光电流效应及光电流稳频、复合腔调频的CO_2波导激光器系统。获得60条谱线连续分立输出。单线最大输出功率为8W,长时间稳定度优于1％。     

带有光束变换器的环波导激光器

介绍了一种新颖结构的环波导CO2激光器.该激光器采用全金属环状波导管,结构完全实现了扩散冷却、体积整体缩放的技术要求与器件微小型高功率化要求.根据激活介质为中空、环状的特性,把常规所用的输出镜改用正角锥透镜.正角锥透镜的底面与一个平行平面铜全反射镜构成平行平面激光谐振腔.该器件环波导区宽度为2.25 mm,谐振腔长为200 mm,输出镜透射率为10%.当器件工作在最佳工作总气压约104 Pa,最佳工作气体分压比:CO2∶N2∶He∶Xe=1∶1∶6∶0.5,采用横向射频激励时,观察到145 W激光功率输出,总的电光转换效率为11%.若无光束变换器时,该器件输出光束为平行的环状光束.光束变换器是由正角锥输出镜与一块用同一种材料做成、具有相同棱角的负角锥透镜构成.可以根据应用要求,调节出射的光束宽度与横向模式分布.(OC39)     

Use of an opto-galvanic effect to frequency-lock a continuous wave dye laser

An electrical signal, derived from a gas discharge irradiated by a CW dye laser, is used to lock the laser to characteristic transition frequencies of species in the discharge. The technique may be used with commercial hollow cathode lamps to lock to both resonance and excited state transitions in a wide variety of elements.     

利用光波导进行准分子激光打孔的加工系统研究

分析了现有准分子激光打孔系统的优缺点,研究了对经过光波导的光束进行掩模打孔的一套加工系统。对光波导的制作进行了分析,并进行了一系列实验,文中给出了试验结果和分析。     

Stark effect on FIR waveguide laser action

Some experimental results of the application of small electric fields on an optically pumped metal-dielectric far infrared (FIR) waveguide laser are shown. It is demonstrated that sizable modulation of the FIR output power can be obtained with ac fields.     

Glass waveguide laser

A channel waveguide fabricated in a Nd³⁺-doped laser glass by the ion exchange method is discussed. The device was end-fire pumped by a diode-laser operating at 802 nm. Continuous-wave (CW) lasing was observed at 1054 nm, and maximum output power was higher than 150 mW. The large output power was achieved by increasing the radius of the waveguide     

激光穴位麻醉的研究与推广

近年来应用冷激光即低功率激光代替银r针照射穴位镇痛的研究已引起国际生物医学界的广泛重视。国外进行激光针刺（Lase Acupuncture）镇痛的动物实验性研究，最早始于加拿大Plog．F．M．W（1973）。Kroy（1975）研制成第一台激光光针器（Akuplaser SystemPlog）。     

光电流光谱测量CO_2激光动力学参数

分析了CO_2-N_2-He激光介质中调制CO_2激光的光电压波形,其幅度除正比于CO_2(00~o1)能级粒子数的变化量外,还与CO_2分子跃迁能级的热弛豫速率有关。测量得到的光电压与增益、光强、动态阻抗和温度的关系可用类似于CO分子光电流的解析式来表示。     

A single-mode waveguide laser

A laser has been constructed in which a neodymium-doped glass slab forms the core region of a single-mode optical dielectric waveguide. The observed laser output is in a single, spatially coherent, transverse mode, which is characteristic of the waveguide structure, and has a diffraction-limited beamwidth.     

The effect of waveguide dispersion on VLF timing systems

It is shown that VLF timing and navigation systems, which use two or more frequencies to resolve cycle ambiguities, may be in error when the propagation mechanism is dispersive. The error arises if the difference between group and phase velocity in such cases is neglected. At 10 kHz the error on a path 10 000 km long, for a reasonable daytime model of the earth-ionosphere waveguide, may be as much as 400mus for the first-order mode. If the second-order mode is dominant as it may be at night the error will be greatly increased.     

RF激励波导CO2激光器电光调Q实验研究

对用于激光主动成像雷达、运行于稳频选支模式的射频激励波导CO2激光器腔内插入CdTe电光晶体调Q实验进行了研究。计算了CdTe晶体的插入损耗并与实验结果取得了一致,对CdTe晶体和其配套的λ/4波片的热稳定性进行了研究,比较了加压式和退奢式电光调Q对激光脉冲特性的影响。激光调Q输出EH11模,重复频率41.67kHz,峰值功率达到360W,脉冲半宽度(FWHM)150ns。