共查询到20条相似文献,搜索用时 31 毫秒
1.
CW laser pumped emerald laser 总被引:2,自引:0,他引:2
A CW laser pumped emerald laser is reported, A 34 percent output power slope efficiency is observed with longitudinal pumping by a krypton laser in a nearly concentric cavity. The laser has been tuned from 728.8 to 809.0 nm, Losses in emerald are larger than those of alexandrite determined in a similar cavity. Our data also indicate that the excited state absorption minimum is shifted from that of alexandrite. 相似文献
2.
YAG laser operation by semiconductor laser pumping 总被引:1,自引:0,他引:1
Yttrium aluminum garnet (YAG) laser operation has been achieved using a single gallium arsenide laser diode as the pump. Repetition rates of 200 pulses per second have been achieved in initial experiments. Compared to flashlamp pumping, semiconductor laser pumping requires less. than 5 percent of the light energy to accomplish YAG lasing. Extraordinary repeatability of laser output, pulse to pulse, has been obtained. 相似文献
3.
激光的出现是人类科技史上的一个伟大进步,激光技术使得测量技术变得更加精确和方便。在地形测量、工程测量和航空摄影测量以及人造地球卫星测量、月球光学定位等航天测量中广泛应用。其中,激光测距是应用最为广泛和成熟的一种,它是集光学、激光、计算机和光电子及集成电子等多项技术为一体的综合性技术。无论是在科学技术、生产建设还是军事应用方面都有着重要的意义。 相似文献
4.
5.
本文叙述一种在一个泵浦周期内讯号脉冲三次通过染料池的微微秒激光脉冲放大器,它有效地利用泵浦能量,可以得到4×10~4的高增益,低的放大自发荧光以及没有脉冲变宽,并且结构简单,工作稳定。用四能级分子模型,以及作速率方程的数值解,对放大器的特性做了计算机模拟。计算与实验结果相符。 相似文献
6.
Breede M. Kasseck C. Brenner C. Gerhardt N.C. Hofmann M. Hofling R. 《Electronics letters》2007,43(8):456-457
An electronically controlled external cavity laser diode for fast wavelength tuning and multiple-colour lasing is presented. The spectral-tuning is accomplished by a digital micromirror device. Tuning of 47.4 nm with a tuning speed of 0.85 nm/ms was achieved. Simultaneous emission of up to 9 laser lines is demonstrated 相似文献
7.
This study is an investigation of the FIR radiation amplification in CW laser excited gases so essential for a complete quantitative understanding of the FIR laser cycle. The small-signal FIR gain coefficients have been measured as functions of the relevant parameters for two transitions in CH3 OH and three in CH2 F2 . The measurements, demonstrating the influence of coherent pumping have been compared to quantum-mechanical calculations of a three-level system, interacting resonantly with two coherent fields. The good agreement found between theory and measurements indicates the correctness of the theory in predicting the gain properties of the CW FIR lasers. Also FIR gain saturations have been measured directly and exhibit the expected features. 相似文献
8.
Efficient operation of a high peak power and high-average power infrared dye laser, continuously tunable over the range of 10810-12160 Å, has been achieved by pumping with an Nd:YAG laser. A peak power as high as 4 MW with an average power of 390 MW was obtained. 相似文献
9.
本文设计了用于机载激光引信的激光脉冲测距发射单元,该发射单元由激光器和驱动电路构成.激光器选择纳秒级脉冲大功率固体激光器,采用半导体激光二极管作为泵浦源,提出了一种获取同步信号的方法,并对其整体结构进行了考虑.为满足引信特殊需要,为半导体泵浦固体激光器设计了专用驱动电路,解决了固体激光器在不同温度下重复频率不稳定性问题,避免了使用体积庞大的致冷器.激光发射单元工作可靠,在很大温度范围内重复频率稳定并灵活可调.5 V电源时,输出峰值功率达2 018 W、脉宽3.3 ns、重复频率达10 kHz. 相似文献
10.
11.
Injection locking of a dye laser is reported for a 4-mirror ring-cavity dye laser pumped by a xenon-ion laser. Both a He-Ne laser and tunable CW dye laser were used as the injection sources. 相似文献
12.
A multiple-quantum-well infrared laser with phonon energy ≃ 0.1 eV is proposed in which electrons, injected into the excited level of the quantum well, are efficiently removed from the ground state level by the interband stimulated process. High carrier injection is needed to provide population inversion between these levels. Analysis shows that low temperature operation of this laser is possible for both electrical and optical carrier injection. Quantum-well materials with lower electron effective mass, such as InGaAs and InAs, are preferable for these purposes 相似文献
13.
14.
无序激光器激光出射的空间分布 总被引:1,自引:1,他引:0
讨论一种散射,导出相应的分布函数。分析增益区几何形状,运用蒙特卡罗法模拟光子在无序介质中的随机行走,得到激光出射的空间分布。结果表明:在界面法线方向,激光强度最强,随角度增大强度逐渐减弱,并且光强关于法线旋转对称。激光出射的空间分布与无序介质中光子平均自由程有关,据此可通过测量激光出射的空间分布来反推光子平均自由程。出射的激光光子绝大多数(一般95%以上)都是在离界面3个平均自由程距离内散射出来的。 相似文献
15.
We report 19 pure rotational HF laser transitions, 5 of which are new, from exploding-wire, metal atom oxidation lasers. The laser operates at F2 pressures as high as 500 torr and at a gain length of only 0.24 m. The laser pulses are1-4 mu s duration and deliversim10^{-4} J/pulse. 相似文献
16.
Theoretical and experimental results are presented for a pulsed far-infrared (FIR) molecular gas laser with high intensity laser pumping. In these FIR lasers, high intensity pumping is found to produce stimulated Raman emission at very large offsets (up to 30 GHz) from resonance with the intermediate state. A theoretical, density matrix model is developed for these lasers to account for simultaneous Raman emission on rotational levels in the ground and excited vibrational states (double Raman resonance). This theoretical approach is necessary in the case of off-resonant, high intensity pumping. Theory predicts the FIR emission frequency, the FIR laser gain, and the pump threshold intensity as a function of pump laser frequency. Experimental results are obtained onP -,Q -, andR -branch transitions in12CH3 F and13CH3 F using a single-mode, grating tuned CO2 TEA pump laser with an intensity of up to 40 MW/cm2. Good agreement is obtained between theory and experiment for the observed values of FIR emission frequency and pump threshold intensity. These results indicate that a widely tunable (150-1200 mu m), pulsed FIR CH3 F laser could be constructed with a tunable, multiatmospheric CO2 pump laser of modest power (about 2-5 MW). 相似文献
17.
18.
19.