CW laser pumped emerald laser

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.     

Efficient modulation and coupling of CW junction laser light using electrooptic waveguides

The use of an electrooptical-waveguide modulator to achieve over 80-percent modulation of 7980-Å light from a room temperature laser diode operating at 10 mW CW is reported. The insertion loss of the modulator including couplers is 8.5 dB, and the output beam has high coherence.     

A new design concept for hollow-cathode white light laser

A white light laser has been constructed which employs a concentric cylinder type laser tube and embodies the novel concept of separating the functions of confining the negative glow providing for diffusion of Cd vapor. The main source preventing the white light oscillation in previous designs is not a lack of Cd vapor in lasing zone but a decrease of the hollow-cathode effect due to many holes of large diameter.     

Tunable CW alexandrite laser

Wavelength-tunable CW laser action has been obtained from solid-state alexandrite, BeAl2O4:Cr³⁺. Laser emission occurred between 744 and 788 nm with a maximum of 6.5 W observed at the 765 nm wavelength with 3 kW of mercury arc excitation.     

Phase modulation to amplitude modulation conversion of CW laser light in optical fibres

We have measured the induced amplitude modulation of sinusoidally phase-modulated CW 1.5 ?m laser light propagating in a single-mode fibre. Amplitude modulation approaching 100% was observed for light phase-modulated at 4 GHz and transmitted through 50 km of fibre. PM-AM conversion produces a power penalty in coherent transmission systems.     

50毫瓦大功率氦-镉白光激光器的研究

本文介绍了放电长度为980毫米的笛形空阴极放电氦-镉白光激光器,采用外加热镉蒸发方式得到了54.2毫瓦的白激光输出.提供了管体结构的设计方法和白激光的输出特性.     

Room temperature CW operation of orange light (625 nm) emitting InGaAlP laser

An InGaAlP laser operating under continuous wave excitation, having a record short wavelength of 625 nm at room temperature has been constructed. This was accomplished employing a tensile strained ( Delta a/a=-1%) multiquantum well active region and a six pair multiquantum barrier structure.<>     

连续波Nd:YAG激光对人皮肤损伤阈值的研究

连续波1.06μm激光的损伤阈值经过动物实验及人皮肤实验.最后结果:中国人皮肤偏白者MRD_(50)为65.519J/cm~2,黄皮肤为60.989J/cm~2,偏黑者52.321J/cm~2.实验证明,皮肤色素的多少对Nd:YAG激光的吸收有明显的差异.     

High-efficiency tunable CW dye laser

An output power of 1 W is reported from a tunable CW dye laser pumped by 3.5 W of argon laser radiation. The nearly 30 percent conversion efficiency is achieved by using a very low-loss folded 3-mirror cavity and by pumping through a Brewster-angle dispersing prism.     

连续的DCN波导激光器

本文介绍了连续DCN波导激光器。激光管由直径4.8厘米、长2.5米的石英管组成,其输出波长为195微米和190微米,最大输出功率为30毫瓦左右。同时给出实验研究结果以及输出功率与其他参数之间的关系。     

33-W CW dye laser

A continuous rhodamine 6G jet stream dye laser was pumped by a high-power multimode argon laser. Using water with a viscosity-raising additive as a solvent, no thermooptical problems arose up to the available pump power of 110 W. The maximum output power of the CW dye laser was 33 W at an efficiency of 30 percent.     

A CW external-cavity surface-emitting laser

Room temperature, continuous wave (CW) operation of an external-cavity, optically-pumped surface-emitting laser is reported. The device is a resonant-periodic gain (RPG) vertical-cavity surface-emitting laser (VCSEL) with the top mirror stack replaced by an epitaxially grown antireflection (AR) coating. An external mirror having a 50-mm radius of curvature completes the resonator in a near hemispherical configuration. Mode spectra, input-output curves, and polarization properties of the device are presented.     

Gain in CW laser pumped FIR laser gases

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 CH3OH and three in CH2F2. 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.     

Efficient backward and forward pumping CW Raman amplification for InGaAsP laser light in silica fibres

By pumping a small-core single-mode silica fibre with a 1.32 ?m CW Nd:YAG laser, continuous-wave Raman amplification of InGaAsP laser diode light, with unsaturated gain as high as 21 dB, has been obtained in both backward as well as forward pumping configurations.     

连续Nd~(3 ):YAG激光对视网膜损伤阈值的研究

连续Nd~(3 ):YAG激光照射青紫蓝灰兔眼100只,1000个照射点,求得照射时间平均1.02s及0.12s,检眼镜可见视网膜损伤阈值,其ED_(50)分别为角膜平均入射2.52W/cm~2及5.42W/cm~2.     

Dispersion-induced instability in CW laser oscillators

A CW-pumped laser with a short photon cavity lifetime may show an unstable output in the form of spontaneous pulsations or noise. In this paper, a model is developed which reconciles previous studies of unstable behavior in homogeneously and inhomogeneously broadened lasers. Specific regions of instability are predicted for xenon lasers, and it is concluded that some degree of inhomogeneous broadening makes the instability much more likely to be observed.     

氩离子激光泵浦的连续染料激光器的研究

一、引言 有关连续染料激光器的专题文章,在国外已有很多报导。 由于连续染料激光器具有输出功率高(从几百毫瓦至几十瓦)、转换效率高(大于30％),可获得优于10~(-5)埃的窄线宽,光谱覆盖范围宽,而且能够连续调频、连续运转等特点,因此,当这一器件出现后很快就被用于高分辨激光光谱学和激光分离同位素等新兴的学科领域。在许多应用中最引人注目的例子是利用该器件首次成功地分离了铀、钙、氯以及多种稀土元素的同位素,并在无多普勒加