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     

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.     

High-repetition-rate continuously pumped ruby laser

The first successful operation of a high-repetition-rate repetitivelyQ-switched ruby laser is reported. Using an acousto-opticQswitch, repetition rates up to 5000 pps have been achieved. When the laser is optimized, peak power outputs of 20 kW at 500 pps and 8 kW at 2000 pps can be expected.     

连续锁模Ar~+激光器的噪声特性

本文从时域特性出发,分析了锁模Ar~+激光器中噪声的来源,假设表征光脉冲强度涨落的随机函数为A(t)=A_oexp[-i(Ωt+(?)_t)],得到描述光强涨落的噪声谱为罗仑兹线形,这与实验结果是一致的.     

CW iodine ion laser excited by an electron beam

CW laser oscillation has been obtained on the 5760.7 and 6127.5 Å transitions of singly ionized iodine in an He-I2plasma excited by a dc electron beam.     

CW operation of an intracavity pumped molecular submillimeter-wave laser

The 373-μm line of CH3CN was operated in a CW mode in an arrangement where the submillimeter (SMM)-wave laser is placed inside the resonator of the CO2pump laser. 1 mW of CW output power was obtained; this is five times the power of a comparable SMM-wave laser in the common extracavity arrangement. In a pulsed mode, a peak power of 46 mW was measured.     

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.     

Operation of an infrared dye laser synchronously pumped by a mode-locked CW Nd:YAG laser

Infrared dyes emitting around 1.3 μm exhibit fluorescence lifetimes τflof only ∼ 10 ps which are shorter than the duration of the pump pulses (t_{p} sim70ps). This fact results in performance characteristics different from those of visible dye lasers where the fluorescence lifetime is longer than tp. The pulse properties of IR dye lasers are investigated for various bandwidth-limiting elements. The generation of nearly transform-limited dye laser pulses as short as 6 ps-assuming a Gaussian temporal shape-is demonstrated.     

Gain saturation of CW laser pumped FIR laser gases

The saturation behavior of the 70 μm and the 119 μm transitions in CH3OH has been investigated both experimentally and theoretically. This knowledge is essential for constructing a complete model of the CW laser pumped FIR laser. Saturated gain measurements made in a single pass amplifier cell were found to be in good agreement with the theory of a quantum-mechanical three-level system in resonant interaction with two coherent fields. The calculation of the gain using the density matrix formalism yields a pump intensity dependent saturation, a result which is not predicted by the rate equation models.     

Simple dye laser repetitively pumped by a xenon ion laser

A rhodamine 6G laser and a cresyl violet laser emit light pulses of 0.3-μs pulse length and 10-20 W peak power at a rate of 120 Hz when pumped with an inexpensive xenon ion laser.     

The nitrogen ion laser pumped by charge transfer

Charge transfer from He+2to N2has been used in a variety of devices to pump significant levels of inversion of theB^{2}Sigma_{u}electronic transistion of N+2. Laser output has been achieved at three wavelengths, 391.4, 427.8, and 470.9 nm. Each has corresponded to a transition from the same upper laser level to lower levels having vibrational quantum numbers equal to 0, 1, and 2, respectively. With proper mirror sets each has been individually excited. Studies of the scaling and efficiency at which the laser output could be obtained have been made with devices pumped bye-beams, preionized avalanche discharges, and preionized resonant and traveling wave discharges. The possible efficiencies for the extraction of the energies stored in the inversions have been examined for various configurations of the coupling of the optical fields to the plasmas. Resulting devices have included self-excited oscillators, regenerative amplifiers, and master oscillator power amplifiers. The experimental results have supported a kinetic model which generally explains the unique features of the nitrogen ion laser. Of particular interest is the capacity of these systems to support the simultaneous optimization of both scale and efficiency. Withe-beam excitation optical power densities of 320 MW . l^-1have been achieved at a constant power transfer efficiency of 3 percent. With resonant discharge excitation 44 MW . l^-1have been demonstrated at power conversion efficiencies of 2 percent and overall efficiencies ranging from 0.2 to 0.4 percent. From these results the kinetic model has projected an overall efficiency of 0.9 percent to be ultimately realized in a discharge device.     

High-power single-frequency argon ion laser

Single-frequency oscillation has been obtained from an Ar laser of increased power level with the help of a three-mirror Smith reflector (power in the 4880-Å line was 2 watts). Equations and plots that permit the choice of optimum parameters of the three-mirror reflector are given. It is shown that for effective frequency selection in a high-power laser of great length it is necessary to use beam splitter reflectivities exceeding 0.5. Single-frequency lasers of this type may be used in holography.     

半导体泵浦连续波Cr:LiSAF可调谐激光器的研究

报道半导体泵浦连续波运转的Cr:LiSAF激光器。在泵浦入射功率为148mW时,得到2mW的连续波输出。输出波长为866nm.当在腔内放置色散元件后,其调谐范围是835.5～893.8nm.并对实验结果进行了分析。     

Ar~+泵浦连续波染料激光器谐振腔的设计与分析

本文叙述了三镜折迭腔和四镜环形腔的设计,着重分析了腔的调整对谐振腔的一些特性的影响.     

红宝石激光泵浦掺铬钨酸锌的激光特性

我们采用丘克拉斯基法生长出ZnWO4:Cr3+单晶,并测到该晶体从800～1100nm的宽带荧光发射,用红宝石激光器泵浦φ5mm×17mm的晶体棒,获得400μJ的0.95μm红外脉冲激光。     

Fiber-DFB laser array pumped with a single 1-W CW Yb-fiber laser

A 50-GHz grid fiber distributed feedback laser wavelength-division-multiplexing transmitter source is demonstrated pumped by a single continuous-wave Yb-fiber laser source at 977 nm. Up to 21 mW of output power is achieved per channel with maintenance of key operational parameters. The performance of this single Yb-fiber laser pump configuration is also compared with that of a semiconductor pump configuration which shows no degradation for all the important parameters.     

连续运转Ar~+激光器的最佳气压分析

本文从 Tonks-Langmuir 低气压放电正柱理论出发,推导氩离子激光器输出功率和充气压力的关系,由此求得最佳气压,讨论了最佳气压的影响因素,并与实验结果相比较。     

LD泵浦全固态连续Nd:LuVO4-LBO 533nm绿光激光器

报道了采用888 nm的激光二极管(LD)泵浦Nd:LuVO4晶体得到1066 nm的激光输出,其中Nd:LuVO4晶体对应能级跃迁为4F3/2→4I11/2.在注入抽运功率为18.3 W时,可获得11.2 W的近红外激光输出;然后采用非线性晶体LiB3O5 (LBO)进行腔内倍频,获得了533 nm的绿激光输出,输出功率为4.2W,其光-光转换效率为23％,4h功率稳定度优于±3.7％.     

New CW FIR laser action in optically pumped vinyl chloride

Thirty-four new FIR lasing lines are reported in vinyl chloride optically pumped by a CO2laser. Ten of them are observed when using pump lines belonging to the 10.8 μm hot band.