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简要介绍了EAST装置远红外激光干涉仪光源——DCN激光器的工作原理、结构和相关改进。DCN激光器采用He、CD4、D2和N24种工作气体。实验过程中,通过调节气体压强和阴极电流、改变各种工作气体配比等手段优化DCN激光器输出功率。实验结果显示:输出功率随电流的增大会达到饱和,在电流为1.0A输出功率达到最大;输出功率随压强先增大后减小,在压强为32Pa时达到最大值;工作气体的最佳配比为He: CD4: D2: N2=2:3:5:3。 相似文献
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In this paper, the density matrix equation of a six-level system has been solved, in case of the FIR wave signals in the system were not small enough to be neglected. The output power density of the laser system has been calculated by means of the iteration method. The saturation effect of the system has been revenled by the numerical calculation. Several sets of curves of laser output power vs, the length of laser with defferent pumping detuning and the optimum operating pressure under certain condition have been obtained. These calculated values were in good agresment with the data provided in the literatures. 相似文献
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基于单片机的LD控制系统的设计 总被引:1,自引:0,他引:1
为了实现激光器稳定、可靠和准确的功率输出,介绍一种基于单片机实现半导体激光器功率高稳定的控制系统。该系统以MSP430单片机为核心,根据半导体激光器的工作原理,设计了受控恒流源、温度控制系统和光功率反馈系统等部分。此外,系统还具有激光功率的实时控制、显示和设置以及软开关和软保护等功能。功率稳定采用光功率反馈法,温度控制采用高精度PWM驱动的半导体制冷器。光功率稳定度优于0.25%。 相似文献
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激光器系统中半导体激光器的功率输出稳定度和工作温度有很大的关系,为了使大功率半导体激光器输出功率稳定,需要对激光器实现高精度、快速温度控制。针对现有的激光系统中激光器温度控制系统存在控制精度不够高、控制速度慢等问题,设计了一种温度稳定系统,采用PT-100热电偶测量激光器温度,并使用最小二乘法对温度数据进行拟合,使得温度测量精度达到0.01 ℃;使用改进粒子群算法优化(PSO)的PID控制器实现温度控制。仿真实验和实际测试表明,所设计的温度稳定系统能够很好地控制激光器温度,达到目标温度所需的调节时间小于11 s,达到稳态后温度波动在±0.02 ℃内。与传统的温度控制方式相比,所设计的系统能够实现参数自整定并自动调节温度,对大功率激光系统中激光器温度具有良好稳定效果。 相似文献
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A. K. Nath T. Reghu C. P. Paul M. O. Ittoop P. Bhargava 《Optics & Laser Technology》2005,37(4):469-335
A transverse flow transversely excited (TFTE) CW CO2 with a maximum output power about 15 kW has been developed. This is excited by pulser sustained DC discharge applied between a pair of multi-pins anodes and a common tubular cathode. Though the laser power in convective cooled CO2 laser scales proportionally with the volumetric gas flow, it did not increase in this laser when the volumetric gas flow was increased by increasing the electrode separation keeping the flow velocity constant. The discharge voltage too remained almost unchanged with increase of the electrode separation. These observations are explained considering the electrical discharge being controlled by ionization instability. Laser materials processing applications often demand programming facilities for laser power modulation. A four-stage cascaded multilevel DC–DC converter-based high-frequency switch mode power supply has been developed to modulate the output power of the laser. Laser was operated up to 15 kW output power in four different modes viz. continuous wave mode, pulse periodic mode, single shot mode and processing velocity-dependent power mode with 1.2 kHz modulation bandwidth. We describe briefly the laser system, the SMPS, and the temporal behavior of laser beam. 相似文献
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We propose and demonstrate a simple approach to lower the thermal quenching
effect and improve the output power of Cr:LiSAF lasers, which is
accomplished by employing two laser rods. The resonator contains two laser
rods and is designed by using two ``X' folding cavities in cascade. A tunable
laser output of $\sim $ 180\,mW has been achieved with the pump of single-striped
laser diodes. Compared with lasers using single gain rod, the laser with
dual rods shows less severe thermal effect and increases the output by more
than two times. 相似文献
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高功率半导体激光器是固体激光器和光纤激光器的主要泵浦源。激光泵浦源性能的大幅提升直接促进了固体激光器、光纤激光器等激光器的发展。主要介绍了8xx nm和9xx nm系列半导体激光泵浦源的最新研究进展,8xx nm单管输出功率已达18.8 W@95 µm,巴条输出功率已达1.8 kW(QCW),9xx nm单管输出功率已达35 W@100 µm,巴条输出功率已达1.98 kW(QCW)。谱宽<1 nm的窄谱宽半导体激光器输出功率可达14 W。展望了未来半导体激光器泵浦源的发展趋势。 相似文献
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对掺钕光纤激光器输出功率沿光纤的分布以及不同光纤长度下抽运功率和输出功率沿光纤的分布进行了数值模拟.以808nm半导体激光器为抽运源,掺钕双包层保偏光纤为增益介质,对保偏光纤激光器进行了探索性的实验研究.分别就光纤不同弯曲形状和弯曲半径对激光器输出功率指标和偏振特性的影响进行了研究,实验中发现在1060nm和1092nm处有两个峰值.在波长1060nm处得到了7.35W的连续偏振激光输出,斜率效率为58.3%.
关键词:
激光技术
光纤激光器
掺钕保偏光纤
偏振 相似文献
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自激光器问世以来,激光在各领域的需求和应用非常广泛,而随着高功率激光装备输出功率不断提高,重量与体积已成为制约高功率激光装备应用与发展的关键问题之一。由于当前高功率激光装备仍将提高输出功率作为其发展目标,加之高功率激光装备结构功能复杂、能量转换效率低等特点,制约了高功率激光装备小型化、轻量化的实现。本文在介绍高功率激光装备的特点及其小型化、轻量化技术约束的基础上,综述了装备常用小型化、轻量化技术应用、新型高功率激光技术应用、提高能量转换效率及散热效率等高功率激光装备小型化、轻量化实现途径,以及各种技术途径在高功率激光装备中已有的应用。根据高功率激光装备现状及特点,其在小型化、轻量化方面具有很大的发展空间及应用前景。 相似文献
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