共查询到20条相似文献,搜索用时 734 毫秒
1.
2.
陈德麒 《中国新技术新产品》2008,(8):15-16
近年来,半导体激光阵列发展迅猛,但由于输出光束质量差,影响了其直接应用。因此,改善大功率半导体激光器的光束质量成为各国关注的焦点。本文在介绍光纤耦合技术的基础上,对大功率半导体激光器面阵光束整形方案进行了分析和研究。 相似文献
3.
杨子斌 《中国新技术新产品》2012,(24):150-150
随着光纤激光器技术的飞速发展,作为光纤激光器泵浦源的高功率,高亮度的大功率半导体激光器光纤耦合模块越来越受到人们的关注。提高光纤耦合效率和光纤耦合模块的可靠性,有效控制大功率半导体激光器光纤耦合模块的温度成为人们关注的重点。 相似文献
4.
利用光纤和调制半导体激光的准直方法 总被引:3,自引:0,他引:3
本提出了一种新的激光光纤准直方法。利用光传播的平行性和直线性,光学准直技术被用于精密地建立几何参数的测量基准,在这些应用中,光束、处理电路的漂移、杂散光是影响测量精度的主要因素。为了消除这些影响,本利用调制半导体激光技术和光纤技术形成准直光束,四象限探测器进行探测,相敏检波技术对光电调制信号进行解调,所有的信号共享同一信号处理信道,且光束的调制频率远离杂散光的频率范围,激光光束漂移杂散光、电路漂移被抑制,在1m范围获得了0.3μm的准直精度。 相似文献
5.
6.
保偏光纤偏振轴方位图象特征分析 总被引:4,自引:0,他引:4
偏振轴方位的精密探测和对准是保偏光纤应用中的关键技术。文中提出了一种利用摄像显微镜观测熊猫光纤偏振轴方位的横向图象处理方法,并利用光线追迹方法对保偏光纤在横向准直均匀光束照明情况下偏振方位图象的构形机理及特征信息提取方法进行了分析和讨论。计算机仿真拟合结果和实验观测结果相吻合。 相似文献
7.
8.
光纤准直器自动调试装配系统的设计 总被引:5,自引:0,他引:5
研制了一种光纤准直器调试装配设备——光纤准直器自动调试装配系统。利用光电探测器来探测光束光斑直径,将数据反馈给执行机构,执行机构再控制光纤头运动到插损最小点,然后封装成光纤准直器。主要讲述了该方案的理论依据和推导过程,并利用试产的准直器检测数据证实该设备的有效性。 相似文献
9.
平面镜半导体光束整形的设计优化与光纤耦合 总被引:1,自引:0,他引:1
本文在光纤耦合理论分析的基础上,采用平面镜反射整形方法对半导体准直光束进行重排,提出了应用于半导体光束整形的整形器结构表达式.针对慢轴发散角较大引起整形次数增加和多次反射易损耗的特点,分析并优化平面镜的结构参数,设计了整形次数为13次的平面整形器,使得半导体激光器快、慢轴方向的光束实现光参数积均衡.通过对整个光学系统的模拟和实验,表明采用该方法能够实现条阵半导体激光耦合进入芯径200μm、数值孔径为0.22的光纤中,耦合效率接近50%. 相似文献
10.
为了研究光纤与宽波导光栅的有效耦合,基于高斯光束与波导光栅的光耦合理论,以30μm宽波导光栅为研究对象,利用矩阵光学和高斯光束理论分析和设计了一种扩束光纤,并通过分析其耦合损耗,建立了扩束光纤与波导光栅耦合模型.优化所设计扩束光纤的结构参数后,得到束腰半径为10.8μm的输出光束.最后分析了扩束光纤的结构容差,并讨论了所设计扩束光纤的输出光束、单模光纤的输出光束以及束腰半径为16 μm的自由空间高斯光束各自在光栅表面的位置变化对光栅耦合效率的影响.可知扩束光纤输出的光束与单模光纤输出的光束相比具有较大的位置容差,与束腰半径为16 μm的自由空间高斯光束相比,光耦合效率基本相同. 相似文献
11.
We report efficient amplification of an external cavity diode laser in the 1.06-mum range. The diode laser radiation is coupled into a Nd-doped silica fiber. The fiber is pumped by a diode array with up to 6.15 W of power. After a single pass of the seed radiation through the fiber amplifier, we observe up to 1.74 W of single-mode, narrow-linewidth laser radiation that is tunable over a relatively wide range of 1.060-1.067 mum. The output from our amplifier has the same spectral characteristics as the seed beam. 相似文献
12.
Frequency-narrowed diode array bar 总被引:1,自引:0,他引:1
We describe a method to frequency narrow multielement high-power diode bars. Using a commercial 60-W, 49-element, 1-cm-long diode array bar at 795 nm running at 45 W, we narrow the linewidth from 1000 to 64 GHz with only a loss of 33% in output power. The resulting laser light is well suited for spin-exchange optical pumping of noble gas nuclei. 相似文献
13.
Efficient operation of a Nd:YAG laser on the low-gain 1123-nm transition by end pumping with the reshaped output from a 7-W diode bar is reported. Using a simple standing-wave laser configuration and pumping with 5.6 W of incident power yielded a laser output power of 1.7 W in a near-diffraction-limited TEM00 mode with a beam quality factor of M2 < or approximately equal to 1.1. A unidirectional single-frequency ring laser was also constructed, yielding 180 mW of single-frequency output. The prospects for further increase in power by optimization of the resonator design are discussed. 相似文献
14.
A method for measuring the length of an optical fiber by use of an optical fiber ring laser pulse source is proposed and demonstrated. The key element of the optical fiber ring laser is a gain-switched Fabry-Perot laser diode operated in a self-injection seeding scheme. This method is especially suitable for measuring a medium or long fiber, and a resolution of 0.1 m is experimentally achieved. The measurement is implemented by accurately determining the pulse frequency that can maximize the output power of the fiber ring laser. The measurement results depend only on the refractive index of the fiber corresponding to this single wavelength, instead of the group index of the fiber, which represents a great advantage over both optical time-domain reflectometry and optical low-coherence reflectometry methods. 相似文献
15.
带宽〉40nm的980nmLD泵浦掺Er^3+光纤放大器模块 总被引:1,自引:0,他引:1
在国内首次用980nm激光二极管和参量优化Er3+/Al3+共掺杂光纤研制成光学带宽>40nm的光电一体化光纤放大器实用型模块样机。模块净增益25dB,饱和输出功率0dBm,最大输出功率8dBm,噪声系数<5dB,可供波分复用光纤通信系统和光孤子传输实验试用。 相似文献
16.
为了测试太阳能电池温度,提出了光纤测量太阳能电池温度的方法。在分析温度与太阳能电池输出功率关系的基础上,利用光纤反StokesRaman背向散射温度效应建立了光纤太阳能电池测温系统。系统中波长为905nm的激光器产生的激光,经过波分复用器、光纤传到太阳能电池中,其反射光经过光纤时受到温度调制,再通过波分复用器照射到光电探测器上,通过光电探测器检测出电池的温度。应用该系统测试出来的温度比间接测量的温度精度提高了2.5%,用该温度修正太阳能电池的输出功率,克服了温度造成的功率损失。结果表明,此方法将太阳能电池的输出功率提高了4%,为太阳能的广泛应用提供了基础。 相似文献
17.
Gain factor and output performance of erbium-praseodymium codoped ZBLAN double-clad fiber lasers at 2.7 microm with different pumping designs were calculated and analyzed. Single-end backward pumping with a highly reflective mirror butted against one fiber end and dual-end pumping with Fresnel reflections from both fiber ends were found to be the most efficient pumping designs. Ten-watt-level Er/Pr:ZBLAN fiber lasers proved to be achievable with recent diode laser and ZBLAN fiber technologies. Their corresponding optimum fiber lengths for different pumping configurations were determined. It was also found that fiber lasers with a flat evolution of gain factor can obtain the largest output power. Experimental results of 4 m and 12 m fiber lasers showed very good agreement with simulation results. 相似文献
18.
19.
We report on an efficient, narrow linewidth, two-stage fiber amplifier at 1014.8 nm based on Yb-doped double-clad fibers. The fibers are cooled to liquid-nitrogen temperatures in order to suppress absorption at the operating wavelength. We achieved output powers of up to 5.0 W at a linewidth of less than 3 MHz by seeding the amplifier with the radiation from an external cavity diode laser. 相似文献
20.
用射线法导出了两段式激光器的输出谱公式,分析了外腔式半导体激光器的输出光谱,计算了ECLD被调二极管模式的不同波长处振时的阈值,获得了ECLD模式的波长表达式,讨论了二极管靠近光栅的一面的反射率的波长特性对输出的影响。 相似文献