共查询到20条相似文献,搜索用时 140 毫秒
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复合腔电光调Q微晶片激光器是一种集成化的固体激光器,具有体积小、基横模、单纵模、线偏振运转,输出脉冲重复频率高,脉宽窄的优点,是高重复频率、高光束质量的主振荡功率放大器(MOPA)激光系统的理想种子源。进行了低压驱动复合腔电光调Q微晶片激光器的实验与理论研究。根据理论分析,增加电光晶体长度和提高端面反射率可减小标准具透射谱半宽度,进而降低驱动电压。设计了两套激光器实验方案。实验中激光增益介质和电光晶体分别选用Nd:YVO4和LiTaO3,谐振腔尺寸小于3 mm×3 mm×2.5 mm。方案1主要研究增加电光晶体长度后的激光器输出特性,在抽运功率184 mW,240 V驱动电压下,可实现300 kHz激光脉冲输出,脉冲宽度10 ns,峰值功率9.4 W。在方案2中,通过进一步提高端面反射率,在短时间内可输出1 MHz脉冲。 相似文献
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半导体激光器的稳定性取决于驱动电源.结合消光比测试仪要求,设计了基于脉宽调制芯片UC3842的实用半导体激光器驱动电源.该驱动电源适用于功率较小的半导体激光器,输出占空比和频率可调的驱动信号,使之输出一定频率的调制光信号,实现了慢启动、高频及过压过流等保护功能,能使半导体激光器在室温下安全工作.通过实验结果分析,证明了方案的可行性,满足测试仪的要求. 相似文献
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用国产雪崩管串驱动四电极触发管的高压开关从简易脉冲双锁模激光器中选出了稳定的亚毫微秒激光脉冲.
本文介绍了高压开关及同步电路的制作及实验情况。 相似文献
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用国产雷崩管中驱动四电极触发管的高压开关从简易脉冲双镇模激光器中选出了稳定的亚毫微秒激光脉冲。 本文介绍了高压开关及同步电路的制作及实验情况。 相似文献
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半导体激光器又称激光二极管(LD)。半导体激光器驱动电路的设计对于激光器输出特性有重要影响,是决定半导体激光器系统稳定性的重要技术。激光二极管管芯温度的漂移以及其注入电流的变化都会对激光器出射频率产生变差,最终导致跳模或多模工作。为了确保半导体激光器的激光输出质量,本文研究设计了一款高性能的激光驱动电路,主要包括电源电路,恒流源电路,保护电路与及延时缓冲电路四部分。在Multisim软件中进行了电路仿真,并与实际电路中的结果图做了比较,最后应用日本某之名公司的光子强度检测器进行了实验测试与分析。实验结果表明该驱动电路设计满足要求,对后续研究具有重要意义。 相似文献
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An experimental way for the thermal characterization of semiconductor lasers based on I-V method under pulse driving conditions has been developed, with which the thermal characteristics of strain compensated 1.3μm InAsP/InGaAsP ridge waveguide MQW laser chips have been investigated. The results show that, by measuring and analyzing the I-V characteristics under appropriate pulse driving conditions at different heat sink temperatures, the thermal resistance of the laser diodes could be easily deduced. The driving current and junction voltage waveforms of the laser chips under different pulse driving conditions are also discussed. 相似文献
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An experimental way to analyze the thermal characterization of semiconductor lasers based on spectroscopy method under pulse driving conditions has been developed. By using this way the thermal characteristics of strain compensated 1.3μm InAsP/InGaAsP ridge waveguide MQW laser diodes have been investigated. Results show that by measuring and analyzing the lasing spectra under appropriate driving parameters and temperature ranges, the thermal resistance of the laser diodes could be deduced easily. A higher thermal resistance of 640K/W has been measured on a narrow ridge laser chip without soldering. Other thermal and spectral properties of the lasers have also been measured and discussed. 相似文献
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An experimental way to analyze the thermal characteriztion of semiconductor lasers based on spectroscopy method under pulse driving conditions has been developed,By using this way the thermal characteristicss of strain compensated 1.3 μm InAsP/InGaAsP ridge waveguide MQW laser diodes have been investigated.Results shovw that by measuring and analyzing the lasing spectra under appropriate driving parameters and temperature ranges,the thermal resistance of the laser diodes could be deduced easily,A higer thermal resistance of 640 K/W has been measured on a narrow ridge laser chip without soldering.Other thermal and spectral properties of the laser have also been measured and discussed. 相似文献
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为了减小时分复用无源光网络(TDM-PON)上行信号光波长的飘移,基于TDM-PON上行信号光功率均衡器架构,采用单模激光注入锁定光网络单元(ONU)法布里-珀罗(F-P)激光器(LD)方法,研究了F-P LD输出光波长的锁模特性,包括锁模的范围、驱动电流对锁模特性的影响、锁模前后温度变化引起F-P LD光波长变化情况等。结果表明,当驱动电流为9mA时,F-P LD可被锁模的波长范围为0.38nm,大于ONU上行光波长因环境温度变化5℃而产生的波长位移量0.25nm,F-P LD被锁模可使ONU上行信号的光波长相同且稳定,降低光功率均衡后的噪声。 相似文献
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《Quantum Electronics, IEEE Journal of》2009,45(9):1074-1083