采用实时动态反馈技术,对三角波电流驱动DFB半导体激光器调频非线线性调频DFB半导体激光器的非线性矫正技术研究II性进行了矫正,明显降低了DFB半导体激光器调频过程中产生的非线性。关键词:DFB激光器,线性调频激光测距,调频非线性AbstractIIIAbstractLaserrangingisanimportantpartofmodernmeasurementtechnology.Comparedwiththetradit...
关键词:分布反馈光纤激光器,波长解调,非平衡马赫曾德干涉仪,相位载波法, 气体吸收谱 山东大学硕士学位论文 ABSTRACT Sincethe1990s,asoneofimportantdevelopment inthefieldoffiberlasers,the Distributedfeedbackfiber laser(DFB-FL)has been widely usedin optical fiber communicationandfiber sensing,especially in fiber-...
Analysis of Assistant Gas Flow Field and Structure Improvement of Supersonic Nozzle in Laser Cutting 激光切割中的超声速喷嘴辅助气体流场分析与结构改进 13. cutter bar, hay for tractor mounting 拖拉机用干草切割机切割器 14. A device or machine that cuts. 切割机切割的器具或机器 15. A microtome...
The principle of laser oxygen measurement is: An infrared laser on one side of the transmitter is emitted to a receiver on the opposite side. The measurement technique is based on the difference of the absorption of light by gas molecules. Most gases only absorb light of specific wavelength, ...
fixed cold Water trough Diameter-testing laser gauge Single Layer Cooling movable trough Coiling and wrapping machine Horizontal Tension accumulate stand PLC control Dual Wheel Traction Can be optional for motorized pay-off rack,high frequency sparker,etc.The concrete configuration can...
Traditional methods of oxygen content measurement: It includes copper ammonia solution absorption method, fuel cell method, paramagnetic method, zirconium oxide concentration potential method and laser method, etc. The principle and advantages and disadvantages of the method are summarized as follows: ...
The main content of this thesis are as follows: (1) A brief introduction of the structure and working principle of the studied combined grating DFB surface-emitting laser. (2) An introduction of the theory and implement of time-domain traveling-wave method based semiconductor laser solver, ...
goodideatodetectthepoisonousgasusingQCLdetectionsystembecauseofitshighresolution,highsensitivityandselectivity.Keywords:gassensing;systemcharacteristics;quantumcascadelaserCLCmumber:TH744Documentcode:AArt~deID:1007—2276(2011)11—2147—06脉冲式DFB中红外量子级联激光器的气体检测系统王玲芳,温志渝(重庆大学新型微纳...
现有的商用表面发射激光器主要是垂直腔表面发射激光器即VCSEL(vertical-cavitysurface-emittinglaser),虽然VCSEL已经在数据通信等领域得到大量应用,但是其因为有短腔长这个天生的劣势,因此单个器件输出功率并不是很高。而利用2阶分布反馈式布拉格光栅作为输出耦合器的水平腔表面发射激光器即拥有上述表面发射器件的优点,又克服...