简介:ThecharacteristicsofspecialapodizedfiberBragggrating(FBG)inflat-toppass-bandasreflectivityfilterarepresented.ThisspecialapodizedFBGwasdesignedbytheparticleswarmoptimizationalgorithm.ComparedwithconventionalapodizedFBG,thespecialapodizedFBGpresentedwasmorerobustintheflat-toppass-bandcharacteristicevenifthestrengthofgratingisveryweek.Thistechnologyisveryinterestingindesigningthefilterforwavelengthdivisionmultiplexingsystem.
简介:扁平的回答有40隧道和0.8nm(100GHz)的基于硅石的穿的波导栅栏(美国线规)隧道间距被设计了并且制作了在输入波导的结束使用multimode干涉仪(MMI)。MMI的合适的宽度理论上用横梁繁殖方法(BPM)被优化。有16渭m宽度MMI的一个美国线规试验性地被制作。测量结果证明3dB带宽是0.62nm,插入损失()从5.2dB到7.5dB,并且串音是不到鈥?0dB。3dB带宽,隧道数字和AWG的隧道间距与模拟价值同意很好。CLC数字TN253文件代码A由中国的国家自然科学基础支持了(号码60477035,号码60507006)并且科技鈥?的部73鈥?计划(没有。G2000036602)
简介:Threekindsof650nmAlGaInPresonantcavitylight-emittingdiodes(RCLEDs)arefabricatedbymetalorganicchemicalvapordeposition(MOCVD)withdifferentnumbersofpairsoftopdistributedBraggreflectors(DBRs),whichare15,10and5,respectively.Bycomparingthefullwidthathalfmaximum(FWHM),lightpowerandtheangularfar-fieldemissionofthedevices,thedevicewith15pairsoftopDBRsshowsthebestperformance.ItsFWHMis13.4nmandthelightpoweris0.63mWatadrivingcurrentof30mA.