Simulation of a Passively Modelocked All-Fiber - Joseph Shoer一个被动锁模光纤-约瑟夫澡仿真.ppt
《Simulation of a Passively Modelocked All-Fiber - Joseph Shoer一个被动锁模光纤-约瑟夫澡仿真.ppt》由会员分享,可在线阅读,更多相关《Simulation of a Passively Modelocked All-Fiber - Joseph Shoer一个被动锁模光纤-约瑟夫澡仿真.ppt(35页珍藏版)》请在三一文库上搜索。
1、Simulation of a Passively Modelocked All-Fiber Laser with Nonlinear Optical Loop Mirror,Joseph Shoer 06 Strait Lab,Solitons,Direction of propagation,Left: autocorrelation of sech2 t Propagates without changing shape Could be used for long-distance data transmission,Intensity,Distance,All Fiber Laser
2、,Light from,Nd:YAG,Pump Laser,Output,Nonlinear Optical Loop Mirror,Er/Yb,51.3%,48.7%,90%,10%,Polarization Controller,Faraday isolator,Polarization Controller,Power Transfer Curves,Transmission Model,Different PTC at each point Contours indicate light transmission through NOLM (value of PTC at zero i
3、nput) as a function of NOLM polarization controller settings Bright shading indicates positive PTC slope at low input Modelocking occurs at highest low-power slope,Transmission Model,Different PTC at each point Contours indicate light transmission through NOLM (value of PTC at zero input) as a funct
4、ion of NOLM polarization controller settings Bright shading indicates positive PTC slope at low input Modelocking occurs at highest low-power slope,Experimental Autocorrelations,Experimental Scope Trace,Simulation Goals,Model all pulse-shaping mechanisms over many round trips of the laser cavity NOL
5、M Standard fiber Er/Yb gain fiber Model polarization dependence of NOLM (duplicate earlier model) Duplicate lab results?,Gain,Fiber,NOLM,Pulse Shaping: Fibers,Time delay,Distance of propagation,Solving Maxwells Equations in optical fibers yields the nonlinear Schrdinger equation (NLSE): The NLSE can
6、 be solved numerically Ordinary first-order solitons maintain their shape as they propagate along a fiber Other input pulses experience variations in shape,Pulse Shaping: Fibers,Time delay,Distance of propagation,Time delay,|E|2,Time delay,|E|2,Pulse Shaping: NOLM,Pulse edge,Pulse peak,10 round trip
7、s,50 round trips,Pulse Shaping: Laser Gain,Pulses gain energy as they pass through the Er/Yb-doped fiber Gain must balance loss in steady state Gain saturation: intensity-dependent gain? Not expected to have an effect Gain depletion: time-dependent gain? Not expected to have an effect Amplified spon
8、taneous emission (ASE): background lasing?,Calculate PTC,NOLM (apply PTC),Standard Fiber (NLSE),Er/Yb Fiber (NLSE + gain),Inject seed pulse,Output pulse after i round trips,Repeat n times,The Simulator,Adjust gain,Power Transfer Curve is determined by polarization controller settings Absorbs nonline
9、arity of NOLM fiber Uses transmission model (Aubryn Murray 05) fit from laboratory data,Calculate PTC,NOLM (apply PTC),Standard Fiber (NLSE),Er/Yb Fiber (NLSE + gain),Inject seed pulse,Output pulse after i round trips,Repeat n times,The Simulator,Adjust gain,In the lab, pulses are initiated by an ac
10、oustic noise burst The model uses E(0, t) = sech(t) a soliton as a standard input profile This is for convenience with enough CPU power, we could take any input and it should evolve into the same steady state result,Calculate PTC,NOLM (apply PTC),Standard Fiber (NLSE),Er/Yb Fiber (NLSE + gain),Injec
11、t seed pulse,Output pulse after i round trips,Repeat n times,The Simulator,Adjust gain,2 m of Er/Yb-doped fiber is simulated by solving the Nonlinear Schrdinger Equation with a gain term The program uses an adaptive algorithm to settle on a working gain parameter Dispersion and self-phase modulation
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- Simulation of Passively Modelocked All-Fiber Joseph Shoer一个被动锁模光纤-约瑟夫澡仿真 All Fiber Shoer 一个 被动 光纤 约瑟夫
链接地址:https://www.31doc.com/p-2294837.html