(* hB4.tMgZ
Demo for program"RP Fiber Power": thulium-doped fiber laser, el<nY"c
pumped at 790 nm. Across-relaxation process allows for efficient c1f6RCu$b
population of theupper laser level. SE1 tlP
*) !(* *)注释语句 62q-7nV
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diagram shown: 1,2,3,4,5 !指定输出图表 .0
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; 1: "Powersvs. Position" !分号是注释;光纤长度对功率的影响 R_&>iu'[
; 2:"Variation of the Pump Power" !泵浦光功率变化对信号输出功率的影响 3`y:W9!u
; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 f\JyN@w+
; 4:"Transverse Profiles" !横向分布,横坐标为半径位置 S_atEmQ
; 5:"Transition Cross-sections" !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 6r`g+Js/
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include"Units.inc" !读取“Units.inc”文件中内容 H D>{UU?
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include"Tm-silicate.inc" !读取光谱数据 RL%{VE
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; Basic fiberparameters: !定义基本光纤参数 gDrqs>8
L_f := 4 { fiberlength } !光纤长度 f{J7a1 `_
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 )8_0 d)
r_co := 6 um { coreradius } !纤芯半径 ,DjZDw
N_Tm := 100e24 { Tmdoping concentration } !纤芯Tm离子掺杂浓度 0WFZx
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; Parameters of thechannels: !定义光信道 hH\(>4l
l_p := 790 nm {pump wavelength } !泵浦光波长790nm A,osrv
dir_p := forward {pump direction (forward or backward) } !前向泵浦 N=kACEo
P_pump_in := 5 {input pump power } !输入泵浦功率5W BBDOjhik
w_p := 50 um {radius of pump cladding } !包层泵浦相应的半径 50um 5D#*lMSP"'
I_p(r) := (r <=w_p) { pump intensity profile } !泵浦光强度分布 >3JOQ;:d8
loss_p := 0 {parasitic losses of pump wave } !泵浦光寄生损耗为0 ifkA3]
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l_s := 1940 nm {signal wavelength } !信号光波长1940nm
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w_s := 7 um !信号光的半径 $T6<9cB@
I_s(r) := exp(-2 *(r / w_s)^2) !信号光的高斯强度分布 al2v1.Y}
loss_s := 0 !信号光寄生损耗为0 )\e_I\-
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R_oc := 0.70 {output coupler reflectivity (right side) } !输出耦合反射率 =F`h2 A;a
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; Function for defining themodel: !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 5segzaI
calc REw3>/=
begin &45.*l|mo
global allow all; !声明全局变量 NO&OuiN
set_fiber(L_f, No_z_steps, ''); !光纤参数 t :_7O7
add_ring(r_co, N_Tm); O;XF'r_
def_ionsystem(); !光谱数据函数 #X)s=Y&5!T
pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p); !泵浦光信道 *6h.#$\
signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward); !前向信号光信道 mb#)w`<
signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward); !后向信号光信道 \ l:n
set_R(signal_fw, 1, R_oc); !设置反射率函数 BdceINI
finish_fiber(); 4]cOTXk9C
end; @U&|38
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; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 dO=<3W
show "Outputpowers:" !输出字符串Output powers: 2XE4w# [j
show"pump: ", P_out(pump):d3:"W" !输出字符串pump:和计算值(格式为3个有效数字,单位W) \nLO.,
show"signal: ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) TiOvrp7B
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; ------------- :{sX8U%
diagram 1: !输出图表1 ~6OdPD
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"Powers vs.Position" !图表名称 r4-r
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x: 0, L_f !命令x: 定义x坐标范围 (YR1ML3N
"position infiber (m)", @x !x轴标签;@x 指示这些字符串沿坐标轴放置 YrdK@I
y: 0, 15 !命令y: 定义y坐标范围 !,\]> c
y2: 0, 100 !命令y2: 定义第二个y坐标范围 H1X6f7`
frame !frame改变坐标系的设置 <"t >!I
legpos 600, 500 !图行在图表窗口中的位置(相对于左上角而言) 8mV35A7l
hx !平行于x方向网格 V7&