(* Wg[`H=)Q
Demo for program"RP Fiber Power": thulium-doped fiber laser, =k'dbcfO$9
pumped at 790 nm. Across-relaxation process allows for efficient nT>?}/S
population of theupper laser level. Lv_>cFJ}[
*) !(* *)注释语句 bke 1 F
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0ode&dB
diagram shown: 1,2,3,4,5 !指定输出图表 C}!|K0t?
; 1: "Powersvs. Position" !分号是注释;光纤长度对功率的影响 |
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; 2:"Variation of the Pump Power" !泵浦光功率变化对信号输出功率的影响 5XhV+t
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; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 <ANKoPNie
; 4:"Transverse Profiles" !横向分布,横坐标为半径位置 ZA!vxQ?P,
; 5:"Transition Cross-sections" !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 Na=q(OKN
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include"Units.inc" !读取“Units.inc”文件中内容 ,=mn*
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include"Tm-silicate.inc" !读取光谱数据 dCHU* 7DS
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; Basic fiberparameters: !定义基本光纤参数 Gqs8$[o
L_f := 4 { fiberlength } !光纤长度 |y]#-T?)t
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 Cc^t&Eg
r_co := 6 um { coreradius } !纤芯半径 sB6UlX;b:
N_Tm := 100e24 { Tmdoping concentration } !纤芯Tm离子掺杂浓度 ISl'g'o
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; Parameters of thechannels: !定义光信道 AOTI&v
l_p := 790 nm {pump wavelength } !泵浦光波长790nm |h#mv~cF
dir_p := forward {pump direction (forward or backward) } !前向泵浦 h\1_$ac
P_pump_in := 5 {input pump power } !输入泵浦功率5W @g{=f55
w_p := 50 um {radius of pump cladding } !包层泵浦相应的半径 50um ?D.]c;PR
I_p(r) := (r <=w_p) { pump intensity profile } !泵浦光强度分布 DI*xf
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loss_p := 0 {parasitic losses of pump wave } !泵浦光寄生损耗为0 03,+uf
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l_s := 1940 nm {signal wavelength } !信号光波长1940nm P6X 4m(t
w_s := 7 um !信号光的半径 9gFC]UVWh
I_s(r) := exp(-2 *(r / w_s)^2) !信号光的高斯强度分布 a9"Gg}h\
loss_s := 0 !信号光寄生损耗为0 t0wLj}"U
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R_oc := 0.70 {output coupler reflectivity (right side) } !输出耦合反射率 E_xpq
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; Function for defining themodel: !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 jtZ@`io
calc /_ LUys/0
begin )q#b^( v
global allow all; !声明全局变量 @]A4{
set_fiber(L_f, No_z_steps, ''); !光纤参数 I3SLR
add_ring(r_co, N_Tm); K$rH{dUM
def_ionsystem(); !光谱数据函数 nGRF<2!
pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p); !泵浦光信道 }C)
signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward); !前向信号光信道 %N!Y}$y
signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward); !后向信号光信道 =Y89X6
set_R(signal_fw, 1, R_oc); !设置反射率函数 g6N{Z e Wg
finish_fiber(); 7)[4|I
end; qD%Jf4.0j
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; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 &359tG0@P
show "Outputpowers:" !输出字符串Output powers: B=9|g1e
show"pump: ", P_out(pump):d3:"W" !输出字符串pump:和计算值(格式为3个有效数字,单位W) Fm*O&6W\@A
show"signal: ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) ]92@&J0w
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; ------------- )u<sEF
diagram 1: !输出图表1 iA=9Lel
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"Powers vs.Position" !图表名称 a?@j`@]ZR~
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x: 0, L_f !命令x: 定义x坐标范围 :U?Kwv8 s
"position infiber (m)", @x !x轴标签;@x 指示这些字符串沿坐标轴放置 '*W/Bett
y: 0, 15 !命令y: 定义y坐标范围 V"
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y2: 0, 100 !命令y2: 定义第二个y坐标范围 ]{dg"J
frame !frame改变坐标系的设置 mw.9cDf
legpos 600, 500 !图行在图表窗口中的位置(相对于左上角而言) " >;},$
hx !平行于x方向网格 MA"DP7e?v
hy !平行于y方向网格 )V+;7j<"D
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f: P(pump, x), !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 ~GMlnA]6
color = red, !图形颜色 wz;IKdk[
width = 3, !width线条宽度 )x#^fN~ 7`
"pump" !相应的文本字符串标签 i9W@$I,f
f: P(signal_fw, x), !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 )j!22tlL
color = blue, Q-(twh
width = 3, N3i}>Q)B
"fw signal" l3-;z)SgH
f: P(signal_bw, x), !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 )9J&M