(* d@Wze[M?0
Demo for program"RP Fiber Power": thulium-doped fiber laser, %qVD-Jln
pumped at 790 nm. Across-relaxation process allows for efficient yhnPS4DC
population of theupper laser level. (d .M} G
*) !(* *)注释语句 md/h\o&
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diagram shown: 1,2,3,4,5 !指定输出图表 !rZZ/M"i
; 1: "Powersvs. Position" !分号是注释;光纤长度对功率的影响 tq*6]q8c>
; 2:"Variation of the Pump Power" !泵浦光功率变化对信号输出功率的影响 :j32 :/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 '@^mesMG
; 4:"Transverse Profiles" !横向分布,横坐标为半径位置 q[. p(6:
; 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 LMp^]*)t
*
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include"Units.inc" !读取“Units.inc”文件中内容 D|vck1C5,
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include"Tm-silicate.inc" !读取光谱数据 od&wfwk(
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; Basic fiberparameters: !定义基本光纤参数 N{a=CaYi+
L_f := 4 { fiberlength } !光纤长度 [mG!-.ll
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 hw B9N
r_co := 6 um { coreradius } !纤芯半径 O`9vEovjs
N_Tm := 100e24 { Tmdoping concentration } !纤芯Tm离子掺杂浓度 @ykl:K%ke
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; Parameters of thechannels: !定义光信道 hSj@<#b>F
l_p := 790 nm {pump wavelength } !泵浦光波长790nm fUq
#mkq}
dir_p := forward {pump direction (forward or backward) } !前向泵浦 W*u$e8i7
P_pump_in := 5 {input pump power } !输入泵浦功率5W 'W&ewZH_h
w_p := 50 um {radius of pump cladding } !包层泵浦相应的半径 50um I 6L3M\+-
I_p(r) := (r <=w_p) { pump intensity profile } !泵浦光强度分布 e=[@HVr
loss_p := 0 {parasitic losses of pump wave } !泵浦光寄生损耗为0 ^--8
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l_s := 1940 nm {signal wavelength } !信号光波长1940nm 6R#igLm
w_s := 7 um !信号光的半径 60xL.Z
I_s(r) := exp(-2 *(r / w_s)^2) !信号光的高斯强度分布 $h
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loss_s := 0 !信号光寄生损耗为0 qtz~Y~h|>
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R_oc := 0.70 {output coupler reflectivity (right side) } !输出耦合反射率 AO(zl*4
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; Function for defining themodel: !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 +u`4@~D#
calc NBw{
begin gz Dfx&.0
global allow all; !声明全局变量 j=u)
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set_fiber(L_f, No_z_steps, ''); !光纤参数 xg'xuz$U
add_ring(r_co, N_Tm); IJ7wUZp"
def_ionsystem(); !光谱数据函数 Y3H5}4QD
pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p); !泵浦光信道 R I:kp.V
signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward); !前向信号光信道 Q $Sp'
signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward); !后向信号光信道 G4\|bwh
set_R(signal_fw, 1, R_oc); !设置反射率函数 5>VX]nE3!
finish_fiber(); {r#uD5NJ/
end; JOwu_%
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; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 qu;$I'Ul%
show "Outputpowers:" !输出字符串Output powers: [|\#cVWs
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) x+[ATZ([
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) >Udq{<]#r
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