(* :DXkAb2
Demo for program"RP Fiber Power": thulium-doped fiber laser, *]nha1!S
pumped at 790 nm. Across-relaxation process allows for efficient *6sB$E_y
population of theupper laser level. qAUqlSP5
*) !(* *)注释语句 @C k6s
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diagram shown: 1,2,3,4,5 !指定输出图表 }{[H@uhjH
; 1: "Powersvs. Position" !分号是注释;光纤长度对功率的影响 {a.{x+!5I-
; 2:"Variation of the Pump Power" !泵浦光功率变化对信号输出功率的影响 ~
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; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 {mY<R`Ee
; 4:"Transverse Profiles" !横向分布,横坐标为半径位置 _iLXs
; 5:"Transition Cross-sections" !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 VO] Jvf
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include"Units.inc" !读取“Units.inc”文件中内容 >*(4evU
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include"Tm-silicate.inc" !读取光谱数据 =unMgX]$
dd>|1'-]
; Basic fiberparameters: !定义基本光纤参数 Wp/!;
L_f := 4 { fiberlength } !光纤长度 )HNbWGu
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 zNofI$U
r_co := 6 um { coreradius } !纤芯半径 Vy.A`Hz
N_Tm := 100e24 { Tmdoping concentration } !纤芯Tm离子掺杂浓度 m3C&QdjRp
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; Parameters of thechannels: !定义光信道 ;n$j?n+|
l_p := 790 nm {pump wavelength } !泵浦光波长790nm fQi7e5
dir_p := forward {pump direction (forward or backward) } !前向泵浦 %Rj:r!XB:
P_pump_in := 5 {input pump power } !输入泵浦功率5W \Si@t{`O
w_p := 50 um {radius of pump cladding } !包层泵浦相应的半径 50um t_6sDr'.
I_p(r) := (r <=w_p) { pump intensity profile } !泵浦光强度分布 izsAn"v
loss_p := 0 {parasitic losses of pump wave } !泵浦光寄生损耗为0 !/znovoD
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l_s := 1940 nm {signal wavelength } !信号光波长1940nm O Ul+es
w_s := 7 um !信号光的半径 1dh_"/
I_s(r) := exp(-2 *(r / w_s)^2) !信号光的高斯强度分布 x tg3~/H
loss_s := 0 !信号光寄生损耗为0 ?vPw I
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R_oc := 0.70 {output coupler reflectivity (right side) } !输出耦合反射率 3Wxl7"!x m
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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 b)J(0,9`G"
calc O9wZx%<
begin ?6+GE_VZ
global allow all; !声明全局变量 Rcs7 'q5
set_fiber(L_f, No_z_steps, ''); !光纤参数 +6@".<
add_ring(r_co, N_Tm); 8fFURk
def_ionsystem(); !光谱数据函数 pj;cL]L
pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p); !泵浦光信道 AX}l~
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signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward); !前向信号光信道 9-[g/qrF
signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward); !后向信号光信道 ]^$&Ejpe#
set_R(signal_fw, 1, R_oc); !设置反射率函数 NX&mEz
finish_fiber(); "P\k_-a'
end; i`Fg kABw
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; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 oNY;z-QK
show "Outputpowers:" !输出字符串Output powers: vT"T*FKh:
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) ?&EPZq