(* AONEUSxJ
Demo for program"RP Fiber Power": thulium-doped fiber laser, `{KdmWhW
pumped at 790 nm. Across-relaxation process allows for efficient 8NZQTRdH
population of theupper laser level. 8l.bT|#O
*) !(* *)注释语句 IgIM8"N
OA7YWk<K
diagram shown: 1,2,3,4,5 !指定输出图表 V?L8BRnV
; 1: "Powersvs. Position" !分号是注释;光纤长度对功率的影响 1agNwFd~
; 2:"Variation of the Pump Power" !泵浦光功率变化对信号输出功率的影响 0:iR=S
; 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 MD):g@
; 4:"Transverse Profiles" !横向分布,横坐标为半径位置 \; voBU
; 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 +^<s'
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include"Units.inc" !读取“Units.inc”文件中内容 <rihi:4K
\Ota~A
include"Tm-silicate.inc" !读取光谱数据 PyoIhe&ep
d=nv61]
; Basic fiberparameters: !定义基本光纤参数 $2E&~W %
L_f := 4 { fiberlength } !光纤长度 NNxzZ!q!
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 a.z)m}+
r_co := 6 um { coreradius } !纤芯半径 a$=He
N_Tm := 100e24 { Tmdoping concentration } !纤芯Tm离子掺杂浓度 1 2VSzIm
Y'^+ KU
; Parameters of thechannels: !定义光信道 F$j?}
l_p := 790 nm {pump wavelength } !泵浦光波长790nm ^O3i)GO
dir_p := forward {pump direction (forward or backward) } !前向泵浦 Et! 6i7`]
P_pump_in := 5 {input pump power } !输入泵浦功率5W ["_+~*
w_p := 50 um {radius of pump cladding } !包层泵浦相应的半径 50um ],~H3u=s3
I_p(r) := (r <=w_p) { pump intensity profile } !泵浦光强度分布 2C
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loss_p := 0 {parasitic losses of pump wave } !泵浦光寄生损耗为0 Xaw ~Hh)
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l_s := 1940 nm {signal wavelength } !信号光波长1940nm p:;`X!
w_s := 7 um !信号光的半径 [gDl<6a#4
I_s(r) := exp(-2 *(r / w_s)^2) !信号光的高斯强度分布 %M*2 j%6
loss_s := 0 !信号光寄生损耗为0 b%QcB[k[WB
|{ @BH
R_oc := 0.70 {output coupler reflectivity (right side) } !输出耦合反射率 Z8ds`KZM
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; Function for defining themodel: !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 r3NdE~OAi
calc {%oxzdPc
begin t2(vtxrt
global allow all; !声明全局变量 !%'"l{R
set_fiber(L_f, No_z_steps, ''); !光纤参数 P~*'/!@
add_ring(r_co, N_Tm); (nwp s
def_ionsystem(); !光谱数据函数 #O lPnP 2
pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p); !泵浦光信道 &Nw[J5-"k
signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward); !前向信号光信道 O+?vQ$z
signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward); !后向信号光信道 74=zLDDS
set_R(signal_fw, 1, R_oc); !设置反射率函数 4(dgunP
finish_fiber(); n%6ba77
end; xpp>5d
!
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; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 fXe$Ug|5a
show "Outputpowers:" !输出字符串Output powers: v,kvLjqt
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) f28bBuv1?
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) (]` rri*^
twox.@"U
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; ------------- FeNNzV=
diagram 1: !输出图表1 7]_zWx,r
RF= $SMTk
"Powers vs.Position" !图表名称 j[A:So
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x: 0, L_f !命令x: 定义x坐标范围 NX5$x/uz
"position infiber (m)", @x !x轴标签;@x 指示这些字符串沿坐标轴放置 "Hk7s+%
y: 0, 15 !命令y: 定义y坐标范围 :=*V i`
y2: 0, 100 !命令y2: 定义第二个y坐标范围 3RF`F
i
frame !frame改变坐标系的设置 J@OK"%12
legpos 600, 500 !图行在图表窗口中的位置(相对于左上角而言) g2?yT ?
hx !平行于x方向网格 k;Fxr%
hy !平行于y方向网格 0YC|;`J
"d`u#YmR
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 x!6<7s
color = red, !图形颜色 n1x"B>3
width = 3, !width线条宽度 y'!"GrbZ
"pump" !相应的文本字符串标签 p=m:^9/
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 <Uc
color = blue, ~9PZ/(
'
width = 3, 4Y{;%;-i
"fw signal" I_ AFHrj
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 91-[[<
color = blue, 8Wo!NG:V5
style = fdashed, dvM%" k
width = 3, mL-6+pJ@
"bw signal" H>Ucmd;ay
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f: 100 * n(x, 2), !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 &;sW4jnt
yscale = 2, !第二个y轴的缩放比例 hV+=hX<h
color = magenta, ~uV(/?o%
width = 3, \8g=
Ix
style = fdashed, MxH |yo[
"n2 (%, right scale)" I9dX\w}
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f: 100 * n(x, 3), !n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 >=:^N-a
yscale = 2, tyWDa$u,u
color = red, UmArl)R/
width = 3, T2n3g|4
style = fdashed, ;!C_}P
"n3 (%, right scale)" |MOz>1<a
2m"cK^
!
,0
; ------------- -$X4RS
diagram 2: !输出图表2 G8 q<)
, 6Jw
"Variation ofthe Pump Power" K9 ]zUew
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x: 0, 10 ^KnK
\
"pump inputpower (W)", @x d"n"A?nXh
y: 0, 10 ef)zf+o
y2: 0, 100 1*|/N}g)
frame 1Vx5tOq
hx [[pt~=0
hy IA{W-RRb
legpos 150, 150 >t<\zC|~w
"$aoI Xv
f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 T:Ovh.$
step = 5, hsT&c|
color = blue, A2;6Vz=z
width = 3, -SfU.XlZl
"signal output power (W, leftscale)", !相应的文本字符串标签 b dLi_k
finish set_P_in(pump, P_pump_in) L`e19I$
d S'J @e=#
f: (set_P_in(pump,x); 100 * n_av(2)), !改变泵浦信号功率对能级2上激活粒子占比的影响 NuOxEyC
yscale = 2, U82mO+}
step = 5, )0]U"Nf ho
color = magenta, #vhN$H :&q
width = 3, N'-[>w7vK2
"population of level 2 (%, rightscale)", znPh7{|<