(* m(Cn'@i`"0
Demo for program"RP Fiber Power": thulium-doped fiber laser, H5Rn.n( |
pumped at 790 nm. Across-relaxation process allows for efficient g|PVOY+|^
population of theupper laser level. ~mtL\!vaM
*) !(* *)注释语句 xOjCF&W
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diagram shown: 1,2,3,4,5 !指定输出图表 MdWT[
; 1: "Powersvs. Position" !分号是注释;光纤长度对功率的影响 ".qh]RVjV
; 2:"Variation of the Pump Power" !泵浦光功率变化对信号输出功率的影响 qPpC )6-Q
; 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 EY(@R2~#J
; 4:"Transverse Profiles" !横向分布,横坐标为半径位置 ti'a^(
; 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 X.,1SYG[
\)ac,i@fy
include"Units.inc" !读取“Units.inc”文件中内容 \HDRr*KO
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include"Tm-silicate.inc" !读取光谱数据 gUCv#:
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; Basic fiberparameters: !定义基本光纤参数 #Vanw !
L_f := 4 { fiberlength } !光纤长度 r}P{opn$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 Pb.-Z@
r_co := 6 um { coreradius } !纤芯半径 Z8Fbx+~"
N_Tm := 100e24 { Tmdoping concentration } !纤芯Tm离子掺杂浓度 ">kfX1LT
er}/~@JJ
; Parameters of thechannels: !定义光信道
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l_p := 790 nm {pump wavelength } !泵浦光波长790nm K ^1bR(a
dir_p := forward {pump direction (forward or backward) } !前向泵浦 ~)}npS;
P_pump_in := 5 {input pump power } !输入泵浦功率5W z@cL<.0CE
w_p := 50 um {radius of pump cladding } !包层泵浦相应的半径 50um 38%]GQ
I_p(r) := (r <=w_p) { pump intensity profile } !泵浦光强度分布 ~l-Q0wg
loss_p := 0 {parasitic losses of pump wave } !泵浦光寄生损耗为0 fw_V'l#\
8@!/%"Kt2
l_s := 1940 nm {signal wavelength } !信号光波长1940nm jd=k[Yqr
w_s := 7 um !信号光的半径 R{3f5**0
I_s(r) := exp(-2 *(r / w_s)^2) !信号光的高斯强度分布 `7Ni bZX0
loss_s := 0 !信号光寄生损耗为0 LZyUlz
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R_oc := 0.70 {output coupler reflectivity (right side) } !输出耦合反射率 bzmT.!
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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 ]]+wDhxH
calc K!k,]90Ko
begin r 9@W8](\
global allow all; !声明全局变量 u|=_!$8
set_fiber(L_f, No_z_steps, ''); !光纤参数 ZYrXav<
add_ring(r_co, N_Tm); rU5gQq;
def_ionsystem(); !光谱数据函数 B[Uvj~g
pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p); !泵浦光信道 F`U%xn,
signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward); !前向信号光信道 ^l
~i >:V
signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward); !后向信号光信道 R1X9
set_R(signal_fw, 1, R_oc); !设置反射率函数 f>5{SoM
finish_fiber(); 1Af~6jz
end; j"/i+r{"E
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; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 :=^JHE{
show "Outputpowers:" !输出字符串Output powers: ]~ )FMWQz-
show"pump: ", P_out(pump):d3:"W" !输出字符串pump:和计算值(格式为3个有效数字,单位W) zO2Z\E'%.
show"signal: ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) r<Ll>R
ge[f/"u
JMpjiB,A}
; ------------- YQiTx)_
diagram 1: !输出图表1 mTW0_!.
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"Powers vs.Position" !图表名称 5Y"lr Y38
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x: 0, L_f !命令x: 定义x坐标范围 xRJv_=dT
"position infiber (m)", @x !x轴标签;@x 指示这些字符串沿坐标轴放置 Txfu%'2)e
y: 0, 15 !命令y: 定义y坐标范围 WtFv"$V
y2: 0, 100 !命令y2: 定义第二个y坐标范围 "MKgU[t
frame !frame改变坐标系的设置 q/?#+d
legpos 600, 500 !图行在图表窗口中的位置(相对于左上角而言) ;4Y@xS2M
hx !平行于x方向网格 `pE~M05
hy !平行于y方向网格 ;c_X
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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 8k]'P*9ulz
color = red, !图形颜色 'd^U!l
width = 3, !width线条宽度 r@H<@Vuc
"pump" !相应的文本字符串标签 (+38z)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 y|nMCkuX
color = blue, Xp{+){Iu
width = 3, b"t!nfgo
"fw signal" Ja|! fT
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 "CB*
color = blue, WsTbqR)W%
style = fdashed, T#Qn\8
width = 3, eRD?O
"bw signal" vL`wn=
A}FEM[2
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 OnC|9
yscale = 2, !第二个y轴的缩放比例 f:G Zb?Wyd
color = magenta, B8'" ^a^&-
width = 3, :z56!qU
style = fdashed, KO<Yc`Fs
"n2 (%, right scale)" }L{en
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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 9Y- Sqk+
yscale = 2, =GTltFqI1
color = red, 4T`u?T]
width = 3, @3K)VjY7
style = fdashed, bBc<yaN
"n3 (%, right scale)" p}hOkx4R\
p-GlGEt_X
*T*=~Y4kE
; ------------- @H"~/ m_o
diagram 2: !输出图表2 3 ~0Z.!O
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"Variation ofthe Pump Power" Pq>r|/~_
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x: 0, 10 ~&[Wqn@MZ
"pump inputpower (W)", @x .vj`[?T
y: 0, 10 }a,j1r_Hl&
y2: 0, 100 }xn\.M:ic
frame + O=wKsGD
hx 7JD
jJQy
hy ~EG`[cv
legpos 150, 150 I#zrz3WU
fD
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 x1W<r)A )r
step = 5, -~~"}u
color = blue, ~&4Hc%*IB
width = 3, Kgbgp mW
"signal output power (W, leftscale)", !相应的文本字符串标签 jwgXq(
finish set_P_in(pump, P_pump_in) )d!,,o
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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 fHCLsI
yscale = 2, ,o& &d