[原创]RP Fiber Power仿真设计掺铥光纤激光器代码详解 [复制链接]

(* )bOBQbj  
Demo for program"RP Fiber Power": thulium-doped fiber laser, lEL78l.  
pumped at 790 nm. Across-relaxation process allows for efficient \~rl
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population of theupper laser level. dmrps+L  
*)            ！（*  *）注释语句 `<\}FS`'  
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diagram shown: 1,2,3,4,5  ！指定输出图表 -!qu"A:  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 z(RL<N%  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 iSK+GQ~  
; 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 wy1X\PJjH  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 X##1! ad
 
; 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 ^[:9fs  
EER`?Sa(  
include"Units.inc"         ！读取“Units.inc”文件中内容 M s9E@E  
%u{W7  
include"Tm-silicate.inc"    ！读取光谱数据 #eP LOR&q  
_K9VMczj  
; Basic fiberparameters:    ！定义基本光纤参数 gv15t'y9  
L_f := 4 { fiberlength }      ！光纤长度 -php6$|  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 UAS@R`?
cI  
r_co := 6 um { coreradius }                ！纤芯半径 T4e\0.If  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 B=L&bx  
.uo.N  
; Parameters of thechannels:                ！定义光信道 ]T! }XXK  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm FaT
a(3$%  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 KP;(Q+qTx  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W AT Zhr. H  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um co4h*?q  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 vEM(bT=H  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 wJb#
g0  
#(Or|\t  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm bte~c  
w_s := 7 um                          ！信号光的半径 .@ C{3$,VG  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 zZ-wG  
loss_s := 0                            ！信号光寄生损耗为0 +KGZHO!  
}0hL~i  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 Yx'res4e  
;#GoGb4AM  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 p4>$z& _  
calc u),Qa=Wp  
  begin 1xJ TWWj-  
    global allow all;                   ！声明全局变量  q}Z3?W  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 v ]Sl<%ry  
    add_ring(r_co, N_Tm); wu<])&F  
    def_ionsystem();              ！光谱数据函数 @xsP5je]  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 }G46g#_6d>  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 v<\A%  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 .Jb$l$5'w  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ^62|d  
    finish_fiber();                                   a\uie$"cr]  
  end; hw_JDv+  
r9 y.i(j
 
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 ;32#t[ib
 
show "Outputpowers:"                                   ！输出字符串Output powers： #BK9 k>i  
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） g_*T?;!.U  
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） z!Q
DTIb  
"bg'@:4F  
YO{GU7  
; ------------- I[MgIr^  
diagram 1:                   !输出图表1 F-(dRSDNM  
9n]|PE
oAB  
"Powers vs.Position"          ！图表名称 \hO2p6  
Uv_N x10  
x: 0, L_f                      ！命令x: 定义x坐标范围 39U5jj7i  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 fa*Cpt:  
y: 0, 15                      ！命令y: 定义y坐标范围 >4m'tZ8  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 Y/TlE?  
frame          ！frame改变坐标系的设置 OkAK  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 6TWWlU^e  
hx             ！平行于x方向网格 .o%^'m"=D[  
hy              ！平行于y方向网格 z><5R|Gf  
b/$km?R  
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 a~h:qpgc  
  color = red,  ！图形颜色 P27%xV-n>  
  width = 3,   ！width线条宽度 >>l`,+y  
  "pump"       ！相应的文本字符串标签 eC DIwB28  
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]1  
  color = blue,     r#PMy$7L  
  width = 3, m4K* <  
  "fw signal" r90+,aLM#?  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 &ej8mq"\  
  color = blue, .Hhhi  
  style = fdashed, 6q<YJ.,  
  width = 3, >t,M  
  "bw signal" v1U?&C  
os3 8u!3-  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 o!TQk{0  
  yscale = 2,            ！第二个y轴的缩放比例 e;bYaM4UX  
  color = magenta, (w(  
  width = 3, _R|Ify#J  
  style = fdashed, MmPU7Nl%X  
  "n2 (%, right scale)" }/dRU${!  
xVB;s.'!  
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 vgIpj3u  
  yscale = 2, snM Z0W  
  color = red, )O+}T5c=  
  width = 3, t9gfU5?  
  style = fdashed, qIUfPA=/_  
  "n3 (%, right scale)" dhg~$CVO  
?rVy2!  
x}/,yaWZ  
; ------------- |!|^ v  
diagram 2:                    ！输出图表2 Xy,lA4IP  
Eh</? Qv\  
"Variation ofthe Pump Power" 2A`A\19t  
[sV"ws  
x: 0, 10 5FVndMM#y  
"pump inputpower (W)", @x "|Fy+'5}  
y: 0, 10 v!3A9!.  
y2: 0, 100 5[l8y,  
frame xp'_%n~K@  
hx oeSN9O  
hy ;DA8B'^>  
legpos 150, 150 ~fl@ 2  
^VW PdH/Fe  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 2I3h MD0  
  step = 5,
hDP/JN8y  
  color = blue, bUV >^d  
  width = 3, U/ V  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 gXT9 r' k  
  finish set_P_in(pump, P_pump_in) +:=(#Y  
m`#Od^vk  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 yw[#  
  yscale = 2, 7 J^rv9i4  
  step = 5, L$'[5"ma ;  
  color = magenta, .Ig+Dj{)  
  width = 3, #1c]PX  
  "population of level 2 (%, rightscale)", 8,D 2^Gg  
  finish set_P_in(pump, P_pump_in) T J^u"j-'  
uY_SU-v  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 H>Q%"|  
  yscale = 2, B!{d-gb  
  step = 5, m42T9wSsx  
  color = red, ` 8W*  
  width = 3, 'ckQg=zPR  
  "population of level 3 (%, rightscale)", eAUcv`[#p  
  finish set_P_in(pump, P_pump_in) 5Dp#u  
sb:d>6  
J]W5[)L  
; ------------- uZa9zs=}c  
diagram 3:                         ！输出图表3  [=O/1T  
rqv))Zo`  
"Variation ofthe Fiber Length" 6-`|:[Q~  
~DO4,  
x: 0.1, 5 I`[i;U{CK  
"fiber length(m)", @x 5tJ,7
Y'  
y: 0, 10 hPq%Lc  
"opticalpowers (W)", @y @3fn)YQ'  
frame 9[!,c`pw  
hx _AV1WS;^^8  
hy O/:UJ( e{  
tH=
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f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 ^@P1 JNe  
  step = 20,             8u[-'pV!  
  color = blue, }:: S0l  
  width = 3, _'4A|-9  
  "signal output" xw{-9k-~  
#T`t79*N  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 0CSv10Tg  
   step = 20, color = red, width = 3,"residual pump" y"]n:M:(  
Ehzo05/!  
! set_L(L_f) {restore the original fiber length }  zYXV;  
[dtbkQt,c  
d0'JC*  
; ------------- ?!qY,9lhH  
diagram 4:                                  ！输出图表4 r"$.4@gc  
=b;>?dP  
"TransverseProfiles" Vcd.mE(t%  
Pxn,Qw*  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) MO;X>D=  
kq\)MQ"/X  
x: 0, 1.4 * r_co /um at2FmBdu C  
"radialposition (µm)", @x oYWR')8g  
y: 0, 1.2 * I_max *cm^2 dr4
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"intensity (W/ cm&sup2;)", @y zByT$P-  
y2: 0, 1.3 * N_Tm kw2T>  
frame }b1cLchl  
hx Nn>'^KZNG  
hy keRE==(D  
;lYHQQd!,  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 u!1{Vt87  
  yscale = 2, `3p~m,  
  color = gray, >u9Nz0?j  
  width = 3, gGfoO[B  
  maxconnect = 1, ;Eu3[[V  
  "N_dop (right scale)" 9Fn\FYUq  
Jk,;JQ  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 m%?V7-9!k  
  color = red, IK*07h/!  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 +{
sqcr1G  
  width = 3, x@8a''  
  "pump" :[;hu}!&  
(sWLhUgRX  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 OtFh,}E  
  color = blue, .s$
z/Jv  
  maxconnect = 1, }i!J/tJ)b  
  width = 3, z3?o|A}/W  
  "signal" yCCrK@{oo  
vloF::1  
$1SUU F\.  
; ------------- !A48TgAeE  
diagram 5:                                  ！输出图表5 !ct4;.2 D  
{k rswh3  
"TransitionCross-sections" `({T]@]V  
cX3lt5  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 86nN"!{l:  
HaIM#R32T  
x: 1450, 2050 nS>8bub30  
"wavelength(nm)", @x (p%>j0<  
y: 0, 0.6 =-p$jXVW%  
"cross-sections(1e-24 m&sup2;)", @y m.,U:>  
frame ID/F  
hx O*#*%RL|  
hy 6AocmR0D'  
aMTu-hA  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 47J5oPT2'  
  color = red, 7`u$  
  width = 3, v0L\0&+  
  "absorption" 4*$G & TX  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 ->N8#XH2=  
  color = blue, NO :a;  
  width = 3, W^"AU;^V56  
  "emission" O$c
HZs$  
$tl\UH7%2  

感谢，视频上有点看不清楚