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

(* 0\wMlV`F  
Demo for program"RP Fiber Power": thulium-doped fiber laser, a
=gTGG"9  
pumped at 790 nm. Across-relaxation process allows for efficient mwCNfw
b:  
population of theupper laser level. 1j6ZSE/*|  
*)            ！（*  *）注释语句 uJMF\G=nb  
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diagram shown: 1,2,3,4,5  ！指定输出图表 ?)1h.K1}M  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 "j3Yu4_ks  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 *%'4.He7V  
; 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 oo3ZYA  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 LLg ']9  
; 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 z7MJxjH  
p*W4^2(d  
include"Units.inc"         ！读取“Units.inc”文件中内容 WDKj)f9cy  
e>1^i;f  
include"Tm-silicate.inc"    ！读取光谱数据 _x z_D12  
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; Basic fiberparameters:    ！定义基本光纤参数 a<sEdp  
L_f := 4 { fiberlength }      ！光纤长度 :q;vZ6Xd  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 (iGk]Rtzt  
r_co := 6 um { coreradius }                ！纤芯半径 z]Z>+|  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 q NU\XO`H  
s>~!r.GC  
; Parameters of thechannels:                ！定义光信道 8;p6~&).C~  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm H0 km*5Sn  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 v@`#!iu  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W %fh ,e5(LT  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 6*kY7  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 }0?642 =-  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 [f.[C5f%"'  
;:cU/{W  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm d4[M{LSl  
w_s := 7 um                          ！信号光的半径 O\XN/R3  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 TuBg4\V  
loss_s := 0                            ！信号光寄生损耗为0 :74^?  
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R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率
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N+b"LZc  
; 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 ;yY>SaQ  
calc f'aUo|^?  
  begin "X>Z!>  
    global allow all;                   ！声明全局变量 !s?vj
<  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 nO$(\ z)  
    add_ring(r_co, N_Tm); B y6:
 
    def_ionsystem();              ！光谱数据函数 YQ4;X8I`r  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 c3P
 
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 9X@y*;w<t  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 5ts8o&|   
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Vg\EAs>f  
    finish_fiber();                                   engql;  
  end; z++*,2F  
%@G<B  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 =:1f 0QF  
show "Outputpowers:"                                   ！输出字符串Output powers： Io5-[d  
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） =YB3^Z  
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?g&Vw$m  
nC qUg_{D  
O%tlj@?  
; ------------- NV9D;g$Y  
diagram 1:                   !输出图表1 UALwr>+VJ  
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"Powers vs.Position"          ！图表名称 E%3WJ%A  
HpSgGhL'J&  
x: 0, L_f                      ！命令x: 定义x坐标范围 ub{<m^|)  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 c|:H/Y2n|  
y: 0, 15                      ！命令y: 定义y坐标范围 7sC$hm]  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 pxM^|?Hxc  
frame          ！frame改变坐标系的设置 S$%T0~PR~  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ^uMy|d  
hx             ！平行于x方向网格 TRcY!  
hy              ！平行于y方向网格 @mNf(&  
I/Hwf  
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 %8yfFrk  
  color = red,  ！图形颜色 f&js,NU"  
  width = 3,   ！width线条宽度  |UZ#2  
  "pump"       ！相应的文本字符串标签 f/&Dy'OV7  
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 <)uUAh  
  color = blue,     R4_4FEo  
  width = 3, x5WFPY$wM  
  "fw signal" /$! /F@^  
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 Gz+Bk5#{  
  color = blue, ^p|MkB?uM  
  style = fdashed, Ii
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  width = 3, uPsn~>(4  
  "bw signal" {K09U^JU  
9<.Fw
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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 LU?X|{z  
  yscale = 2,            ！第二个y轴的缩放比例 a,#f%#J\  
  color = magenta, c;&m}ImLe.  
  width = 3, s!9.o_k  
  style = fdashed, !Q*.Dw()[  
  "n2 (%, right scale)" kmi[u8iXD_  
SWz+.W{KQ"  
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  PQa{5"  
  yscale = 2, e/6WhFN#  
  color = red, Lf3Ri/@ p  
  width = 3, %q;3bfq@N  
  style = fdashed, 0 oEw1!cY  
  "n3 (%, right scale)" R^1sbmwk  
z~L4BY@z  
TF}<,aR  
; ------------- 2wlrei  
diagram 2:                    ！输出图表2 d8C?m*3J  
YKJk)%;+w  
"Variation ofthe Pump Power" T@U_;v|rf  
2_x}wB0P  
x: 0, 10 ~
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"pump inputpower (W)", @x 'aBX>M  
y: 0, 10 W|NzdxCY  
y2: 0, 100 f` 2W}|(jA  
frame O/e5LA  
hx $LRvPan`  
hy _'ltz!~  
legpos 150, 150 m>x.4aO1  
kUUN2  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 YjdCCju  
  step = 5, fZ`b~ZBwIj  
  color = blue, <K=:_  
  width = 3, ~%qHJ4C  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 S`8 h]vX  
  finish set_P_in(pump, P_pump_in) 7m~+
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S)iv k x  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 :UoZ`O~  
  yscale = 2, 94=Wy-  
  step = 5, %C" wUAY  
  color = magenta, t4GG@`  
  width = 3, 5n"b$hMF  
  "population of level 2 (%, rightscale)", [c+[t3dz  
  finish set_P_in(pump, P_pump_in) sTP`xaY  
b] DF7 U  
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 X~*1  
  yscale = 2, XpJT
/&4  
  step = 5, {VE\}zKF  
  color = red, 1#qyD3K  
  width = 3, yd$_XWp?\  
  "population of level 3 (%, rightscale)", !X$e;V"HX  
  finish set_P_in(pump, P_pump_in) hk3}}jc  
-%E+Yl{v  
&#;vR0O  
; ------------- OIGu`%~js  
diagram 3:                         ！输出图表3 z4!TK ps  
qZ
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"Variation ofthe Fiber Length" ^q-]."W]t~  
o9(:m   
x: 0.1, 5 0k>bsn/j  
"fiber length(m)", @x {u{n b3/jl  
y: 0, 10 bX6eNk-L  
"opticalpowers (W)", @y $bIVD  
frame L9M0vkgri  
hx yDg`9q.ckm  
hy ,j>A[e&.  
\b95CU  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 5MfbO3  
  step = 20,             qPDe;$J)  
  color = blue, 9_)*b  
  width = 3, cK%Sty'8+  
  "signal output" b
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87l(a,#J  
;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 -f@~{rK.L  
   step = 20, color = red, width = 3,"residual pump" Jte:U*2  
ZX[@P?A+-  
! set_L(L_f) {restore the original fiber length } `qn
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; ------------- o
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diagram 4:                                  ！输出图表4 141@$mMzE  
P&@ 2DI3m  
"TransverseProfiles" 1vk&;  
%"B+;{y(5  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) &o%IKB@  
>Vc;s!R  
x: 0, 1.4 * r_co /um _Cn[|E  
"radialposition (µm)", @x .`*h2  
y: 0, 1.2 * I_max *cm^2 70hm9b-   
"intensity (W/ cm&sup2;)", @y @px2/x  
y2: 0, 1.3 * N_Tm +AkAMZ"Mg  
frame OZ##x  
hx P7np -I*  
hy "I+71Ce  
8 :B(}Y4K  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 &v9*D`7L  
  yscale = 2, uv,&/,;S  
  color = gray, "=8= G  
  width = 3, uU_lC5A|  
  maxconnect = 1, hDBVL"  
  "N_dop (right scale)" P(AcDG6K  
whFaL}2C  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 0}v_usP  
  color = red, _voU^-  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 f/+UD-@%m  
  width = 3, zv/owK  
  "pump" o^HzE;L}  
R8ZI}C
1  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 |hGi8  
  color = blue, #$k6OlK-r"  
  maxconnect = 1, Z ,4G'[d  
  width = 3, kq+`.  
  "signal" $
;~  
4FLL*LCNX  
'KL!)}B$h  
; ------------- ~Psv[b=]  
diagram 5:                                  ！输出图表5 BhFyEY(  
v:.`~h/b  
"TransitionCross-sections" Ujb7uho  
=VXxQ\{  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 3pQ^vbQ"  
#>)OLKP  
x: 1450, 2050 LYM(eK5V  
"wavelength(nm)", @x ;F3#AO4(  
y: 0, 0.6 @ootKY`  
"cross-sections(1e-24 m&sup2;)", @y s,~)5nL  
frame 8"
:O\^i  
hx F,
F1Axf  
hy 2$S^3$k'  
"WPFZw:9  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 gFBMARxi  
  color = red, m~$S]Wf  
  width = 3, +,wCV2>\3  
  "absorption" N5]}m:"pk  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 R>|)-"b( `  
  color = blue, LS(J%\hMDm  
  width = 3, Cx,)$!1  
  "emission" 0J \hku\  
w]-,X`  

感谢，视频上有点看不清楚