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

(* jdD`C`w|,  
Demo for program"RP Fiber Power": thulium-doped fiber laser, *pGbcB
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pumped at 790 nm. Across-relaxation process allows for efficient j+3=&PkA.]  
population of theupper laser level. a3_pF~Qx  
*)            ！（*  *）注释语句 qUNXT  
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diagram shown: 1,2,3,4,5  ！指定输出图表 s.!gsCQme  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 M`G#cEc  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 wo) lkovd  
; 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 `9VRT`e  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 SM`n:{N(  
; 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 z0tm3ovp  
Y#Pg*C8>8  
include"Units.inc"         ！读取“Units.inc”文件中内容 sTYA  
*i7|~q/u  
include"Tm-silicate.inc"    ！读取光谱数据 2MKB(;k  
u+]8S
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; Basic fiberparameters:    ！定义基本光纤参数 )G|'PXI
@,  
L_f := 4 { fiberlength }      ！光纤长度 -sk!XWW+  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 Czd)AVK  
r_co := 6 um { coreradius }                ！纤芯半径 hzy#%FaB  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ;[j)g,7{  
O ;B[ZMV  
; Parameters of thechannels:                ！定义光信道 &o)eRcwH`  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm E"Y[k8-:2/  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 09HqiROw  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ~$ "P\iJ  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um bX&=*L+h6  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 1:q5h*  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 7brC@+ZD  
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l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm p!
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w_s := 7 um                          ！信号光的半径 nTPq|=C  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 ]KRw[}z  
loss_s := 0                            ！信号光寄生损耗为0 Sa$-Yf  
Fpy-?U  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ;[[oZ  
agPTY{;  
; 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 N/N~>7f  
calc 4#wZ#}  
  begin zM|Y X<  
    global allow all;                   ！声明全局变量 ,9~2#[|lq  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 +T]D\];D  
    add_ring(r_co, N_Tm); rIWQD%Afm  
    def_ionsystem();              ！光谱数据函数 =$Sd2UD  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 R"qxT.P(  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 /gq VXDY+`  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 J0x)NnWJ  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ]*vv=@"`e  
    finish_fiber();                                   VPXUy=W  
  end; i}r|Zo  
8{4jlL;"`?  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 aO$I|!tl  
show "Outputpowers:"                                   ！输出字符串Output powers： ps3jw*QZ{5  
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） PFPZ]XI%F  
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） h_K!ch}  
z[0B"f  
4jdP3Q/  
; ------------- ,ftKRq  
diagram 1:                   !输出图表1 5?1:RE(1  
tsN,yI]-VA  
"Powers vs.Position"          ！图表名称 zP|^) h5  
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x: 0, L_f                      ！命令x: 定义x坐标范围 |'N
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"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 &Z6s\r%  
y: 0, 15                      ！命令y: 定义y坐标范围 6ly`lu9  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 L/2,r*LNx$  
frame          ！frame改变坐标系的设置 qv.s-@l8  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） cCbZ*  
hx             ！平行于x方向网格 %oHK=],|1  
hy              ！平行于y方向网格 :"I!$_E'  
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f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 Q?]-/v  
  color = red,  ！图形颜色 J>p6')Y6~  
  width = 3,   ！width线条宽度 nb}rfd.  
  "pump"       ！相应的文本字符串标签 YzVhNJ
Wpw  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 E]dmXH8A  
  color = blue,     HGlQZwf  
  width = 3, `D={l29H  
  "fw signal" 5l4YYwd>v  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 6>&h9@  
  color = blue, fm1yZX?`  
  style = fdashed, 6g&Ev'  
  width = 3, +Un(VTD  
  "bw signal" 3 G_0DS  
aGq1YOD[$  
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 r6gfxW5  
  yscale = 2,            ！第二个y轴的缩放比例 /Xk-xg+U  
  color = magenta, ZfP$6%;_  
  width = 3, 6tF_u D  
  style = fdashed, X_aC$_b  
  "n2 (%, right scale)" cogIkB&Ju  
kmT5g gy  
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 |Q?^Ba  
  yscale = 2, < wi9   
  color = red, P+bA>lJd  
  width = 3, "kd)dy95H  
  style = fdashed, &$g{i:)Z  
  "n3 (%, right scale)" W!t
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B"?ivxM:U  
y,s`[=CT  
; ------------- U
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diagram 2:                    ！输出图表2 .W s\%S  
D1R$s*{  
"Variation ofthe Pump Power" 2mEvoWnJ  
a&RH_LjM  
x: 0, 10 3t9Weo)  
"pump inputpower (W)", @x y~n1S~5cI  
y: 0, 10 .bY R  
y2: 0, 100 {;vLM* '  
frame gE: ?C2  
hx n#^ii/H  
hy ]p!)8[<  
legpos 150, 150 gy>B 5ie  
oju,2kpH7#  
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 we8aqEomr  
  step = 5, l}SHR|7<  
  color = blue, 50""n7I<%  
  width = 3, &&g02>gE  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 hjD%=Ri0Z  
  finish set_P_in(pump, P_pump_in) uH]oHh!}j  
+}R#mco5K  
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 KX J7
\}  
  yscale = 2, F:N8{puq5  
  step = 5, `vZX"+BAh  
  color = magenta, Qk72ra)  
  width = 3, 8qL.L(=\/  
  "population of level 2 (%, rightscale)", iD*L<9  
  finish set_P_in(pump, P_pump_in) VwOcWKD  
h:RP/0E  
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 R,ZG?/#uM9  
  yscale = 2, BU#3fPl  
  step = 5, 6n^@Ps  
  color = red, 6EeO\Qj{  
  width = 3, GZ^Qt*5 {  
  "population of level 3 (%, rightscale)", ?N^1v&Q  
  finish set_P_in(pump, P_pump_in) ;5DDV6  
/>6ECT  
F3hG8YX  
; ------------- .cm2L,1h  
diagram 3:                         ！输出图表3 9dmoB_G  
_b$ yohQ  
"Variation ofthe Fiber Length" t)1`^W}  
%&S9~E D  
x: 0.1, 5
te
4=  
"fiber length(m)", @x "}V_.I*+  
y: 0, 10 4*&k~0#t  
"opticalpowers (W)", @y .+,U9e:%  
frame PMUW<UI  
hx 5owK2  
hy zz /4 ()u  
inip/&P?V  
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 \
W]gy_=D{  
  step = 20,             mRa\ wEg%  
  color = blue, zy5FO<->  
  width = 3, ?}uuTNLl)  
  "signal output" HItN
d  
@S=9@3m{w;  
;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,4erTBH  
   step = 20, color = red, width = 3,"residual pump" tv26eK 38  
QFMAy>Gdn  
! set_L(L_f) {restore the original fiber length } Ek1c>s,t  
Nte$cTjX  
/ywP 0  
; ------------- N<1+aL\  
diagram 4:                                  ！输出图表4 
q k6  
K{{_qFj@<y  
"TransverseProfiles" +:"0%(  
X'-Yz7J?o  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) xJ2I@*DN  
BM`6<Z"3q  
x: 0, 1.4 * r_co /um N#2ldY *  
"radialposition (µm)", @x 1[T7;i$  
y: 0, 1.2 * I_max *cm^2 *= ?|n  
"intensity (W/ cm&sup2;)", @y a{
.q/Tbt  
y2: 0, 1.3 * N_Tm ZXGi> E
 
frame f:-l}Zj  
hx bMxK@$G~  
hy ~`C_B]3|  
SI=u-'%  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 X fqhD&g  
  yscale = 2, tM^4K r~o,  
  color = gray, !Av9?Q:  
  width = 3, 2 U]d1  
  maxconnect = 1, 6tndC o;`  
  "N_dop (right scale)" L-!1ybB^  
z V\+za,  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 U!`iKy-  
  color = red, Pal=I)  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 +l/v`=C  
  width = 3, 7oWMjw\  
  "pump" [d8Q AO1;)  
l6&\~Z(  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 c%J6!\
 
  color = blue, qS2Nk.e]o  
  maxconnect = 1, qQi\/~Y[:  
  width = 3, !~Uj 'w  
  "signal" Vh;zV Y  
weSq|f  
b.@a,:"  
; -------------  D**GC  
diagram 5:                                  ！输出图表5 b1KtSRLV  
CMaph  
"TransitionCross-sections" {PcJuRTHB  
{^ b2nOMv  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) C
h_rV+  
0{|HRiQH9+  
x: 1450, 2050 E5d$n*A  
"wavelength(nm)", @x wDZ<UP=X  
y: 0, 0.6 WXl+w7jr  
"cross-sections(1e-24 m&sup2;)", @y :q]9F4im  
frame /v8Q17O?e  
hx =O![>Fu5  
hy |zYOCDFf  
^,acU\}VqP  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 AQlB_@ b  
  color = red, 9)ALJd,M  
  width = 3,  :^.wjUI  
  "absorption" 15\m.Ix  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 GWnIy6TH l  
  color = blue, b}3"v(  
  width = 3, Z[oEW>_A  
  "emission" iqQT ^  
g[3LPKQ  

感谢，视频上有点看不清楚