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

(* F[9IHT6{  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ysvn*9h+&  
pumped at 790 nm. Across-relaxation process allows for efficient A(<- U|  
population of theupper laser level. [;};qQ-C2  
*)            ！（*  *）注释语句 F7=a|g  
.H9!UQ&It  
diagram shown: 1,2,3,4,5  ！指定输出图表 hWuq  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 GfVMj7{  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 AvH/Q_-b  
; 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 [?;oiEe.|  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置
I /RvU,  
; 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 |[xi"E\  
W>s<&Vb  
include"Units.inc"         ！读取“Units.inc”文件中内容 HaLEQ73  
1=#`&f5f&  
include"Tm-silicate.inc"    ！读取光谱数据 !74*APPHR  
~*G I<n  
; Basic fiberparameters:    ！定义基本光纤参数 V GM/ed5-  
L_f := 4 { fiberlength }      ！光纤长度 M}us^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 #Etz}:%W  
r_co := 6 um { coreradius }                ！纤芯半径 drF"kTD"7  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 JCE364$$"  
"BEU%,w  
; Parameters of thechannels:                ！定义光信道 arDY@o~  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm A.y
"R)G  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 l$PO!JRD  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W l1!i3m'x  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um }p."7(  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 #16)7  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 {"s9A&  
u;y1leG  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm TS@EE&Wq  
w_s := 7 um                          ！信号光的半径 4}96|2L5  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 5tQffo8t  
loss_s := 0                            ！信号光寄生损耗为0 -cJ(iz9!  
Rm6<"SLV  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 Cc9<ABv?  
+Hv%m8'0|  
; 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 vR#A7y @!  
calc ^oaG.)3  
  begin <g,xc)[  
    global allow all;                   ！声明全局变量 KvC:(Vqj  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 )V~<8/)  
    add_ring(r_co, N_Tm); lD\lFN(:
 
    def_ionsystem();              ！光谱数据函数 <XGOcekG  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 @$Z5Ag!  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 Hk$|.TjzI  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 P0UMMn\-#  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 k|a{|2p  
    finish_fiber();                                   Cl i k  
  end; (r:WG!I,  
, lT8gQ|u  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 3-tp94`8}t  
show "Outputpowers:"                                   ！输出字符串Output powers： l&
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） Mm|HA
@W^  
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） oa47TqFt  
>0B[  
dzggl(  
; ------------- d$b{KyUA  
diagram 1:                   !输出图表1 ,O $F`0>9A  
u=k\]W-  
"Powers vs.Position"          ！图表名称 E70
 
m,qU})  
x: 0, L_f                      ！命令x: 定义x坐标范围 2{#*z%|z  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 ^:LF  
y: 0, 15                      ！命令y: 定义y坐标范围 0nG& LL5  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 $;"@;Lj%,  
frame          ！frame改变坐标系的设置 `Fu|50_@V  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） Koahd=  
hx             ！平行于x方向网格 5|Vb)QBv%  
hy              ！平行于y方向网格 ~r&Q\G  
H;Z{R@kf  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 <&b ~(f  
  color = red,  ！图形颜色 7A7K:,c  
  width = 3,   ！width线条宽度 l AE$HP'o  
  "pump"       ！相应的文本字符串标签 [Zi\L>PHO  
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 sRt|G  
  color = blue,     tE<L4;t  
  width = 3, Lp1wA*  
  "fw signal" u&r@@p.  
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 V ;"?='vVe  
  color = blue, eAm7*2  
  style = fdashed, (f $Y0;v>}  
  width = 3, |0A n|18  
  "bw signal" oKzV!~{0M;  
UyTq(7uo  
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 7q$9\RR5  
  yscale = 2,            ！第二个y轴的缩放比例 /8J2,8vZ  
  color = magenta, W $H8[G  
  width = 3, OlMCF.W#3  
  style = fdashed, .oAg (@^6  
  "n2 (%, right scale)" XlDVJx<&J  
 YVD%GJ  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 rS)7D  
  yscale = 2, - stSl*  
  color = red, 6L'cD1pu  
  width = 3, wp.'M?6`L  
  style = fdashed, ra$_#HY  
  "n3 (%, right scale)" F#Z]Xq0r  
F''4j8  
8t9sdqM/C  
; ------------- NM[w=  
diagram 2:                    ！输出图表2 QF!K$?EU[  
:t^=~xO9  
"Variation ofthe Pump Power" Ho\K %#u
 
LEHlfB#z`@  
x: 0, 10 |;9OvR> A  
"pump inputpower (W)", @x 2Xe2%{  
y: 0, 10 5wP(/?sRy  
y2: 0, 100 2*%0m^#^6  
frame r{p?aG  
hx ] M_[*OAb  
hy |VaXOdD`&  
legpos 150, 150 b>Vs5nY!  
gaTI:SKzc  
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 %C'!L]#  
  step = 5, O_(J',++  
  color = blue, }^)M)8zS  
  width = 3,  QqtFNG  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 }[D[ZLv  
  finish set_P_in(pump, P_pump_in) W53i5u(  
|hOqz2|  
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 ;l}TUo  
  yscale = 2, P0}uTee  
  step = 5, mbJ#-^}V  
  color = magenta, z}u  
  width = 3, u+XZdV  
  "population of level 2 (%, rightscale)", ~`8`kk8  
  finish set_P_in(pump, P_pump_in) (p^q3\
 
;t[<
!  
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 7&|fD{:4U  
  yscale = 2, l.>QO ;  
  step = 5, ,B!u*  
  color = red, QP[w{T  
  width = 3, Ms^,]Q1{  
  "population of level 3 (%, rightscale)", VGq2ITg9eE  
  finish set_P_in(pump, P_pump_in) vTP'\^;  
RHVMlMX  
rs 7R5 F  
; ------------- sE-"TNONZ  
diagram 3:                         ！输出图表3 &ATjDbW*(  
wzP>Cq  
"Variation ofthe Fiber Length" 0'RSl~QvqS  
o5. q  
x: 0.1, 5 *hFT,1WE=+  
"fiber length(m)", @x <@@.~Qm'  
y: 0, 10 g0_8:Gs}^  
"opticalpowers (W)", @y l,,5OZw  
frame U2@?!B[\d`  
hx H[!by)H  
hy >E[cl\5$E  
=(.HO:#  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 g%[lUxL  
  step = 20,             TpZ)v.w~l7  
  color = blue, J"I{0>@  
  width = 3, fu\M2
"e  
  "signal output" Bam7^g'*!3  
;Fp"]z!Qh+  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 NWb,$/7T  
   step = 20, color = red, width = 3,"residual pump" =,,!a/U  
v=9:N/sW  
! set_L(L_f) {restore the original fiber length } Sf lHSMFw  
bBC3% H^  
.* VZY  
; ------------- &7JCPw  
diagram 4:                                  ！输出图表4 [ V/*{Z  
Ko2{[%  
"TransverseProfiles" VY Va8[}  
e"[o2=v;5  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) SP5/K3t-*  
A2*
z  
x: 0, 1.4 * r_co /um N[E t  
"radialposition (µm)", @x PL%_V ?z  
y: 0, 1.2 * I_max *cm^2 v7xc01x  
"intensity (W/ cm&sup2;)", @y ]NG`MZ  
y2: 0, 1.3 * N_Tm ),dXaP[  
frame J?u@' "u  
hx *,@dt+H!y  
hy 
h ej  
!W .ooy5(  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 @ 5|F:J  
  yscale = 2, iI&J_Y{1a_  
  color = gray, (A/V(.!  
  width = 3, ~48Uch\LG:  
  maxconnect = 1, |4ONGU*`E  
  "N_dop (right scale)" bC)diC  
C!%BW%"R  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 DY0G;L3  
  color = red, 7p@qzE  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 UR:cBr  
  width = 3, GC~Tfrf=r  
  "pump" jrZM  
u ;f~  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 a 0Hzf  
  color = blue, |SQ5Sb  
  maxconnect = 1, u])N^AY"sj  
  width = 3, Y(-4Agq  
  "signal" j<Lj1P3  
1^b-J0  
&v'e;W  
; ------------- ]'EtLFv)  
diagram 5:                                  ！输出图表5 W;eHDQ|  

Jf YO|,  
"TransitionCross-sections" WENPS*0oS]  
u-f_,],p  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) TB1E1  
pg [F{T<  
x: 1450, 2050 0!eZ&.h?4  
"wavelength(nm)", @x CES^ c-. k  
y: 0, 0.6 DnMfHG[<  
"cross-sections(1e-24 m&sup2;)", @y /P Qz$e-!Y  
frame [wj&.I{^s  
hx B9&"/tT  
hy "z1\I\ ^  
gp$oQh#37;  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 @M?;~M?B]J  
  color = red, r**u=q%p  
  width = 3, N3!x7J7A  
  "absorption" h%8[];*DpN  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 %J5zfNe)&  
  color = blue, KtG|m'\D  
  width = 3, nNSq6 Cj  
  "emission" J/:
9;{R  
c0sU1:e0  

感谢，视频上有点看不清楚