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

(* ^n~bx*f  
Demo for program"RP Fiber Power": thulium-doped fiber laser, u%sfHGrH  
pumped at 790 nm. Across-relaxation process allows for efficient DrA\-G_7  
population of theupper laser level. :erfs}I  
*)            ！（*  *）注释语句 7tQ?av  
hAU@}"=G  
diagram shown: 1,2,3,4,5  ！指定输出图表 45A|KaVpg  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ^ DCBL&I  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 x@#aOf4<U  
; 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 e82xBLxR%  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 Lq2ZgKd!  
; 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 Tnoy#w}Ve  
.oH)eD  
include"Units.inc"         ！读取“Units.inc”文件中内容 <N{Y*,^z  
,s`4k?y  
include"Tm-silicate.inc"    ！读取光谱数据 8h,=yAn5  
Dgc}
T8R  
; Basic fiberparameters:    ！定义基本光纤参数 )m_q2xV  
L_f := 4 { fiberlength }      ！光纤长度 !xvAy3  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 pS+hE4D  
r_co := 6 um { coreradius }                ！纤芯半径 +$$5Cv5#<&  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 TpcJ1*t  
N$N7aE$  
; Parameters of thechannels:                ！定义光信道 g&I
|@$\  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm j:E3c\a  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 L@"&s#~=3  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W t?wVh0gT  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Q6;bORN  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 [JYy  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 4^T_" W}  
W:>XXUU  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm &}r-C97  
w_s := 7 um                          ！信号光的半径 ^cCNQS}r  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 TeRH@oI  
loss_s := 0                            ！信号光寄生损耗为0 K_F"j!0  
NA=m<n#  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 #'dNSez5  
q.VZP  
; 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 hc*tQ2
 
calc ?=G{2E.  
  begin SZvp%hS0  
    global allow all;                   ！声明全局变量 k)R~o b  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 xnxNc5$oE  
    add_ring(r_co, N_Tm); RTr"#[  
    def_ionsystem();              ！光谱数据函数 W`uq,r0Xsy  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 %7[q%S  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 MM6PaD{  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Pk>S;KT.  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 .d6b?t  
    finish_fiber();                                   fJ=v?  
  end; f2u4*X E\  
sQ.t3a3m  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 w=FU:q/  
show "Outputpowers:"                                   ！输出字符串Output powers： hP}-yW6]  
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） YC(X= D  
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） $[oRbH8g  
\k{d'R#~(  
6O_l;A[=1  
; ------------- s|I$c;>  
diagram 1:                   !输出图表1 oqo7Ge2  
3YG%YhevO  
"Powers vs.Position"          ！图表名称 wg<t*6&'x  
2f
g P  
x: 0, L_f                      ！命令x: 定义x坐标范围 Z*Rg
ik  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 %C_c%3d  
y: 0, 15                      ！命令y: 定义y坐标范围 h>F"GR?U_(  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 EQ.K+d*K][  
frame          ！frame改变坐标系的设置 iBwM]Eyv.  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） hj}PL  
hx             ！平行于x方向网格 =RAojoN  
hy              ！平行于y方向网格 {eVv%sbq  
sX-@ >%l  
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 !hjF"Pa  
  color = red,  ！图形颜色 s bd$.6 |&  
  width = 3,   ！width线条宽度 M:dH>  
  "pump"       ！相应的文本字符串标签 H>

o \C  
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 %j/pln&  
  color = blue,     > `mV^QD  
  width = 3, h^ K]ASj  
  "fw signal" Ahc9HA2  
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 +,cd$,18  
  color = blue, 6AoKuT;
 
  style = fdashed, X`J86G)  
  width = 3, 34Cnbtq^  
  "bw signal" j#xGB]  
FmhAUe  
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 x4(8 =&Z  
  yscale = 2,            ！第二个y轴的缩放比例 )7X$um  
  color = magenta, 
[%O f  
  width = 3, *Q)-"]O(k  
  style = fdashed, 4H NaE{O4  
  "n2 (%, right scale)" ~FQHT?DAo  
)U7fPKQ  
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 _8!x  
  yscale = 2, v*&jA8D  
  color = red, ?z2!?  
  width = 3, ?rA3<j  
  style = fdashed, JPHM+3v  
  "n3 (%, right scale)" "vg.{
 
#kh:GAp]  
K|l}+:k  
; ------------- q#SEtyJL  
diagram 2:                    ！输出图表2 P]TT8Jgw  
A7,%'.k  
"Variation ofthe Pump Power" B"zB=Aw  
,iY:#E  
x: 0, 10 bt(Y@3;  
"pump inputpower (W)", @x
^B%c3U$o  
y: 0, 10 CyS%11L  
y2: 0, 100 c*]f#yr?  
frame 1)jeawVmj  
hx H=\Tse_.  
hy i]J.WFu  
legpos 150, 150 ^G2M4+W|  
_C(fz CK  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 CBF<53TshR  
  step = 5, *8uS,s6g  
  color = blue, N/'  
  width = 3, znSlSQpTv  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 p2k`)=iX  
  finish set_P_in(pump, P_pump_in) oK 7:e~  
Jm#p!G+  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 O!^ >YvOh  
  yscale = 2, J3~%9MCJ  
  step = 5, r>7+&s*yk  
  color = magenta, %l14K_  
  width = 3, *^Ges;5$"  
  "population of level 2 (%, rightscale)", /-i m g^^  
  finish set_P_in(pump, P_pump_in) 9#m3<oSJ  
^,mN-.W  
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 idGn{f((f  
  yscale = 2, ExSM=  
  step = 5, /CMgWGI  
  color = red, K*{RGE  
  width = 3, +/l@ou'  
  "population of level 3 (%, rightscale)", S89j:KRXH%  
  finish set_P_in(pump, P_pump_in) vz>9jw:Y  
<\fA}b  
dP(.l}O  
; ------------- U\B9Ab  
diagram 3:                         ！输出图表3 Kw$@_~BJ6  
zi3v,Kq  
"Variation ofthe Fiber Length" B@NBN&Fr  
cm_5,wB(w  
x: 0.1, 5 ACi,$Uq6R  
"fiber length(m)", @x `GW&*[.7  
y: 0, 10 ^<-)rzTI  
"opticalpowers (W)", @y E:dN)  
frame Du65>O  
hx s]OZ+^Z  
hy A%?c1`ZxF  
"uT2 DY[  
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 -gk2$P-  
  step = 20,             4H%#Sn#L^!  
  color = blue, ej@4jpHQN  
  width = 3, |>.MH  
  "signal output" 0%%U7GFB5  
7M7Lj0Y)L  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 pe0ax-Zv  
   step = 20, color = red, width = 3,"residual pump" D_0sXIbg  
yo->mD  
! set_L(L_f) {restore the original fiber length } R]e&JoY  
egSs=\  
R!QR@*N  
; ------------- G+Z ,ic  
diagram 4:                                  ！输出图表4 G4*&9Wo  
8s2y!pn7Q  
"TransverseProfiles" M>Tg$^lm  
m"/..&'GC  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 1fMV$T==K  
EyVu-4L:#  
x: 0, 1.4 * r_co /um 0)g]pG8&ro  
"radialposition (µm)", @x V^R,j1*  
y: 0, 1.2 * I_max *cm^2 BYMdX J  
"intensity (W/ cm&sup2;)", @y X/cb1#  
y2: 0, 1.3 * N_Tm _AX,}9
 
frame -dO8Uis$  
hx Uq_lT,  
hy %(p9AE  
"{qnm+G  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 ~cSXBc,+  
  yscale = 2, tc[Ld#
 
  color = gray, VBPtM{g  
  width = 3, ,
cS#  
  maxconnect = 1, 9x!kvB6  
  "N_dop (right scale)" CEkUXsp  
O50<h O]l  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 E56  
  color = red, (}6\_k[}m  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 i0/QfB%O  
  width = 3, aT IzfqCM  
  "pump" HVoPJ!K3  
MXfyj5K  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 /7\q#qIm:  
  color = blue, 035jU'  
  maxconnect = 1, -K?lhu  
  width = 3, oF>`>  
  "signal" A :KZyd"Z  
xtD(tiqh.;  
VnkhY  
; ------------- }:c~5whN  
diagram 5:                                  ！输出图表5 qMVuFwPhi  
7r'_p$  
"TransitionCross-sections" G^nG^HTo5  
"*D9.LyM  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 9%|skTgIqH  
hvO$ f.i  
x: 1450, 2050 48^C+#Jbc  
"wavelength(nm)", @x 4GF3.?3  
y: 0, 0.6 D
!Y@Og.  
"cross-sections(1e-24 m&sup2;)", @y \3^V-/SJf  
frame i&lW&]  
hx +@!\3a4!  
hy y7:f^4  
frPQi{u$  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 f!yl&ulKU  
  color = red, 467"pqT  
  width = 3, R,78}7B  
  "absorption" kP[fhOpn  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 %i3[x.M  
  color = blue, H!7?#tRU  
  width = 3, qGH[kd  
  "emission"
$`7Fk%#+e  
[<U=)!Swg  

感谢，视频上有点看不清楚