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

(* IHvrx:7  
Demo for program"RP Fiber Power": thulium-doped fiber laser, <F<jx"/)  
pumped at 790 nm. Across-relaxation process allows for efficient -VkPy<)  
population of theupper laser level. B dKD%CJ[  
*)            ！（*  *）注释语句 m!_*Q  
vDcYz,  
diagram shown: 1,2,3,4,5  ！指定输出图表 Jj,fdP#\  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 aF%V  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 #Hi$squJ  
; 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 ZCz#B2Sf8  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 M*7:-Tb]C  
; 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 "*Gp@  
N=~aj7B%  
include"Units.inc"         ！读取“Units.inc”文件中内容 od RtJ[   
L}\~)  
include"Tm-silicate.inc"    ！读取光谱数据 gPw{'7'
U  
o2W^!#]=
 
; Basic fiberparameters:    ！定义基本光纤参数 0. mS^g,M-  
L_f := 4 { fiberlength }      ！光纤长度 98LyzF9  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 raCgctYVq  
r_co := 6 um { coreradius }                ！纤芯半径 C] >?YR4  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 wi@Qf6(mn  
0*XCAnJ^_  
; Parameters of thechannels:                ！定义光信道 -mY,nMDb  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm @tg4rl  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 `$i/f(t6`  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W C9L_`[9DO  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um "ot#g"  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布  95l)w
 
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 OS sYmF  
oJe`]_XZ  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm !?5YXI,  
w_s := 7 um                          ！信号光的半径 NGVl/Qd  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 u?I2|}#  
loss_s := 0                            ！信号光寄生损耗为0 ~NG+DyGa=  
LGT?/gup  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 5`p>BJ+n  
,WtJ&S7?  
; 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 3V%ts7:a  
calc /a?qtRw  
  begin YuFR*W;$  
    global allow all;                   ！声明全局变量 SaSj9\o  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 dq^vK
  
    add_ring(r_co, N_Tm); )%vnl~i!  
    def_ionsystem();              ！光谱数据函数 R(p3*t&n
 
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 M<'He.n  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 @^Yr=d ba  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 9A ?)n<3d  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 \h5!u1{L  
    finish_fiber();                                   4}F~h  
  end; 2(H-q(  
P$5K[Y4f  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 a6!|#rt  
show "Outputpowers:"                                   ！输出字符串Output powers： RZP7h>y6@  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） DhD^w;f]  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） ()e|BFL.  
#eIFRNRb)  
ZY=
a[K  
; ------------- Cf>(,rt};  
diagram 1:                   !输出图表1 u7lO2C7  
#jM-XK  
"Powers vs.Position"          ！图表名称 >)+N$EN  
y_r(06"z1  
x: 0, L_f                      ！命令x: 定义x坐标范围 b)@rp  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 CN:z *g  
y: 0, 15                      ！命令y: 定义y坐标范围 ' r/xBj[Z  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 n50WHlMtt  
frame          ！frame改变坐标系的设置 .I.B,wH8  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ]i\;#pj}
 
hx             ！平行于x方向网格 ZQ{-6VCjl  
hy              ！平行于y方向网格 v?0F  
tmi)LRF H  
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 YO9;NA{sH  
  color = red,  ！图形颜色 G_<4% HM  
  width = 3,   ！width线条宽度 -tfUkGdx;l  
  "pump"       ！相应的文本字符串标签 yt<h!k$ _P  
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 !RSJb  
  color = blue,     @MO/LvD  
  width = 3, 2P^x'I  
  "fw signal" \P7<q,OGS  
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 )3k?{1:  
  color = blue, [Qcht,\^v  
  style = fdashed, SG]Sx4fg,Y  
  width = 3, FG^lh  
  "bw signal" 
2'u%  

hLj7i?  
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 ["[v  
  yscale = 2,            ！第二个y轴的缩放比例 L~AU4
Q0o  
  color = magenta, ~G 3t
xd  
  width = 3, <Xw\:5 F<7  
  style = fdashed, /36gf  
  "n2 (%, right scale)" ;8a9S0eS  
<~P!yLr  
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 K&eT*JW>  
  yscale = 2, E+lr{~  
  color = red, Q-z `rW  
  width = 3, fbD,\ rjT  
  style = fdashed, <w`EU[y_  
  "n3 (%, right scale)" iBI->xU[U  
UE/JV_/S;  
Y&H<8ez  
; ------------- O_]hbXV0  
diagram 2:                    ！输出图表2 w!'y,yb%  
@)U;hk)j;  
"Variation ofthe Pump Power" #k?.dWZ!  
'6; {DX  
x: 0, 10 IqiU  
"pump inputpower (W)", @x )ZI#F]  
y: 0, 10 `jSegG'  
y2: 0, 100 GUZ.Pw  
frame 4}s'xMT!  
hx k7j.VpN9  
hy sO}CXItC+j  
legpos 150, 150 V0BT./ B\<  
p]ujip  
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 iI`
vu  
  step = 5, `So/G  
  color = blue, 3dlY_z=0  
  width = 3, M\-[C!h,  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 F]D{[dBf  
  finish set_P_in(pump, P_pump_in) )[oP`Z  
m2"wMt"*V  
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 ` Nf  
  yscale = 2, bN7m[GRO.  
  step = 5, O-[  
  color = magenta, tGU~G&  
  width = 3, Je,o(:  
  "population of level 2 (%, rightscale)", ptrwZ8'  
  finish set_P_in(pump, P_pump_in) a"Xh  
*5.wwV  
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 `hdff0  
  yscale = 2, ;S \s&.u  
  step = 5, W
MC\J(@.  
  color = red, [NAfy~X*  
  width = 3, I;-Y2*  
  "population of level 3 (%, rightscale)", Wy}^5]R0E  
  finish set_P_in(pump, P_pump_in) kDDC@A $  
~^jPE)  
Qrt\bz h/}  
; ------------- ~T
sRUT  
diagram 3:                         ！输出图表3 lg8@^Pm$r;  
K4jHha  
"Variation ofthe Fiber Length" QS!Z*vG  
pS|K[:5  
x: 0.1, 5 2]Il:>n,  
"fiber length(m)", @x !Ve0:$  
y: 0, 10 \8=)X})  
"opticalpowers (W)", @y CgmAxcK  
frame VnVBA-#r|  
hx ]XbMqHGS  
hy ,h*N9}xYTi  
iiQ q112`  
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 y: x<`E=  
  step = 20,             ZnRT$ l O  
  color = blue, "+T`{$Z=C  
  width = 3, ge1. HG  
  "signal output" )WbWp4  
}x\#u
l)  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 |Z94@uB  
   step = 20, color = red, width = 3,"residual pump" "gJ.mhHX  
)ds]fvMW]N  
! set_L(L_f) {restore the original fiber length } z?.9)T9_  
'(FC  
\cCH/  
; ------------- E& i (T2c  
diagram 4:                                  ！输出图表4 ~HhB@G!3  
l=p_  
"TransverseProfiles" JJ7A` ;  
\Q(a`6U  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) P O 5Wi  
OPDT:e86Y=  
x: 0, 1.4 * r_co /um 'I&0$
<  
"radialposition (µm)", @x /0H}-i  
y: 0, 1.2 * I_max *cm^2 s$isDG#Sr  
"intensity (W/ cm&sup2;)", @y #55:qc>m  
y2: 0, 1.3 * N_Tm ofV0L
  
frame mf$YsvPq*+  
hx oG1zPspL  
hy '"E!av>  
I51]+gEN  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 F0p=|W  
  yscale = 2, 'z5jnI  
  color = gray, U,#x\[3!Jt  
  width = 3, EN\cwa#FU  
  maxconnect = 1, dh7`eAMY   
  "N_dop (right scale)" #| _VN %!  
_\X ,a5Un  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 q+\<%$:u  
  color = red, G|f9l?p  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 JkWhYP}  
  width = 3, &&9|;0<  
  "pump" }W8A1-UF  
W&Fm;m@M  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 p"p~Bx  
  color = blue, Sp5:R75vI  
  maxconnect = 1, N'VTdf?  
  width = 3, 6whPW .  
  "signal" }6%XiP|  
f(w>(1&/B  
qisvGHo  
; -------------  RbTGAA  
diagram 5:                                  ！输出图表5 {\D&
*  
h'-4nu;*  
"TransitionCross-sections" ?h&XIM(  
z1Bi#
/i  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) AE}cHBwZE  
g~y0,0'j1\  
x: 1450, 2050 ]5"k%v|  
"wavelength(nm)", @x 1v]%FC`  
y: 0, 0.6 =0d|F 8  
"cross-sections(1e-24 m&sup2;)", @y #j
~FlY5  
frame =WT$\KYGv  
hx =|z:wlOs  
hy y<Q"]H.CkQ  
bwXeEA@{  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 V'j+)!w5  
  color = red, 4n1g4c-   
  width = 3, d=xjLbsZ  
  "absorption" r)5xS]  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 .g*N+T6O  
  color = blue, m}wn+R  
  width = 3, *I(6hB  
  "emission" "5V;~}=S  
pz /[${X  

感谢，视频上有点看不清楚