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

(* |gv{z"  
Demo for program"RP Fiber Power": thulium-doped fiber laser, >aG=T{  
pumped at 790 nm. Across-relaxation process allows for efficient w{`Acu  
population of theupper laser level. a8Uk[^5  
*)            ！（*  *）注释语句 tuxRVV8l  
BSgTde|3y  
diagram shown: 1,2,3,4,5  ！指定输出图表 vd (?$  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ]JdJe6`Mc  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 6\n?48x}  
; 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 >b48>@~b
Y  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 <bUXC@3W  
; 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 z)}!e,7  
% 5z gd>  
include"Units.inc"         ！读取“Units.inc”文件中内容 "|t!7hC  
G;s"h%Xw98  
include"Tm-silicate.inc"    ！读取光谱数据 =K(JqSw+M  
#{*LvI&  
; Basic fiberparameters:    ！定义基本光纤参数 ?3q@f\fZ  
L_f := 4 { fiberlength }      ！光纤长度 3v1 7"  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 ){P^P!s$  
r_co := 6 um { coreradius }                ！纤芯半径 BpH%STEN  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 9I.^LZ"  
ag8`O&+  
; Parameters of thechannels:                ！定义光信道 Z\ )C_p\-  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm /t5p-  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 uel{`T[S  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W f~ZEdq8  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um ? ?[g}>  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 `PlOwj@u0`  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 ,j178
EX  
{C")#m-0  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm e |V]  
w_s := 7 um                          ！信号光的半径 C6jR=@42Q  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 ;>>C)c4V"  
loss_s := 0                            ！信号光寄生损耗为0 e2w&&B-  
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R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 aG{$I
c  
=&vFVIhWcf  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 .H~Y
I  
calc "2{%JFE  
  begin .L EY=j!-s  
    global allow all;                   ！声明全局变量 O{]9hm(tN  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 gzdG6"  
    add_ring(r_co, N_Tm); Vn|1v4U!  
    def_ionsystem();              ！光谱数据函数 RMP9y$~3pU  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 2@khSWV  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ke%pZ7{u  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 F)Oe9x\/  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 :O-1rD  
    finish_fiber();                                   }]6f+  
  end; Fvd
eQsc!  
"G?Yrh  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 (sTuG}  
show "Outputpowers:"                                   ！输出字符串Output powers： )L5i&UK.  
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） cWLqU  
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） ,}SCa'PB  
M.[
rLJZ4  
T!|=El>  
; ------------- ig!7BxM)<h  
diagram 1:                   !输出图表1 L'Q<>{;Ig  
=L]Q2V}  
"Powers vs.Position"          ！图表名称 dl~|Izm  
-e]7n*}H$  
x: 0, L_f                      ！命令x: 定义x坐标范围 '0Q,  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 bC6oqF'#  
y: 0, 15                      ！命令y: 定义y坐标范围 & ,hr8  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ~E5z"o6$  
frame          ！frame改变坐标系的设置 ;zH HIdQ>-  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） %)(Cp-b!  
hx             ！平行于x方向网格 & E}mX]t  
hy              ！平行于y方向网格 ZH 6\><My  
1iBP,:>*  
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 h6D^G5i  
  color = red,  ！图形颜色 )>a B  
  width = 3,   ！width线条宽度 nH-V{=
**  
  "pump"       ！相应的文本字符串标签 vVxD!EL  
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 G}nO@  
  color = blue,     cr;`Tl~}s  
  width = 3, ^Q}eatEn  
  "fw signal" 4JyM7ePND}  
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 S<wj*"|.s  
  color = blue, \cJa;WM>  
  style = fdashed, Rl~T$ Ey  
  width = 3, 3'`dFY,  
  "bw signal" 9 ;i\g=  
]d}0l6  
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 9i q""  
  yscale = 2,            ！第二个y轴的缩放比例 Kg\R+i@#<  
  color = magenta, b;cMl'  
  width = 3, #FxPj-3(ix  
  style = fdashed, pv)`%
<  
  "n2 (%, right scale)" ~FU@wV^  
kFLB> j97  
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 5 `/< v^  
  yscale = 2, DGESba\2+  
  color = red, |I;$M;'r&  
  width = 3, V@-)\RZm  
  style = fdashed, =n(3o$r(  
  "n3 (%, right scale)" C#0Qd%  
s#9Ui#[=h  
,E )|y4  
; ------------- ?/hZb"6W  
diagram 2:                    ！输出图表2 LPd\-S_rsP  
{-/^QX]6  
"Variation ofthe Pump Power" Dh4 6o|P  
2/ rt@{V(  
x: 0, 10 Z~  
"pump inputpower (W)", @x _l`e#XbG  
y: 0, 10 OX]V)QHVZ  
y2: 0, 100 >o,^b\  
frame R"v 3!P  
hx o`S?  
hy R\3VB NX.g  
legpos 150, 150 *jq7X  
"UFs~S|e  
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 Io`P,l:  
  step = 5, ZD/jX_!t  
  color = blue, 9p* gU[  
  width = 3, El
j_,z  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 2-*V=El  
  finish set_P_in(pump, P_pump_in) iSLGwTdLn  
] ]U<UJ  
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?T.p)  
  yscale = 2, ym,H@~  
  step = 5, 75T_Dx(H  
  color = magenta, p/Sbt/R  
  width = 3, Cs3^9m6;d  
  "population of level 2 (%, rightscale)", ]va>ex$d  
  finish set_P_in(pump, P_pump_in) e>rRTN  
EI~"L$?  
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 `$LWmm#  
  yscale = 2, Rgy-OA  
  step = 5, BAj-akc f  
  color = red, T VmH  
  width = 3, INs!Ame2  
  "population of level 3 (%, rightscale)", %q;jVj[  
  finish set_P_in(pump, P_pump_in) h5_G4J{1  
@Hb'8F  
1F8 W9b^D  
; ------------- u6V/JI}g  
diagram 3:                         ！输出图表3 `?g`bN`Vn  
}TQ{`a@  
"Variation ofthe Fiber Length" Y}*\[}l:&x  
U6Z
R->:  
x: 0.1, 5 lASL8O&\  
"fiber length(m)", @x N]EcEM#  
y: 0, 10 [S]S^ej*8  
"opticalpowers (W)", @y BcjP+$k4_  
frame ?^mi3VM  
hx x&Vm!,%:1  
hy @oF$LMD  
 9fnA   
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 ]?1Y e8>Y<  
  step = 20,             >Iewx G
b>  
  color = blue, >7`<!YJkK  
  width = 3, 1 2++RkL#  
  "signal output" sbkQ71T:  
enNiI$H]`_  
;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 1be %G [*  
   step = 20, color = red, width = 3,"residual pump" v0Dq@Q1  
r"2V  
! set_L(L_f) {restore the original fiber length } 4(neKr5\#  
-4w=s|#.\  
ne61}F"E  
; ------------- EpS(o>'  
diagram 4:                                  ！输出图表4 p^nL&yIW,%  
iqQUtE]E_  
"TransverseProfiles" aV o;~h~  
t>GfM  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) (BxJryXm  
aSuM2  
x: 0, 1.4 * r_co /um o*x*jn:hm  
"radialposition (µm)", @x l+V,DCE  
y: 0, 1.2 * I_max *cm^2 CM)Q&:  
"intensity (W/ cm&sup2;)", @y $WYbm}j  
y2: 0, 1.3 * N_Tm - K%,^6  
frame K3uG2g(>2  
hx "'8KV\/D  
hy x83 !C}4:  
lkyzNy9R  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 ^=n+T7"J  
  yscale = 2, (Rk_-9_E.  
  color = gray, f\+fo  
  width = 3, 9YsR~SM  
  maxconnect = 1, RjF'x  
  "N_dop (right scale)" ONNpiK-  
Q$obOEr2(  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 x:vu'A  
  color = red, <2!v(EkI  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 lf>*Y.!@me  
  width = 3, GU't%
[  
  "pump" ^JI o?R  
kt[:@Nda9  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 xvzr:pP  
  color = blue, J$4wL F3  
  maxconnect = 1, ;U1UFqZ`  
  width = 3, V._6=ZJ  
  "signal" T5Q{{@Q  
@prG%vb"  
<9=9b_z  
; ------------- O\K_q7iO6  
diagram 5:                                  ！输出图表5 BR'I+lQ  
j-CnT)W<  
"TransitionCross-sections" Tu{h<Zy  
$M_x!f'{>  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) @)kO=E d  
"'g[1Li  
x: 1450, 2050 f:g,_|JD$  
"wavelength(nm)", @x pE{yv1Yg  
y: 0, 0.6 OmM=o*d  
"cross-sections(1e-24 m&sup2;)", @y ]M)O YY  
frame 7iHK_\tn  
hx Q^p|Ldj  
hy Ggh.dZI4  
_3]][a,  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 Hk>79};  
  color = red, Oz|K8p  
  width = 3, &t5{J53  
  "absorption" $?,a
[79  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 UgWs{y2SE.  
  color = blue, ZKg{0DY  
  width = 3, )s1Ib4C  
  "emission" ,uzN4_7u  
]$
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感谢，视频上有点看不清楚