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

(* fk{0d  
Demo for program"RP Fiber Power": thulium-doped fiber laser, Apfnx7Fv  
pumped at 790 nm. Across-relaxation process allows for efficient 7x k|+!  
population of theupper laser level. <Ef[c@3  
*)            ！（*  *）注释语句 #g9ZX16}  
<]d
LX}C)  
diagram shown: 1,2,3,4,5  ！指定输出图表 :]II-$/8  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 C5X(U:  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 c$h9/H=
~  
; 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 3)N\'xFh@  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 -d=WV:G%e  
; 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 a9Y5  
y7lWeBnC  
include"Units.inc"         ！读取“Units.inc”文件中内容 tef^ShF]  
z&}-8JykH  
include"Tm-silicate.inc"    ！读取光谱数据 ^%<pJMgdF  
{C3Y7<  
; Basic fiberparameters:    ！定义基本光纤参数 T@Y
GB]*Y  
L_f := 4 { fiberlength }      ！光纤长度 C+N k"l9  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 {hdPhL  
r_co := 6 um { coreradius }                ！纤芯半径 +%0z`E\?M#  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ]?L
B?:6  
r'4:)~]s  
; Parameters of thechannels:                ！定义光信道 8e2?tmWM  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm A :e;k{J  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 j*R,m1e8  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W A9:NKY{z  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um D E/:['  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 CIC
[1,  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 I;MD>%[W,  
.~D>5 JnEk  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm s0"e'  
w_s := 7 um                          ！信号光的半径 ,kM)7!]N  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 osP\DiQ  
loss_s := 0                            ！信号光寄生损耗为0 sen=0SB/  
3$/ 4wH^  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 7hw .B'7  
dcfe_EuT  
; 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 LIpEQ7;  
calc %D=]ZV](  
  begin ,xsH|xW  
    global allow all;                   ！声明全局变量 pdVQ*=c?M  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 b[ w;i]2  
    add_ring(r_co, N_Tm); Ey`h1Y  
    def_ionsystem();              ！光谱数据函数 E-2eOT  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 8|g<X1H{M  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 1DJekiWf  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 AC- )BM';  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 LHYLC>J  
    finish_fiber();                                   c-4STPNQi  
  end; 4=<*Vd`p  
3
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; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 Xyx"A(v^l  
show "Outputpowers:"                                   ！输出字符串Output powers： kUl  
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）
N_gD>6I  
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） | A)\ :  
^TdZ*($5  
e":G*2a  
; ------------- k!L@GQ  
diagram 1:                   !输出图表1 *%FA:Y  
gE7L L=x  
"Powers vs.Position"          ！图表名称 5<YzalNf  
nms8@[4-  
x: 0, L_f                      ！命令x: 定义x坐标范围 t*S." q  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 M[]A2'fS  
y: 0, 15                      ！命令y: 定义y坐标范围 ['qnn|  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 :l u5Uu~  
frame          ！frame改变坐标系的设置 TLa]O1=Bf.  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） evuZY X@  
hx             ！平行于x方向网格 @mQ:7-,~  
hy              ！平行于y方向网格 _GYMPq\%L#  
_=XX~^I,  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 3R$Z[D-  
  color = red,  ！图形颜色 % ZU/x d  
  width = 3,   ！width线条宽度 b7:
0#l$  
  "pump"       ！相应的文本字符串标签 5]Ajf;W\  
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 $&I'o  
  color = blue,     }Fb!?['G5  
  width = 3, dFXc/VH')  
  "fw signal" Q;/a F`  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 9WG{p[  
  color = blue, (8a#
\Y[b  
  style = fdashed, {p<Zbm.  
  width = 3, [1G^/K"  
  "bw signal" K95;rd  
^%T7.1'x  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比  vb{i  
  yscale = 2,            ！第二个y轴的缩放比例 \%jVg\4'  
  color = magenta, i'/m4 !>h  
  width = 3, Rd*[%)  
  style = fdashed, @ EuFJ=h  
  "n2 (%, right scale)" cQNsL  
k=ytuV\  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 S_(d9GK<  
  yscale = 2, a}yXC<}$  
  color = red, QCOo  
  width = 3, |,C#:"z;  
  style = fdashed, .x83Ah`  
  "n3 (%, right scale)" 256LHY|6  
"\%On >  
>p\e0n  
; ------------- iI1n2>V3y  
diagram 2:                    ！输出图表2 sy* y\5yJ  
Y-!YhWsS  
"Variation ofthe Pump Power" $D1w5o-  
}GwVKAjP  
x: 0, 10 knp>m,w  
"pump inputpower (W)", @x A;XOT6jv?  
y: 0, 10 p zw8T  
y2: 0, 100 Nh?|RE0t  
frame DbI!l`Vn4  
hx fK}h"iH+K  
hy ;F:fM!l=  
legpos 150, 150 hS [SRa'.  
XKOUQ
c4!R  
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 n 1b(\PA
 
  step = 5, IXLO
>>`  
  color = blue,
@exey  
  width = 3, ed 59B)?l  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 zk_Eb?mhwV  
  finish set_P_in(pump, P_pump_in) K+\nC)oG  
x+5k <Xi}  
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 +\ _{x/u1  
  yscale = 2, {Bvj"mL]j  
  step = 5, }Rvm &?~O  
  color = magenta, H;ZHqcUX  
  width = 3, /hWd/H]  
  "population of level 2 (%, rightscale)", <E|s\u  
  finish set_P_in(pump, P_pump_in) >zvY\{WY  
+]xFoH  
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 0Wvq>R.(]7  
  yscale = 2, Ue:z1p;g  
  step = 5, >T3H qYX5W  
  color = red, l*aj#%ha  
  width = 3, Z [Xa%~5>5  
  "population of level 3 (%, rightscale)", FVsj;  
  finish set_P_in(pump, P_pump_in) <~emx'F|  
UM%o\BiO  
FwAKP>6*  
; ------------- \kIMDg3}  
diagram 3:                         ！输出图表3 Et2JxbD  
w?vVVA  
"Variation ofthe Fiber Length" ^ZeJ[t&!#  
9v)%dO.  
x: 0.1, 5 0BPMmk  
"fiber length(m)", @x 7v}x?I  
y: 0, 10 \{\MxXW  
"opticalpowers (W)", @y !eR3@%4  
frame m4w')r~  
hx &a)eJF]:!  
hy []W;t\h  
7k%T<;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 [U =Uo*  
  step = 20,             'X
OX@UH d  
  color = blue, M(q'%XL^  
  width = 3, ^n.WZUk  
  "signal output" \uOdALZ  
Tpp&  
;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 G* b2,9&F  
   step = 20, color = red, width = 3,"residual pump" A~(l{g  
u`:
hMFTID  
! set_L(L_f) {restore the original fiber length }  =1;=
 
SjEAuRDvUz  
H4-qB Z'  
; ------------- ^nK7i[yF.k  
diagram 4:                                  ！输出图表4 :6kj
EI  
4\5uY  
"TransverseProfiles" eLD?jTi'  
.ae O}^  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) (n{wg(R  
*!e(A ]&  
x: 0, 1.4 * r_co /um `\|ssC8u  
"radialposition (µm)", @x `D5HC  
y: 0, 1.2 * I_max *cm^2 i7[uL
dQ  
"intensity (W/ cm&sup2;)", @y ]<uQ.~  
y2: 0, 1.3 * N_Tm AN:@fZ  
frame )QiQn=Ce  
hx K!AAGj`  
hy JOnyrks  
lG<hlYckv  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 YA(@5CZ  
  yscale = 2, #<7O08:
 
  color = gray, #!J(4tXny  
  width = 3, 'rP]Nw  
  maxconnect = 1, |dE -^"_  
  "N_dop (right scale)" {Z;t ^:s#  
#1-xw~_  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 5x2Ay=s  
  color = red, ?wpB
`  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 &:*q_$]Oz  
  width = 3, 3*S{;p  
  "pump" _1Z=q.sC  
]LPQYL  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 v0*N)eqDGd  
  color = blue, O!1Tth
I  
  maxconnect = 1, v`q\6i[-  
  width = 3, RH;:9_*F  
  "signal" 0pe3L  
0Sl]!PZR1  
1[nG}  
; ------------- }}{!u0N},V  
diagram 5:                                  ！输出图表5 M<?Q4a'Q  
cvsz%:Vs  
"TransitionCross-sections" }S_oH9A  
cX!Pz.C  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) >
:sUL<p  
qUF'{K   
x: 1450, 2050 SJ' % ^  
"wavelength(nm)", @x 5__+_hO ;3  
y: 0, 0.6 em@EDMvI  
"cross-sections(1e-24 m&sup2;)", @y Jhkvd<L8`m  
frame Vsq8H}K  
hx }w-
wSkl1  
hy G)=HB7u[a  
(AY9oei>  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 fg%&N2/(.B  
  color = red, p 5u_1U0  
  width = 3, kQdt}o])  
  "absorption" V)o,1  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 6&v?)o  
  color = blue, 0O!cN_l|  
  width = 3, yTM{|D]$(  
  "emission" FXKF\1`(H  
~o3Hdd_#}N  

感谢，视频上有点看不清楚