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

(* MX
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Demo for program"RP Fiber Power": thulium-doped fiber laser, K?6#jT6#  
pumped at 790 nm. Across-relaxation process allows for efficient .9!?vz]1  
population of theupper laser level. h 6juX'V  
*)            ！（*  *）注释语句 )KKmV6>b  
ok/{ w  
diagram shown: 1,2,3,4,5  ！指定输出图表 {Z1^/Fv3  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 }TG=ZVi  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 'a=' (,%  
; 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 ]dL#k>$0q  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 ]]50c  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 *eAzk2  
-aQf(=  
include"Units.inc"         ！读取“Units.inc”文件中内容 \s_`ZEB  
?dY|,_O  
include"Tm-silicate.inc"    ！读取光谱数据 6$ ag<  
)BmO[
AiOM  
; Basic fiberparameters:    ！定义基本光纤参数 jbTsrj"g  
L_f := 4 { fiberlength }      ！光纤长度 +J7xAyv_Oz  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 &5Huv?^a'  
r_co := 6 um { coreradius }                ！纤芯半径 ,rWej;CzN  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 v|wO qS  
cc:,,T/i  
; Parameters of thechannels:                ！定义光信道 TSUT3'&~p  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm Z?)=4|  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 =4804N7  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W c63yJqiW  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um R_B`dP<"~Y  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 /yFs$t>9  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 -P-&]F5  
c. 06Sw*  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm \pVWYx  
w_s := 7 um                          ！信号光的半径 ,L$,d  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 CQ:38l\`gd  
loss_s := 0                            ！信号光寄生损耗为0 b
>f{o_  
x?RYt4S  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 s'=w/os  
ObSRd$M  
; 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 e<r}{=1w  
calc ;}4^WzmK^(  
  begin o>o! -uf  
    global allow all;                   ！声明全局变量 3pjK`"Nmz\  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 y28 e=i  
    add_ring(r_co, N_Tm); VTJxVYE  
    def_ionsystem();              ！光谱数据函数 yR[htD`  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 =k:yBswi  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 YOQ>A*@4  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 `R,g_{Mj  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 WO{ET  
    finish_fiber();                                   :bu]gj4e  
  end; zaG1  
8 EUc 6  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 Ms14]M[\  
show "Outputpowers:"                                   ！输出字符串Output powers： rVv4R/3+   
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） WFG`-8_e[I  
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） KYR64[1  
\7] SG  
D ]G=sYt  
; ------------- 9;R'Xo=y  
diagram 1:                   !输出图表1 G1G*TSf  
:4/37R(~l8  
"Powers vs.Position"          ！图表名称 u:M)J
G  
/<Yz;\:Jy  
x: 0, L_f                      ！命令x: 定义x坐标范围 Zk>#T:{h  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 CZw]@2/JuQ  
y: 0, 15                      ！命令y: 定义y坐标范围 aM|;3j1p  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 yhh\?qqy  
frame          ！frame改变坐标系的设置 n>W*y|UJ  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 0{qe1pb w  
hx             ！平行于x方向网格 IM=3n%6  
hy              ！平行于y方向网格 f]48>LRE8  
]? %*3I  
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 =H;F{J"  
  color = red,  ！图形颜色 % 9} ?*U  
  width = 3,   ！width线条宽度 _p;=]#+c&  
  "pump"       ！相应的文本字符串标签 D]+]Br8  
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 FgnPh%[u  
  color = blue,     )<[)7`  
  width = 3, Mq52B_  
  "fw signal" &*#Obv  
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 +{L=cWA"  
  color = blue, 'J_`
CS  
  style = fdashed, 7~!F3WT{  
  width = 3, #D-Ttla  
  "bw signal" u#nM_UJe  
&n~v;M  
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 ;}}k*< Z  
  yscale = 2,            ！第二个y轴的缩放比例  >G}g=zy@  
  color = magenta, 85qD~o?O  
  width = 3, C9^C4   
  style = fdashed, i)= \-C  
  "n2 (%, right scale)" v
\dP  
#83pitcc  
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 /@Ec[4^=!.  
  yscale = 2, Cq[<CPAS  
  color = red, s2"<<P[q'  
  width = 3, 8c%_R23  
  style = fdashed, 5+[ 3@  
  "n3 (%, right scale)" d-`z1'  
dU&hM<.|  
\S0QZQbz/  
; ------------- xjh(;S'  
diagram 2:                    ！输出图表2 Kp>fOe'KW  
`y$@zT?j  
"Variation ofthe Pump Power" J~|:Q.Rt`  
_~bG[lX!  
x: 0, 10 w5;d/r<q  
"pump inputpower (W)", @x W~j>&PK,?  
y: 0, 10 YK>?;U+|  
y2: 0, 100 Y3O/`-9i  
frame _K3;$2d|R  
hx sFw;P`  
hy y
q12"Rs  
legpos 150, 150 (?1
/\r  
5#~E[dr  
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 eI1C0Uz1  
  step = 5, ]JHInt  
  color = blue, 4}NCdGD  
  width = 3, ;s?,QvE{r#  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 $S/EINc  
  finish set_P_in(pump, P_pump_in) RMlx[nsq  
.*
&F  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响
X3m)  
  yscale = 2, Y'yGhpT~  
  step = 5, @T%8EiV  
  color = magenta, /_r`A  
  width = 3, Bdm05}c@u  
  "population of level 2 (%, rightscale)", ]h'*L`  
  finish set_P_in(pump, P_pump_in) X*t2h3"}  
mD7kOOMY  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 lBLL45%BIN  
  yscale = 2, up2wkc8  
  step = 5, UN|S!&C$  
  color = red, F#a'N c9  
  width = 3, c~u91h?  
  "population of level 3 (%, rightscale)", dg#w!etB  
  finish set_P_in(pump, P_pump_in) 6|QIzs<Z-X  
t:YMF$Z  
 ?%*p!m  
; ------------- X'p%K/-m  
diagram 3:                         ！输出图表3 lJt?0;gn  
yM*_"z!L  
"Variation ofthe Fiber Length" *BKIA  
(Q"~bP{F  
x: 0.1, 5 bzh:  
"fiber length(m)", @x l:*.0Tj  
y: 0, 10 Mp06A.j[  
"opticalpowers (W)", @y 2E0oLl[  
frame uOPLJ?%  
hx uQg&]bSv  
hy yT
[)V[}  
@b{$s  
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 o @nsv&i  
  step = 20,             cUTG! P\R  
  color = blue, {T3~js   
  width = 3, {
dwlW`{  
  "signal output" .9q`Tf  
?~<NyJHN%  
;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 u<EPK*O*  
   step = 20, color = red, width = 3,"residual pump" 6S^JmYq  
EP{/]T  
! set_L(L_f) {restore the original fiber length } Wa9yyc  
i4mP*RwC  
/|@~:5R5H  
; ------------- ]xPy-j6C  
diagram 4:                                  ！输出图表4 DJ`xCs!R  
d?aZk-|c  
"TransverseProfiles" ,,;vG6^a  
;_m;:<  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) :A5h<=[  
uG(XbDZZ1W  
x: 0, 1.4 * r_co /um o@ @|4 F  
"radialposition (µm)", @x ;<#=|eD2  
y: 0, 1.2 * I_max *cm^2 9JO1O:W  
"intensity (W/ cm&sup2;)", @y Tj
6kCB  
y2: 0, 1.3 * N_Tm XQZiJ %'  
frame Y^eF(  
hx p MR4]G  
hy C)ic;!$Qhb  
X?Or.  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 lD$\t/8B  
  yscale = 2, 8d(l)[GZt  
  color = gray, );{76  
  width = 3, @ X5#?  
  maxconnect = 1, oiQ:&$y  
  "N_dop (right scale)" DS;.)P"  
u56F;y  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 eQ<GNvm  
  color = red, bSa]={}L(  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 GjbOc   
  width = 3, nI/kX^Pd  
  "pump" Rg3g:TV9c  
rq:sy=;  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 ;f /2u  
  color = blue, Zi<(>@z2  
  maxconnect = 1, on 4 $n7  
  width = 3, 9r ](/"=f  
  "signal" gps.  
5>h/LE]"  
Qe`Nb4xf  
; ------------- x^McUfdr|  
diagram 5:                                  ！输出图表5 X39%O'  
q siV  
"TransitionCross-sections" yUs/lI, Q  
2\CZ"a#[  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) `bWc<
4T  
er<_;"`1  
x: 1450, 2050 y0'WB`hNQ  
"wavelength(nm)", @x E5\>mf ,;u  
y: 0, 0.6 n(_wt##wE~  
"cross-sections(1e-24 m&sup2;)", @y =69sWcC8  
frame ?(M]'ia{  
hx $?On,U  
hy lU.aDmy<  
/sSM<r]5j  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 t-Ble  
  color = red, 6n H'NNS:J  
  width = 3, %!R\-Vej  
  "absorption" Nx!7sE*b$1  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系  ~;uU{TT  
  color = blue, ?8)k6:  
  width = 3, d"S\j@  
  "emission" df/7u}>9  
rd,!-
w5  

感谢，视频上有点看不清楚