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

(* tsck|;v  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ?Y%}(3y  
pumped at 790 nm. Across-relaxation process allows for efficient UP}feN  
population of theupper laser level. BO[+E'2  
*)            ！（*  *）注释语句 TFNUv<>X  
(qJIu  
diagram shown: 1,2,3,4,5  ！指定输出图表 WfRVv3Vm  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 u
.$Ym
  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 +8]W\<Kp  
; 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 n/xXQ7y  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 a:=q8Qy  
; 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 XAw2X;F%  
kZJt~}  
include"Units.inc"         ！读取“Units.inc”文件中内容 >Dk1axZ!>/  
izXbp02  
include"Tm-silicate.inc"    ！读取光谱数据 Tw2Xe S  
dz{#"No0  
; Basic fiberparameters:    ！定义基本光纤参数 `Q:de~+AM{  
L_f := 4 { fiberlength }      ！光纤长度 Qk?jGXB>^  
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;^y|0Nm  
r_co := 6 um { coreradius }                ！纤芯半径 | -JI`!7  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 >Kz_My9  
/TzNdIv  
; Parameters of thechannels:                ！定义光信道 .UNF~}^H  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm eLCdAr  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 AmP#'U5  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W f1)HHUB  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 5T~3$kuO  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 @<hF.4,]  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 kJHr&=VO~  
,lrYl!,  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm ,Y`'myL8W  
w_s := 7 um                          ！信号光的半径 hfJrQhmE  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 pGO|~:E/L  
loss_s := 0                            ！信号光寄生损耗为0 );0<Odw%.  
GwTT+  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 s]$HkSH  
N7d17c. 5  
; 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 pw0Px  
calc u)<Ysx8G  
  begin  Ask' !  
    global allow all;                   ！声明全局变量 b7?U8/#'  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 }v_p gatC  
    add_ring(r_co, N_Tm); C!oS=qK?]  
    def_ionsystem();              ！光谱数据函数 pWWL{@J  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 JoZqLy!@
 
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 2z'+1+B'  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 aQ.Iq  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 aO~si=  
    finish_fiber();                                   8 m%>:}o  
  end; h$E\2lsE  
kWzuz#  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 3!i.Fmo  
show "Outputpowers:"                                   ！输出字符串Output powers： yw;ghP;  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） '"!z$i~G=  
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） "6NFe!/Y$*  
_fczE~O/  
4^d+l.F  
; ------------- 1x~%Ydy  
diagram 1:                   !输出图表1 b:N^Fe
 
?b!CV   
"Powers vs.Position"          ！图表名称 bBkm] 
>  
[W^6u7~  
x: 0, L_f                      ！命令x: 定义x坐标范围 \>*MMe  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 F
K4nz2&4  
y: 0, 15                      ！命令y: 定义y坐标范围 u=p ;A1oy  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 71oFm1m{  
frame          ！frame改变坐标系的设置 R`0foSq \M  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ib5
;f0Qa  
hx             ！平行于x方向网格 ^CowJ(y(  
hy              ！平行于y方向网格 tIn7(C  
6F|Hg2tpz  
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 \iFMU#  
  color = red,  ！图形颜色 {]t\`fjrg  
  width = 3,   ！width线条宽度 ({;P#qCX  
  "pump"       ！相应的文本字符串标签 (lyt"Ty  
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 "D ts*  
  color = blue,     wMlf3Uz  
  width = 3, YtwmlIar`  
  "fw signal" U^E  
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 dWzDSlP&  
  color = blue, 4kW30Ma  
  style = fdashed, N0y;PVAGu  
  width = 3, -XS+Uv  
  "bw signal" nU
I63?  
uR06&SaA>  
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 _H~p
H7WU  
  yscale = 2,            ！第二个y轴的缩放比例 fZka%[B  
  color = magenta, ?$"x^=te7  
  width = 3, Hrd5p+j  
  style = fdashed, |'V<>v.v  
  "n2 (%, right scale)" wQo6!
H"K  
Zd[y+$>  
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 [?|l X$<  
  yscale = 2, tJ?qcT?  
  color = red, 2
pM  
  width = 3, "?2  
  style = fdashed, p6&LZ=tL3  
  "n3 (%, right scale)" p0}+071o%  
zh#OD{  
_1w.B8Lyz@  
; ------------- !#,-  
diagram 2:                    ！输出图表2 Vze!/ED  
kbIY%\QSO  
"Variation ofthe Pump Power" M-
&^   
'NQMZfz  
x: 0, 10 %:'1_@Ot2  
"pump inputpower (W)", @x }<5\O*kX4  
y: 0, 10 [3{:H"t  
y2: 0, 100 )[y!m9Vn  
frame mFgb_Cd  
hx K]H"qG.K  
hy 3<KZ.hr  
legpos 150, 150 G:h;C].  
gqO%^b)6  
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 KV^:sxU  
  step = 5, *7xQp!w^  
  color = blue, eLDL  "L  
  width = 3, PK.h E{R  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 (x1"uy7_  
  finish set_P_in(pump, P_pump_in) }6uV]V{  
zCj*:n  
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 ]Vf8mkDGO  
  yscale = 2, k2_6<v Z  
  step = 5, &dZ.+#8r  
  color = magenta, =B/s HN  
  width = 3, gNEzl
x8A  
  "population of level 2 (%, rightscale)", 9AVK_   
  finish set_P_in(pump, P_pump_in) DiGUxnP  
cjy0s+>>  
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 ${TB2q}%  
  yscale = 2, J#Ne:Aj_  
  step = 5, IxEQh)J X  
  color = red, EvH(Po h  
  width = 3, o3TBRn,  
  "population of level 3 (%, rightscale)", 43}&w.AS  
  finish set_P_in(pump, P_pump_in) hZss  
4Rrw8Bw  
3-9J"d!  
; ------------- HAI1%F236  
diagram 3:                         ！输出图表3 Ybn=Gy  
mTXNHvv  
"Variation ofthe Fiber Length" +X%fcoc  
st'?3A  
x: 0.1, 5 654jS!  
"fiber length(m)", @x e%@[d<Ta\  
y: 0, 10 R+ #.bQg  
"opticalpowers (W)", @y )K\k6HC.  
frame g`~lIt[=  
hx &23ss/  
hy Skk3M?  
W"}*Q-8W  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 PTI'N%W  
  step = 20,             soQv?4  
  color = blue, @|\s$L  
  width = 3, 6Ymo%OT  
  "signal output" qRP8dH  
zOu$H[  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 M*T# 5  
   step = 20, color = red, width = 3,"residual pump" *2m&?,nJ  
I8-&.RE  
! set_L(L_f) {restore the original fiber length } v;F+fOo  
`>Kk;`  
0R%uVJG  
; ------------- n4r( Vg1GS  
diagram 4:                                  ！输出图表4 BorfEv} SN  
u7y7  
"TransverseProfiles" R
=Ly49  
cnUU1Uz>  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ^kR^ QL$  
E*T84Jh6  
x: 0, 1.4 * r_co /um c&I,eds  
"radialposition (µm)", @x z_,]fd=o  
y: 0, 1.2 * I_max *cm^2 `w+9j-  
"intensity (W/ cm&sup2;)", @y $qyM X[  
y2: 0, 1.3 * N_Tm <hF~L k ,  
frame -
5-SlQu  
hx I3E8vi%B.  
hy :#&U95EC0  
'`goy%Wd  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 b8b PK<  
  yscale = 2, &40JN}  
  color = gray, ;|$]Qq  
  width = 3, ,LPFb6o  
  maxconnect = 1, RVKaqJ0e<  
  "N_dop (right scale)" u%IKM\  
pvwnza1  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 U+}9X^  
  color = red, 1.d9{LO[-  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 :c/=fWM%  
  width = 3, vM3|Ti>a'  
  "pump" `zsk*W1GA  
(XIq?c1T  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 d<cbp[3F  
  color = blue,  [;LPeO  
  maxconnect = 1, OFAqP1o{$  
  width = 3, O>):^$-K%  
  "signal" uu/7Ie  
;eEtdoy  
E~O>m8hF  
; ------------- xg5@;p  
diagram 5:                                  ！输出图表5 %Ja{IWz9L  
md +`#-D\O  
"TransitionCross-sections" fF]&{b~wk  
m=l3O:~J  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) /t6u"I~  
X1z0'gvh  
x: 1450, 2050 9M~$W-5  
"wavelength(nm)", @x Eq.zCD8A  
y: 0, 0.6 Pc ?G^ Xol  
"cross-sections(1e-24 m&sup2;)", @y 3$G25=eN  
frame V^5k>`A  
hx <.B> LU  
hy KZ/^gR\d  
2+Y`pz47W  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 tZBE& :l  
  color = red, Glc4g  
  width = 3, aTL7"Myp  
  "absorption" LUVJ218p  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 (2(;u1  
  color = blue, ~map5@Kd  
  width = 3, .0;k|&eBD  
  "emission" q9z!g/,d/  
0$h$7'a  

感谢，视频上有点看不清楚