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小火龙果 2020-05-28 16:28

RP Fiber Power仿真设计掺铥光纤激光器代码详解

(* CyR`&u  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ~*7$aj  
pumped at 790 nm. Across-relaxation process allows for efficient =4MTb_  
population of theupper laser level. )`rD]0ua;  
*)            ！（*  *）注释语句 q@~g.AMCB  
]5jS6 @Vl*  
diagram shown: 1,2,3,4,5  ！指定输出图表 Q3ty K{JE  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 U@NCN2 I  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 q4[8\Ua  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 ]B,tCBt  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 ,_u7@Ix  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 JY2<ECO  
a$|U4Eqo  
include"Units.inc"         ！读取“Units.inc”文件中内容 (O{OQk;CF  
0TmEa59P  
include"Tm-silicate.inc"    ！读取光谱数据 w2.] 3QAZ  
-y-}g[`  
; Basic fiberparameters:    ！定义基本光纤参数 3/`BK{  
L_f := 4 { fiberlength }      ！光纤长度 ,fp+nu8,  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 )]j3-#  
r_co := 6 um { coreradius }                ！纤芯半径 J)YlG*  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 Jz` jN~  
[*^.$s(  
; Parameters of thechannels:                ！定义光信道 &N^~=y^`C'  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm D+3?p  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 Cw+boB_tip  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W m "9f(  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um bI &<L O  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 OP1` !P y  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 Cq!eAc  
ZU`9]7"87B  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm d$3rcH1  
w_s := 7 um                          ！信号光的半径 Ncz4LKzt  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 @}H u)HO  
loss_s := 0                            ！信号光寄生损耗为0 #gQn3.PX+y  
'hjEd.  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 oIE 1j?  
wnokP  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 H7X-\K 1w  
calc P`lv_oV  
  begin |T6K?:U7  
    global allow all;                   ！声明全局变量 ?gMx  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 }qiZ%cT.G  
    add_ring(r_co, N_Tm); J =^IS\m  
    def_ionsystem();              ！光谱数据函数 Q]K` p(  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 mLuNl^)3  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 aj`&ca8  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 2|>\A.I|=  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 0$)Q@#  
    finish_fiber();                                   !"F;wg$  
  end; @PvO;]]%  
+]%S}<R  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 zL yI|%KH  
show "Outputpowers:"                                   ！输出字符串Output powers： h9Far8}  
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） TN0KS]^A3  
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） ~</FF'Xz  
,s~l; Gkj  
Mh7m2\fLbd  
; ------------- m8fj\,X  
diagram 1:                   !输出图表1 N_c44[z 1  
2$Mnwxfk  
"Powers vs.Position"          ！图表名称 V\Cl""`XN  
({!!b"B2  
x: 0, L_f                      ！命令x: 定义x坐标范围 cj[b^Wv:  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 &zJI~R  
y: 0, 15                      ！命令y: 定义y坐标范围 1tNL)x"w  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 }Ja-0v)Wf  
frame          ！frame改变坐标系的设置 %l7[eZ{Y  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） DC8#b`j  
hx             ！平行于x方向网格 8zx]/ >  
hy              ！平行于y方向网格 cT'Bp)a  
N1~bp?$1  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 OMLU ;,4  
  color = red,  ！图形颜色 8TP$?8l  
  width = 3,   ！width线条宽度 Yj&Sb  
  "pump"       ！相应的文本字符串标签 (TT=i  
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 x0<;Rm [u=  
  color = blue,     1b9S";ct0  
  width = 3, Fv~lasW[  
  "fw signal" q| D5 A|)  
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 huC{SzXM  
  color = blue, '3l TI  
  style = fdashed, ,clbD4  
  width = 3, zq};{~u(  
  "bw signal" )7 p" -  
Ce}`z L  
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 R0-0  
  yscale = 2,            ！第二个y轴的缩放比例 DhM=q  
  color = magenta, 40kAGs>_  
  width = 3, sq'm)g  
  style = fdashed, VExhN';  
  "n2 (%, right scale)" jSem/;  
XJ<"S p  
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 0/Q_% :  
  yscale = 2, ='m$ O  
  color = red, SxRJ{m~  
  width = 3, & BPYlfB1  
  style = fdashed, W[&nQW$E  
  "n3 (%, right scale)" C7%R2>}?f  
(e7!p=D  
o,rF15  
; ------------- 5T;LWS  
diagram 2:                    ！输出图表2 {xTq5`&gT  
0>|q[SC  
"Variation ofthe Pump Power" c-$rB_t+  
F1yn@a "=J  
x: 0, 10 qf0pi&q  
"pump inputpower (W)", @x :=NXwY3~M  
y: 0, 10 g6Vkns4  
y2: 0, 100 \ja6g  
frame #<0Hvde  
hx bg zd($)u  
hy | 1B0  
legpos 150, 150 -N' (2'  
KTm^}')C8  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 M}|(:o3Yo  
  step = 5, #z(:n5$F  
  color = blue, | xB`cSu(  
  width = 3, Ij#mmj NW  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 x@  =p  
  finish set_P_in(pump, P_pump_in) v<1@"9EH  
)U\i7[k>  
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 oKn$g[,SJh  
  yscale = 2, *Dg@fxCQ  
  step = 5, &[d'g0pF  
  color = magenta, d'_q9uf'  
  width = 3, d8wGXNd7B  
  "population of level 2 (%, rightscale)", Exw d,2>  
  finish set_P_in(pump, P_pump_in) /4r2B. 91O  
#ZZe*B!s_  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 `:C1Wo^<  
  yscale = 2, j3sz"(  
  step = 5, &y_t,8>5  
  color = red, &;$uU  
  width = 3, =zn'0g, J4  
  "population of level 3 (%, rightscale)", s\d3u`G  
  finish set_P_in(pump, P_pump_in) Gpu[<Z4  
n{QyqI  
mlByE,S2E  
; ------------- .F ?ww}2p]  
diagram 3:                         ！输出图表3 8#QT[H 4F  
':4ny]F  
"Variation ofthe Fiber Length" *8)?ZZMM  
?i<l7   
x: 0.1, 5 >v,X:B?+FL  
"fiber length(m)", @x m'2F#{  
y: 0, 10 "r6qFxY  
"opticalpowers (W)", @y 1sXCu|\q  
frame U.TZd"  
hx *9n[ #2sM<  
hy `he# !"  
Q h@Q6  
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 'ON/WKJr|W  
  step = 20,             WoXAOj%iW  
  color = blue, g+o$&'\  
  width = 3, 8$-MUF,  
  "signal output" x)?V{YAL  
ewcFzlA@  
;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 e,OXngC  
   step = 20, color = red, width = 3,"residual pump" :Ou~?q%X  
$@VJ@JAe  
! set_L(L_f) {restore the original fiber length } OXLB{|hH80  
/[6wm1?!  
xiW}P% bf  
; ------------- 7O)ATb#up  
diagram 4:                                  ！输出图表4 ~ T}D#}  
TY]0aw2]|7  
"TransverseProfiles" \B')2phE  
?Z|y-4 &>  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) }<G a e5  
"pt[Nm76)8  
x: 0, 1.4 * r_co /um .yF-<Y  
"radialposition (µm)", @x O[Z$~  
y: 0, 1.2 * I_max *cm^2 NL.3qx  
"intensity (W/ cm&sup2;)", @y _U}|Le@ e  
y2: 0, 1.3 * N_Tm l4kqz.Z-g  
frame @IL@|Srs8  
hx k8E2?kbF  
hy ydD:6bBX  
YEV;GFI1  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 Wda?$3!^q  
  yscale = 2, x6>WvF Z  
  color = gray, T \34<+n1N  
  width = 3, tLJ 7tnB  
  maxconnect = 1, u9;3Xn8  
  "N_dop (right scale)" jGLmgJG-P  
->|eMV'd  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 8k{XUn  
  color = red, Q-, 4  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 o<b  
  width = 3, nILUo2e~  
  "pump" f$ /C.E  
:V8oWMY  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 v*excl~  
  color = blue, 2;:]Q.g  
  maxconnect = 1, uYTyR;a  
  width = 3, Y+S<?8pA  
  "signal" je\]j-0$u  
:qXREF@h  
tklS=R^Vn  
; ------------- 0lt1/PEKx2  
diagram 5:                                  ！输出图表5 =[4C[s  
 t":^:i'M  
"TransitionCross-sections" d}E6d||A  
3Mh_ &%!O  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) D{]w +  
,DKW_F|  
x: 1450, 2050 CNiJuj`  
"wavelength(nm)", @x x=JZ"|TE  
y: 0, 0.6 Md:*[]<~  
"cross-sections(1e-24 m&sup2;)", @y L#vk77  
frame OwC{ Ad{  
hx #SLi v  
hy ;XY#Jl>tg  
{KqW<X6Hp  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 @)ozgs@e  
  color = red, "gpfD-BX  
  width = 3, w4y ???90)  
  "absorption" ku v<  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 Y0'~u+KS`5  
  color = blue, b4^a zY  
  width = 3, 1 xrmmK  
  "emission" D5T0o"A  
7Il /+l(  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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