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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

(* <<SUIY@X  
Demo for program"RP Fiber Power": thulium-doped fiber laser, `GpOS_;  
pumped at 790 nm. Across-relaxation process allows for efficient n)<S5P?  
population of theupper laser level. B=<Z@u  
*)            ！（*  *）注释语句 HxAN&g *:  
|T; ]%<O3E  
diagram shown: 1,2,3,4,5  ！指定输出图表 !T|q/ri  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 swTur  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 o9XT_!Cwg  
; 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 u3k{s  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 *+UgrsRk  
; 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 ~+)sL1lx  
yKhN1kY  
include"Units.inc"         ！读取“Units.inc”文件中内容 n OQvBc  
>WZ_) `R  
include"Tm-silicate.inc"    ！读取光谱数据 (DnrJ.QU}t  
]ZI ?U<0  
; Basic fiberparameters:    ！定义基本光纤参数 p"dK,A5#)  
L_f := 4 { fiberlength }      ！光纤长度 O{{\jn|lR  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 CG0jZB#u  
r_co := 6 um { coreradius }                ！纤芯半径 i]{-KZC  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 9j8<Fs0M  
tb1w 6jaU  
; Parameters of thechannels:                ！定义光信道 2mt S\bAF  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm }od5kK;  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 FhFP M)[  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W DGJt$o=&@  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um bm\Zp  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 ]n 'FD|  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 +FBUB  
\:5M0  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm S2\|bs7;J,  
w_s := 7 um                          ！信号光的半径 T!YfCw.HZ  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 YVW`|'7)|  
loss_s := 0                            ！信号光寄生损耗为0 &a9Y4~e::  
7i##g,  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 *=)kR7,]9d  
XIRvIwO  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 c?t,,\o(}  
calc mM;5UPbZ  
  begin 5<77o|  
    global allow all;                   ！声明全局变量 sMDHg  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 *1b1phh0/  
    add_ring(r_co, N_Tm); 2_C&p6VGj  
    def_ionsystem();              ！光谱数据函数 #HyE-|_C  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 v2KK%Qy  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ZD#{h J-  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Ch0t'  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 !g2 ~|G  
    finish_fiber();                                   B 4RP~^  
  end; zy\R>4i'#Q  
,b'QL6>`  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出  )k6O  
show "Outputpowers:"                                   ！输出字符串Output powers： *R_mvJlT  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） ~ \3j{pr  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） \wb0%> 0  
}HLV'^"k  
E%e2$KfD  
; ------------- 9~|hGo  
diagram 1:                   !输出图表1 uD8,E!\  
EF5:$#  
"Powers vs.Position"          ！图表名称 bKac?y~S_  
LQDU8[-  
x: 0, L_f                      ！命令x: 定义x坐标范围 p;P cD  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 ykBq?Vr  
y: 0, 15                      ！命令y: 定义y坐标范围 lr~c w#h*  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ATkx_1]KM-  
frame          ！frame改变坐标系的设置 qGhwbg  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） Br}0dha3E  
hx             ！平行于x方向网格 $guaUe[x  
hy              ！平行于y方向网格 i7|sVz=  
0`~#H1TK  
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 .3:s4=(f  
  color = red,  ！图形颜色 4&_|myO&  
  width = 3,   ！width线条宽度 ?:c:D5N  
  "pump"       ！相应的文本字符串标签 3c[< #] 8S  
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 p`T,VU&.  
  color = blue,     8iXt8XY3  
  width = 3, 2|:x_rcj  
  "fw signal" %WO4uOi:@  
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 b6ui&Y8z  
  color = blue, ~(Xzm  
  style = fdashed, f6U i~  
  width = 3, h%+6 y  
  "bw signal" WP ~]pduT  
%C =?Xhnv  
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 5"^Z7+6  
  yscale = 2,            ！第二个y轴的缩放比例 mY0FewwTy  
  color = magenta, NKRI|'Y,  
  width = 3, E0_S+`o2y  
  style = fdashed, yl UkVr   
  "n2 (%, right scale)" &A)u!l Ue  
+GFK!Pf  
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 {-.ZFUZmT  
  yscale = 2, f;cY&GC  
  color = red, pGT?=/=*  
  width = 3, ~F^7L5d}C  
  style = fdashed, "S^ ""5  
  "n3 (%, right scale)" 6sz:rv}  
)Nkf'&  
A#x_>fV  
; ------------- Q zq3{%^x_  
diagram 2:                    ！输出图表2 Q%.F Mf  
Cs?[   
"Variation ofthe Pump Power" u[+/WFH  
_6Qb 3tl  
x: 0, 10 #J|DW C!#d  
"pump inputpower (W)", @x [z> Ya-uz7  
y: 0, 10 0;SRmj@W  
y2: 0, 100 ~xakz BE  
frame WwAvR5jq  
hx LY1dEZ-)A  
hy apw/nhQ.[  
legpos 150, 150 4elA<<  
r"_SL!,^  
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 z!>ml3  
  step = 5, v|@1W Uc,g  
  color = blue, #-9@*FFL,  
  width = 3, 0.lOSAq  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 U?&&yynK  
  finish set_P_in(pump, P_pump_in) .V.ga2+  
CaqqH`/E4  
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 i;I!Jc_b'  
  yscale = 2, LR Dj!{k{  
  step = 5, hB??~>i3  
  color = magenta, rLx'.:  
  width = 3, 2{I+H'w8:  
  "population of level 2 (%, rightscale)", .g52p+Z#  
  finish set_P_in(pump, P_pump_in) o*Kl`3=]  
XO,gEn&6V  
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 @zi_@B  
  yscale = 2, y vo4 .u  
  step = 5, $Fik]TbQp  
  color = red, ,*j@Zb_r  
  width = 3, I_3{i`g  
  "population of level 3 (%, rightscale)", 1rGi"kdf  
  finish set_P_in(pump, P_pump_in) =x5k5NIF  
6y   
m 7/b.B}  
; ------------- qY$]^gS  
diagram 3:                         ！输出图表3 jrZH1dvE  
Zt"3g6S  
"Variation ofthe Fiber Length" 4">C0m;ks  
z,IUCNgM  
x: 0.1, 5 dO|n[/qL0  
"fiber length(m)", @x W}rLHAaDh  
y: 0, 10 'q, L*  
"opticalpowers (W)", @y /`VrV{\/!  
frame c'&\[b(m  
hx K} TSwY  
hy {<L|Z=&k`  
Ae|bAyAK  
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 h7cE"m  
  step = 20,             -cL wjI  
  color = blue, *!&,)''  
  width = 3, 8Q\ T,C  
  "signal output" ZZJ<JdD  
}CB9H$FkCY  
;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 =q?sB]n  
   step = 20, color = red, width = 3,"residual pump" tde&w=ec  
r>Cv@4/j  
! set_L(L_f) {restore the original fiber length } M:d} P  
26[m7\O  
9MUg/  
; ------------- Bl/Z _@  
diagram 4:                                  ！输出图表4 MVOWJaT(Aq  
^Q5advxuq  
"TransverseProfiles" $ nHf0.V1  
WI\jm&H r  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) NZ:KJ8ea"  
7O\Qxc\  
x: 0, 1.4 * r_co /um ~U<=SyZYo  
"radialposition (µm)", @x H rI(uZ]  
y: 0, 1.2 * I_max *cm^2 S- JD}+ 9  
"intensity (W/ cm&sup2;)", @y 9/$Cq  
y2: 0, 1.3 * N_Tm Tjj-8cg  
frame H.#zbKj  
hx $3yn-'o'A  
hy 0q_?<v_ 1  
{I]>!V0j!  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 0^mCj<g  
  yscale = 2, NXSjN~aG2  
  color = gray, jWcfQ  
  width = 3, y[d>7fcf  
  maxconnect = 1, z\c$$+t  
  "N_dop (right scale)" m)e~HP7M  
$64sf?aZ>#  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 OSIf>1  
  color = red, \.Z /  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 xy+hrbD)j  
  width = 3, 't'2z  
  "pump" K-4o_:F  
p"d_+  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 oN&U@N/>aU  
  color = blue, Hd?#^X  
  maxconnect = 1, U)] }EgpF  
  width = 3, UaXWHCm`  
  "signal" :YM1p&|fS  
V*H7m'za  
g![?P"i^t  
; ------------- 5m9;'SF  
diagram 5:                                  ！输出图表5 ~vB dq Yj  
iG+=whvL  
"TransitionCross-sections" 2}U:6w  
8om)A0S  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) V~]&1  
oL -udH  
x: 1450, 2050 *  \%b1  
"wavelength(nm)", @x }$@E pM  
y: 0, 0.6 A75z/O{  
"cross-sections(1e-24 m&sup2;)", @y e~PAi8B5  
frame A O3MlK9t  
hx $aDkZj  
hy 8B7~Nq'  
UNyk, #4  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 'pC51}[A{^  
  color = red, |SuN3B4e  
  width = 3, <Y+>a#T  
  "absorption" #r'S@:[  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 BjV;/<bt  
  color = blue, G!E1N(%o  
  width = 3, AQTV1f_  
  "emission" Y3bZ&G)  
%OJq(}  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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