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

(* ^NJ]~h{n$  
Demo for program"RP Fiber Power": thulium-doped fiber laser, KTn,}7vZ  
pumped at 790 nm. Across-relaxation process allows for efficient lB!`,>"c  
population of theupper laser level. ( Lj{V}^  
*)            ！（*  *）注释语句 +|.}oL^}G  
"|W .o=R  
diagram shown: 1,2,3,4,5  ！指定输出图表 K/RQ-xd4  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 PfX{n5yBW8  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 X!5N2x  
; 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 R'a%_sACj>  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 "=4`RM  
; 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 pAS!;t=n,  
ZJ(/cD  
include"Units.inc"         ！读取“Units.inc”文件中内容 :T~Aa(%(  
$q*kD#;mh  
include"Tm-silicate.inc"    ！读取光谱数据 h&4ufx6  
V~LZ%NZ8  
; Basic fiberparameters:    ！定义基本光纤参数 &pwSd  
L_f := 4 { fiberlength }      ！光纤长度 G yZYP\'S+  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 8+vZ9!7  
r_co := 6 um { coreradius }                ！纤芯半径 )#-27Y  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 "sLdkd}dj  
T!$7:% D  
; Parameters of thechannels:                ！定义光信道 =jD[A>3I  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm 1@IRx{v$  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 OJE<2:K  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W Wz$%o'OnC  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um d7N;Fa3yL  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 XfA3Ez,}  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 `}o4&$  
Z:f0>  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm WtI1h`Fo  
w_s := 7 um                          ！信号光的半径 ?7-#iC`  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Mq) n=M  
loss_s := 0                            ！信号光寄生损耗为0 :1u>T3L.z  
7SzY0})<U  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 i} 96,{  
/^96|  
; 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 -Hzn7L  
calc ^B@4 w
\t  
  begin 3ojK2F(1D  
    global allow all;                   ！声明全局变量 Cw?AP6f%  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 o;Ijv\Em  
    add_ring(r_co, N_Tm); RAKQ+Y"nl  
    def_ionsystem();              ！光谱数据函数 A/N*Nc  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 XuJwZN!(  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 P Y +~,T2  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 LLmgk"  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Wm:3_C +j  
    finish_fiber();                                   H
%7V)"  
  end;
kF'^!Hp  
7ka^y k@Q  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 G B!3` A%&  
show "Outputpowers:"                                   ！输出字符串Output powers： @RotJl/>  
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） c?) pn9  
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） =f@O~nGm  
)ufHk  
_yjM_ALjo  
; ------------- T\c;Ra  
diagram 1:                   !输出图表1 Orh5d7+S  
$}oQ=+c5  
"Powers vs.Position"          ！图表名称 L5T)_iQ5  
*F:]mgg  
x: 0, L_f                      ！命令x: 定义x坐标范围 Wy#`*h,  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 r0G#BPgdR  
y: 0, 15                      ！命令y: 定义y坐标范围 Af=%5%  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围
j>&n5?
 
frame          ！frame改变坐标系的设置 `'Ta=kd3  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） XBhWj\`(T  
hx             ！平行于x方向网格 ZJ"*A+IJx[  
hy              ！平行于y方向网格 /6{`6(p  
w GZ(bKyO  
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 {EJVZG:&  
  color = red,  ！图形颜色 ?3SlvKI}H`  
  width = 3,   ！width线条宽度 1ISA^< M  
  "pump"       ！相应的文本字符串标签 }#!o^B8  
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 CW\o>yh  
  color = blue,     &Wd,l$P<O  
  width = 3, PkDL\Nqe  
  "fw signal" u-U
UF  
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 iN<5[ztd  
  color = blue, ^S ,E"Q  
  style = fdashed, SNvK8,"g  
  width = 3, ("/*k  
  "bw signal" u MzefRN  
"EEE09~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 qjR;c& qR  
  yscale = 2,            ！第二个y轴的缩放比例 EfDo%H^!j  
  color = magenta, D\({]oj]  
  width = 3, W<!q>8Xn?  
  style = fdashed, 6}iIK,Om  
  "n2 (%, right scale)" %h
|z)  
gY0*u+LF  
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 bDUGzezP<  
  yscale = 2, `m2F.^qrr  
  color = red, /bCrpcH  
  width = 3, 3kR- WgVF,  
  style = fdashed, eBU\&z[  
  "n3 (%, right scale)" ]`m|A1(  
p00\C  
)Xd=EWGUS  
; ------------- );))kYr  
diagram 2:                    ！输出图表2 d,<ctd  
Dj!J 4uD  
"Variation ofthe Pump Power" =m}{g/Bk  

Ix:aHl  
x: 0, 10 *otJtEI>6  
"pump inputpower (W)", @x PtgUo,P  
y: 0, 10 &}T`[ d_Z  
y2: 0, 100 ?rBj{]=  
frame AZl=w`;/O%  
hx 7%7_i%6wP  
hy |:!0`p{R  
legpos 150, 150 iZjvO`@[  
EXJ>Z  
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 4D58cR}  
  step = 5, c"
O\fX  
  color = blue, 2A`EFk7_X  
  width = 3, JC=Bxv  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 k(^zhET  
  finish set_P_in(pump, P_pump_in) %J|EDf,M  
+!_^MBkk  
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 WO)K*c1F  
  yscale = 2, XLmbpEh  
  step = 5, f2{4Y)  
  color = magenta, Ro-Mex2  
  width = 3, ];uvE? 55  
  "population of level 2 (%, rightscale)", V7lDuiAI  
  finish set_P_in(pump, P_pump_in) k.lnG5e  
c7iu[vE'+  
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 u8?ceM^r  
  yscale = 2, %{HqF>=~  
  step = 5, 'kh%^_FH7  
  color = red, r`S]`&#}(  
  width = 3, hlUF9
}  
  "population of level 3 (%, rightscale)", RIJBHOa  
  finish set_P_in(pump, P_pump_in) '|]zBpz  
%djx0sy  
H<NYm#a"  
; ------------- 3}h&/KN{  
diagram 3:                         ！输出图表3 _&dGo(B  
Zb9@U: \  
"Variation ofthe Fiber Length" x&9I2"  
;bA
y7  
x: 0.1, 5 Y^6=_^  
"fiber length(m)", @x 5X`.2q=d  
y: 0, 10 D6ck1pxkx  
"opticalpowers (W)", @y zM@iG]?kc  
frame =
} vG|  
hx 4uu*&B  
hy rBny*!n  
ho(Y?'^t3  
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 Cog:6Gnw  
  step = 20,             T.(SBP  
  color = blue, Jhj]rsGk  
  width = 3, Jp= (Q]ab  
  "signal output" o&CvjE  
94a_ W9  
;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 ZDVaKDqZ_  
   step = 20, color = red, width = 3,"residual pump" hqBwA1](a  
1i>)@{P&BN  
! set_L(L_f) {restore the original fiber length } S((8DSt*  
}Ns_RS$  
G
B !3Z  
; ------------- yqBu7E$X  
diagram 4:                                  ！输出图表4 T4f:0r;^f*  
}>OE"#si  
"TransverseProfiles" %2L9kw'  
K^>qn,]H'  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 'rF TtT  

keWgbj  
x: 0, 1.4 * r_co /um ,2cw9?<  
"radialposition (µm)", @x /0\pPc*kA{  
y: 0, 1.2 * I_max *cm^2 Fj&vWj`*  
"intensity (W/ cm&sup2;)", @y un/eS-IIh  
y2: 0, 1.3 * N_Tm ,J~1~fg89  
frame WI
6er;D  
hx jG^~{7#  
hy #/ 4Wcz<  
sV+>(c-$  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 '+eP%Y[W%  
  yscale = 2, C9nNziws  
  color = gray, P#0_  
  width = 3, V*TG%V -  
  maxconnect = 1, 6S&#8l  
  "N_dop (right scale)" D{4 Y:O&J  
z7K?rgH  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 Qz<-xe`o8]  
  color = red, m&%N4Q~X>  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 vd;wQ  
  width = 3, 81n%2G  
  "pump" ]I]dwi_g)  
/# eBDo  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Y9%yjh  
  color = blue, @2u<Bh}}  
  maxconnect = 1, 0hv[
Ff  
  width = 3, Iq5F^rH`[  
  "signal" '|cuVxcE55  
af_zZf!0  
F+6ZD5/  
; ------------- pQ/:*cd+M  
diagram 5:                                  ！输出图表5 K4rr.f6  
K1hw'AaQ  
"TransitionCross-sections" s,}<5N]U  
Kzm_AHA)  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ::R^ w"  
@<2pYIi8  
x: 1450, 2050 w Vof_'F1  
"wavelength(nm)", @x :Hd<S  
y: 0, 0.6 kal8k-$#  
"cross-sections(1e-24 m&sup2;)", @y 2iGRw4`_a  
frame nFP2wvFM  
hx M{S7ia"s  
hy dnx}c4P  
V?"^Ff3m!  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 vW_A.iI"e  
  color = red, ^Y&Cm.w  
  width = 3, 0L1P'*LRU  
  "absorption" Cb13Qz  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系  Ntqc=z  
  color = blue, pFK |4
u  
  width = 3, j\vK`.z  
  "emission" 8x{vgx @M  
l=oVC6C  

感谢，视频上有点看不清楚