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

(* {vZAOz7#  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ELG9ts+5Uj  
pumped at 790 nm. Across-relaxation process allows for efficient 2"%f:?xV{  
population of theupper laser level. [;ZC_fD  
*)            ！（*  *）注释语句 *X}2  
M-q5Jfm  
diagram shown: 1,2,3,4,5  ！指定输出图表 n.R"n9v`  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响  !$!%era`  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 ]<c\+9  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 ?5,I`9  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 tDfHO1pS  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 )UVekkq>Q  
^!n|j]aw  
include"Units.inc"         ！读取“Units.inc”文件中内容
/WLZyT2  
#v9+9X`1L  
include"Tm-silicate.inc"    ！读取光谱数据 >m{>0k(^`  
8F's9c,  
; Basic fiberparameters:    ！定义基本光纤参数 "pH;0
[r]  
L_f := 4 { fiberlength }      ！光纤长度 _#{qDG=  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注  3SPXJa\i  
r_co := 6 um { coreradius }                ！纤芯半径 i'^! SEt  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 
#uCfXJ-  
UFUEY/q  
; Parameters of thechannels:                ！定义光信道 bka%W@Y%  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm OK47Q{.gh  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 J |U
FuD  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W *&R|0I{>  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um {MDM=;WP_  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 B7.&yXWgn  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 {k[dg0UV  
xe3Jxo!U  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm #uICHt3  
w_s := 7 um                          ！信号光的半径 5j9%W18  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 d3#e7rQ8  
loss_s := 0                            ！信号光寄生损耗为0 HEhBOER?  
YIb7y1\UM  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 o#BI_#b  
/g!Xe]Ss  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 \b$Y_  
calc l0g+OMt  
  begin t -fmA?\  
    global allow all;                   ！声明全局变量 && PZ;  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 2+g'ul`  
    add_ring(r_co, N_Tm); .NxskXq)  
    def_ionsystem();              ！光谱数据函数 wqJl[~O$  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 _u6MSRX[6$  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 I }8b]  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 6VJS l%X  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 l7IF9b$c  
    finish_fiber();                                   o&$lik  
  end; ,pQ[e$u1  
}9;mtMR$  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 yw89*:A6  
show "Outputpowers:"                                   ！输出字符串Output powers： |Z+qaq{X  
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） 7+hc?H[&'  
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） Z/4bxO=m  
\pSRG=`  
*Gj`1#Z$  
; ------------- Z J1
@z.  
diagram 1:                   !输出图表1 dk]A,TB*2  
U:[CcN/~3  
"Powers vs.Position"          ！图表名称 cjd-B:l  
2t>>08T  
x: 0, L_f                      ！命令x: 定义x坐标范围 78?cCj{e  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 -mLu!32I<  
y: 0, 15                      ！命令y: 定义y坐标范围 kqq1;K
d  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 1|:;~9n<t  
frame          ！frame改变坐标系的设置 fGe"1MfU  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 7|
 j rk  
hx             ！平行于x方向网格 C 20VSwd  
hy              ！平行于y方向网格 ;sz_W%-;@  
[MKt\(  
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 4E1j0ARQQ  
  color = red,  ！图形颜色 -SzCeq(p%5  
  width = 3,   ！width线条宽度 G9K& }_,  
  "pump"       ！相应的文本字符串标签 "1%k"+&  
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 Q7/Jyx|  
  color = blue,     /BhP`a%2Q  
  width = 3, l\d[S]  
  "fw signal" e:_[0#  
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 N.SV*G @  
  color = blue, frV_5yK'  
  style = fdashed, D}-HWJQA3  
  width = 3, #Pg?T%('`  
  "bw signal" Y|W#VyM-  
tq=M 9c  
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 Y ._Om}H  
  yscale = 2,            ！第二个y轴的缩放比例 {Hvkn{{'  
  color = magenta, 0}T56aD=!  
  width = 3, 7;?7q  
  style = fdashed, wWq-zGH|&  
  "n2 (%, right scale)" Q trU_c2k  
%+UTs'I  
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 z(>:LX"xz  
  yscale = 2, -OKXfN]  
  color = red, gI@nE:(m  
  width = 3, _eH@G(W(  
  style = fdashed, s=z$;1C  
  "n3 (%, right scale)" ?
,[$8V  

pK/RkA1  
'gsO}xj  
; ------------- A-$C6q  
diagram 2:                    ！输出图表2 *GdJ<B$  
U2\k7I  
"Variation ofthe Pump Power" hl DU.k  
%Rk0sfLvn  
x: 0, 10 WW7E*kc  
"pump inputpower (W)", @x ]2|KG3t  
y: 0, 10 <UGM/+aO  
y2: 0, 100 pNu?DF{ 3  
frame 
2<V`  
hx |t#s h  
hy i"E_nN"V  
legpos 150, 150 Z hCjY  
:cP u  
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 Z1(!syg  
  step = 5, 1WY$Vs  
  color = blue, X[?E{[@Z  
  width = 3, \Z~ <jv  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 LVL#qNIu  
  finish set_P_in(pump, P_pump_in) ICTjUQP  
t6)R37  
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 " ;\EU4R  
  yscale = 2, qa6HwlC1  
  step = 5,  FE1En  
  color = magenta, 'p%w_VbI  
  width = 3, 7CX5pRNL  
  "population of level 2 (%, rightscale)", -}8r1jQH;  
  finish set_P_in(pump, P_pump_in) X-j<fX_  
7&V3f=aj6  
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 Dd$8{~h"G  
  yscale = 2, '6T *b  
  step = 5, |I.5]r-EK  
  color = red, $u)#-X;x  
  width = 3, D{4]c)>  
  "population of level 3 (%, rightscale)", z34+1d  
  finish set_P_in(pump, P_pump_in) w7<4D,hk  
B5;94YIN  
ZCfd<NS?  
; ------------- F5w=tK  
diagram 3:                         ！输出图表3 JNu+e#.Y  
}F3}"Ik'L  
"Variation ofthe Fiber Length" F-Ku0z]){?  
HLE%f;  
x: 0.1, 5 owO&[D/  
"fiber length(m)", @x mt-t8~A  
y: 0, 10 w&&)v~Y_  
"opticalpowers (W)", @y P>|sCF  
frame ,^@/I:  
hx q+XU Cnv  
hy X8XE_VtP  
$@WA}\D  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 5ai$W`6  
  step = 20,             a1v?{vu\E  
  color = blue, "YVvmCp  
  width = 3, Z>W&vDeuN  
  "signal output" JS&;7Z$KX  
G4uO
Y?0N  
;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 (IAR-957pN  
   step = 20, color = red, width = 3,"residual pump" h>/L4j*Z  
EDA6b]  
! set_L(L_f) {restore the original fiber length } :,'.b|Tl.b  
u>2opI
~m  

R>,_C7]u  
; ------------- 5N|hsfkx  
diagram 4:                                  ！输出图表4 lhF)$M  
#5^S@}e  
"TransverseProfiles" qqu]r  
)fc+B
_  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) IXR%IggJA  
z*N%kcw"  
x: 0, 1.4 * r_co /um asYUb&Hz88  
"radialposition (µm)", @x XBTjb  
y: 0, 1.2 * I_max *cm^2 \Iz-<:gA'  
"intensity (W/ cm&sup2;)", @y b.xG'  
y2: 0, 1.3 * N_Tm {XLRrU!*  
frame k,r}X:<6jz  
hx 2:6lr4{uY  
hy e~$aJO@B.R  
/,ISx}  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 &LhR0A  
  yscale = 2, tSunO-\y  
  color = gray, m$$sNPnT  
  width = 3, =K9-  
  maxconnect = 1, zY&/lWW._  
  "N_dop (right scale)" ^=w){]G  
}DkdF  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 ^<Sy{KY  
  color = red, +`.,6TNVlY  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 E,|OMK#   
  width = 3, x<) T,c5Y  
  "pump" VCUsvhI  
q>VvXUyK,  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 >NBwtF>  
  color = blue, zUJPINDb  
  maxconnect = 1, ->&amPv
 
  width = 3, C33=<r[;N<  
  "signal" sW@_q8lG  
NO.5Vy
 
J-~:W~Qx4N  
; ------------- lJU]sZ9~b  
diagram 5:                                  ！输出图表5 bO+L#Kf  
qmbhx9V   
"TransitionCross-sections" }9Awv#+  
;VPYWss  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) bVds23q  
 *l-F  
x: 1450, 2050 +HY.m+T  
"wavelength(nm)", @x O
pf^#6'mq  
y: 0, 0.6 :ZU
-Vi.b  
"cross-sections(1e-24 m&sup2;)", @y jN sM&s,  
frame IlMst16q5  
hx A
{\!nq_~N  
hy O29GPs  
lC=T{rR  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 Zex`n:Wl?j  
  color = red, =tqChw   
  width = 3, AF"XsEt.e  
  "absorption" :&$WWv  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 6G?7>M  
  color = blue, XM?C7/^k  
  width = 3, Xe<kd
B3  
  "emission" #|acRZ9 }  
*!yY7 ~#  

感谢，视频上有点看不清楚