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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

(* W;9Jah.  
Demo for program"RP Fiber Power": thulium-doped fiber laser, Hz] p]  
pumped at 790 nm. Across-relaxation process allows for efficient g bc])`aJ>  
population of theupper laser level. DZ9qIc}Y  
*)            ！（*  *）注释语句 g0~3;y  
ok+-#~VTn  
diagram shown: 1,2,3,4,5  ！指定输出图表 6"UL+$k  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 5NECb4FG  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 K`d3p{M  
; 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 p<9e5`& I  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 $={WtR  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 !1M=9 ~$!  
WP-'gC6K=  
include"Units.inc"         ！读取“Units.inc”文件中内容 <fLk\ =  
8;r7ksE~  
include"Tm-silicate.inc"    ！读取光谱数据 mp x/~`c  
;PrL)!  
; Basic fiberparameters:    ！定义基本光纤参数 +v}R-gNR  
L_f := 4 { fiberlength }      ！光纤长度 koizk&)  
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(Y=MW;g  
r_co := 6 um { coreradius }                ！纤芯半径 ,B<Tt|'  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 [!v| M  
?8LRd5LH  
; Parameters of thechannels:                ！定义光信道 E*t0ia8  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm QhHexr6  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 VC6S4FU4K  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W N>A*N,+  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um ;_^ "}  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 jSj (ZU6  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 I@f">&^  
XU}sbbwu  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm {=NHidi~  
w_s := 7 um                          ！信号光的半径 5_mb+A n,  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 q&-A}]  
loss_s := 0                            ！信号光寄生损耗为0 sO!YM5v8  
32f lOi:  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 NNQro)Lpe  
Hkv4t5F  
; 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 -pRyN]YD  
calc 62Ab4!  
  begin 2Q,8@2w;  
    global allow all;                   ！声明全局变量 | ZI~#V  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 oR=^NEJv  
    add_ring(r_co, N_Tm); g]g2`ab |  
    def_ionsystem();              ！光谱数据函数 3d{v5. C#X  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 .+H8c.  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 $UZ4,S?V  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 042sjt  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 jaAv_=93f  
    finish_fiber();                                   s'V8PN+-  
  end; eqSCNYN  
I54O9Aoy  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 .~4>5W"u  
show "Outputpowers:"                                   ！输出字符串Output powers： O/IW.t  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） V;Zp3Qo!  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） !Cj1:P  
GRC=G&G  
3:rH1vG.m  
; ------------- 1GY[1M1^  
diagram 1:                   !输出图表1 bl>MD8bzLE  
6dh@DG*k  
"Powers vs.Position"          ！图表名称 j~G^J  
E\r5!45r  
x: 0, L_f                      ！命令x: 定义x坐标范围 N1UE u,j  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 _c|>m4+X  
y: 0, 15                      ！命令y: 定义y坐标范围 XbJ=lH  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 J ,fXXi)J  
frame          ！frame改变坐标系的设置 <ZJ>jZV0*  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） N1I1!!$K;%  
hx             ！平行于x方向网格 kRgyvA,*;  
hy              ！平行于y方向网格 AAsl )  
/|y3M/;F  
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 i\B >J?Q\  
  color = red,  ！图形颜色 *?gn@4Ly  
  width = 3,   ！width线条宽度 E~zLhJTUL'  
  "pump"       ！相应的文本字符串标签 Dd*T5A?  
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 q+32|k>)  
  color = blue,     `X]-blHo  
  width = 3, sp[nKo ^  
  "fw signal" \1RQ),5 %]  
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 ~?aq=T  
  color = blue, <W vuW6  
  style = fdashed, 5/mW:G,&  
  width = 3, O#7fkL  
  "bw signal" B4&@PX"'>,  
1uv"5`%s  
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 0i$jtCCL(  
  yscale = 2,            ！第二个y轴的缩放比例 U;KHF{Vm  
  color = magenta, 2s EdN$O  
  width = 3, @l&5 |Cia  
  style = fdashed, -nO('(t  
  "n2 (%, right scale)" lw? f2_fi  
i,ku91T  
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 f+s'.z%  
  yscale = 2, )G ,LG0"-  
  color = red, m0F-[k3)  
  width = 3, [j}%&$  
  style = fdashed, 9XS+W w7  
  "n3 (%, right scale)" " %|CD"@  
Px=/fO G  
]-)qL[Q  
; ------------- M.d{:&@`%  
diagram 2:                    ！输出图表2 i(,R$AU  
.'"+CKD.N  
"Variation ofthe Pump Power" nAd 4g|  
iml*+t  
x: 0, 10 RGLwtN  
"pump inputpower (W)", @x F f& VBm  
y: 0, 10 jzEimKDE's  
y2: 0, 100 C-_u; NEu  
frame oLX6w  
hx pa+^5N  
hy `"(7)T{  
legpos 150, 150 BD=;4SLT  
|fTQ\q]W  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 0,m*W?^31  
  step = 5, 3=dGz^Zdv:  
  color = blue, Z/;rM8[{&  
  width = 3, H7#RL1qM&  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 ":"M/v%F  
  finish set_P_in(pump, P_pump_in) X^9_'T9  
i>,5b1x~  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 )KBv[|  
  yscale = 2, r-Z'  
  step = 5, ,[Cl'B  
  color = magenta, )zUV6U7v  
  width = 3, `?=AgGg  
  "population of level 2 (%, rightscale)", "VcGr#zW  
  finish set_P_in(pump, P_pump_in) [(ty{  
g-}Vu1w0{6  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 do=VPqy  
  yscale = 2, Y60ld7H  
  step = 5, sur2Mw(M"  
  color = red, -+Q,xxu  
  width = 3, W11_MTIU  
  "population of level 3 (%, rightscale)", Cn28&$:J  
  finish set_P_in(pump, P_pump_in) %Si3t2W/  
4eaC18?  
3\mFK$#sr  
; ------------- ?m?e2{]u,  
diagram 3:                         ！输出图表3 yuI5# VUS  
u3k+Xg:  
"Variation ofthe Fiber Length" YT:<AJm  
31b-r[B{%  
x: 0.1, 5 qM1$?U  
"fiber length(m)", @x wEDU*}~  
y: 0, 10 ]"CA P%  
"opticalpowers (W)", @y Rut6m5>  
frame NqF-[G<  
hx F=P|vYL&&  
hy x!YfZ*  
sgB3i`_M  
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 #d|.BxH  
  step = 20,             mZM5aTQ3  
  color = blue, 9Hc#[Ml  
  width = 3, t}oxHEa V  
  "signal output" 'QW 0K]il  
vNtbb]')m  
;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 2G'G45Q  
   step = 20, color = red, width = 3,"residual pump" \h0e09& I  
"?S#vUS+ 2  
! set_L(L_f) {restore the original fiber length } ]\3dJ^q|%  
<N`rcKE%~P  
JTs.NY <z  
; ------------- nwkhGQ  
diagram 4:                                  ！输出图表4 (8EZ,V:  
6"=e+V@  
"TransverseProfiles" Y5npz^i  
bC@b9opD  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Fvv6<E  
Tw`l4S&  
x: 0, 1.4 * r_co /um rB7(&(n>^  
"radialposition (µm)", @x -pjL7/gx  
y: 0, 1.2 * I_max *cm^2 .#}SK!"B  
"intensity (W/ cm&sup2;)", @y $ jn tT(V  
y2: 0, 1.3 * N_Tm {Rz`)qqE  
frame -51L!x}1c  
hx IM@Qe|5  
hy #Gg^fm  
97&6iTYA  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 [ z&y]~  
  yscale = 2, ahf$#UQLb  
  color = gray, U{_O=S u  
  width = 3, J$P]>By5:  
  maxconnect = 1, x*)Wl!  
  "N_dop (right scale)" 0loC^\f  
U$J]^-AS  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 ']rh0?  
  color = red, !C+25vup  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 onmO>q*  
  width = 3, ?O3 G  
  "pump" AKWw36lm  
{C6Yr9  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 +HcH]D;  
  color = blue, i4-L!<bJ  
  maxconnect = 1, =o-qu^T^u  
  width = 3, >/n/n{{  
  "signal" cCeD3CuRA%  
#&/*ll)  
k+i=0 P0mf  
; ------------- %Wu8RG}  
diagram 5:                                  ！输出图表5 SVpe^iQ]1\  
<0vvlOL5  
"TransitionCross-sections" #z~oc^J^T  
*%8us~w5/  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ILpB:g  
W"0#  
x: 1450, 2050 E }yxF .  
"wavelength(nm)", @x l&yR-FJ7KY  
y: 0, 0.6 /bb4nM_E/  
"cross-sections(1e-24 m&sup2;)", @y ] x Kmz  
frame 4EELaP|%  
hx p 2i5/Ly  
hy [WK_Vh{  
V:+}]"yJ,  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 i a|F  
  color = red, r*$"]{m}  
  width = 3, Vz#cb5:g  
  "absorption" `#UTOYx4  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 $@NZ*m%?JQ  
  color = blue, WV6vM()#!C  
  width = 3, 'X?`+2wK   
  "emission" '=ZE*nGC  
-g>27EI5  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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