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

(* ]gYnw;W$  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 9l2,:EQ
*  
pumped at 790 nm. Across-relaxation process allows for efficient X3#/|>
 
population of theupper laser level. FR9<$  
*)            ！（*  *）注释语句 OaU-4 ~n;  
Z~{0XG\Y  
diagram shown: 1,2,3,4,5  ！指定输出图表 c6sGjZdR  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 #|fa/kb~  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 R6HMi#eF  
; 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 cZKK\h
f<  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 |du@iA]dP  
; 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 O(;K]8  
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include"Units.inc"         ！读取“Units.inc”文件中内容 D.o|pTZ  
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include"Tm-silicate.inc"    ！读取光谱数据 /W'GX n  
6Y6DkFdvrZ  
; Basic fiberparameters:    ！定义基本光纤参数 yiGq?WA7  
L_f := 4 { fiberlength }      ！光纤长度 an^"_#8DA@  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 fk4s19;?  
r_co := 6 um { coreradius }                ！纤芯半径 /*g3TbUs  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 `O(ec  
/2-S/,a  
; Parameters of thechannels:                ！定义光信道 / <WB%
O  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm <b>
@'\w9  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 A_1cM#4  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W Rk.
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w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 5R}Qp<D[^  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 ')t :!#  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 cc7*O  
q}e"E cr  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm L<!}!v5ja  
w_s := 7 um                          ！信号光的半径 ~n%~ Z|mMF  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 /kE3V`es  
loss_s := 0                            ！信号光寄生损耗为0 M>dP 1  
r(iT&uz  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 !Uz{dFJf;  
"P HkbU  
; 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 e>~g!S}G  
calc 1C\OL!@L  
  begin Y~Y-L<`I  
    global allow all;                   ！声明全局变量 ?>5[~rMn  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 ;NH5 L,  
    add_ring(r_co, N_Tm); Twyx(~'&R  
    def_ionsystem();              ！光谱数据函数 yjUZ40Dq  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 `rsP
IOu  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 x@I*(I  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 w~a^r]lPW
 
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 %eWzr  
    finish_fiber();                                   $E3-</ f  
  end;  S[!K  
zb.^ _A  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 ^I03PIy0l  
show "Outputpowers:"                                   ！输出字符串Output powers： ~K}iVX  
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） OQMkpX-dH  
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） sS;6QkI"y  
,#[0As29u  
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; ------------- O6Bs!0,  
diagram 1:                   !输出图表1 ~Q"3#4l  
E8gXa-hv  
"Powers vs.Position"          ！图表名称 nmZz`P
9g  
yQE|FbiA  
x: 0, L_f                      ！命令x: 定义x坐标范围 j78WPG  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 A^:[+PJHN  
y: 0, 15                      ！命令y: 定义y坐标范围 \7PPFKS  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 fe PH=C  
frame          ！frame改变坐标系的设置 CsHHJgx  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） tJ[yx_mf  
hx             ！平行于x方向网格 e5G)83[=  
hy              ！平行于y方向网格 HE58A.Q&  
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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 51j5AbFQ"  
  color = red,  ！图形颜色 1=(jpy  
  width = 3,   ！width线条宽度 n&ZArJ  
  "pump"       ！相应的文本字符串标签 g^|}e?  
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 u(l[~r>8W;  
  color = blue,     d%_=r." Y  
  width = 3, #\s*>Z  
  "fw signal" /ivcqVu]  
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 )!.ef6

|  
  color = blue, lM1~K  
  style = fdashed, mM&Sq;JJ;  
  width = 3, i!g}PbC[  
  "bw signal" 873$EiyXR  
Cbu/7z   
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 `)V1GR2 ES  
  yscale = 2,            ！第二个y轴的缩放比例 S:)Aj6>6  
  color = magenta, :5Vk+s]8  
  width = 3, K~'!JP8@  
  style = fdashed, _:@~bHd  
  "n2 (%, right scale)" Q#"p6ZmI  
j1{|3#5V  
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 4x7(50hp#  
  yscale = 2, +UbSqp1BS  
  color = red, n%'M?o]DF  
  width = 3, 0K/Pth"*  
  style = fdashed, X`#,*HkK  
  "n3 (%, right scale)" n@5Sp2p  
E;!pK9wL|  
;1qE:x}
'H  
; ------------- .{+KKa $@G  
diagram 2:                    ！输出图表2 AGaM &x=  
6v8HR}iK  
"Variation ofthe Pump Power" %Aaf86pkp  
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x: 0, 10
\:]  
"pump inputpower (W)", @x 9R_2>BDn  
y: 0, 10 <0lXJqd  
y2: 0, 100 $!Z><&^/  
frame \H(r }D$u<  
hx EUBJnf:q  
hy
p7 s#j  
legpos 150, 150 8VG6~>ux'>  
fM,!9}<  
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 =&+]>g{T  
  step = 5, oh*Hzb  
  color = blue, HIiMq'H^  
  width = 3, Br/qOO:n$}  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 \s_lB~"P!3  
  finish set_P_in(pump, P_pump_in) &gF*p
 
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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 vTnrSNdSE  
  yscale = 2,
zED#+-7  
  step = 5, M)v\7a  
  color = magenta, nW)-bAV<  
  width = 3, &UzeNL"]  
  "population of level 2 (%, rightscale)", hxG=g6:G  
  finish set_P_in(pump, P_pump_in) /|7@rH([{  
BR&T,x/d  
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 tG8)!  
  yscale = 2, '?| (QU:)F  
  step = 5, SZUhZIz&  
  color = red, LDg"s0n#  
  width = 3, /#mq*kNIM6  
  "population of level 3 (%, rightscale)", >?Y)evW  
  finish set_P_in(pump, P_pump_in) :Y? L*  
` =ocr8c  
sk'<K5~  
; ------------- #h,7dz.d  
diagram 3:                         ！输出图表3 WP(+jL^-  
lKVy{X3]*  
"Variation ofthe Fiber Length" IZ
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8aDSRfv*  
x: 0.1, 5 eZ>KA+C[  
"fiber length(m)", @x bBx.snBK  
y: 0, 10 cnJL*{H<2  
"opticalpowers (W)", @y 1Yr&E_5/  
frame ~bm VpoI  
hx @ P:b\WCI  
hy bx!uHL=  
u_kcuN\Sq  
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 +SM&_b  
  step = 20,             8]SJ=c"}Xf  
  color = blue, ]V*ku%L0  
  width = 3, ? PIq/[tk  
  "signal output" O &/9wi>!q  
L&D+0p^lI  
;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 :eK(9o  
   step = 20, color = red, width = 3,"residual pump" ioIOyj  
M<Gr~RKmAn  
! set_L(L_f) {restore the original fiber length } b*;zdGX.A9  
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; ------------- *HT)Au"5  
diagram 4:                                  ！输出图表4 #
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d3nx"=Cy0I  
"TransverseProfiles" @M]uUL-ze  
iTX:*$~I  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) F'
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x: 0, 1.4 * r_co /um Yg @&@S]  
"radialposition (µm)", @x .,-,@ZK  
y: 0, 1.2 * I_max *cm^2 gKp5*  
"intensity (W/ cm&sup2;)", @y Z`FEB0$  
y2: 0, 1.3 * N_Tm "ITC P<+  
frame y15 MWZ  
hx K;n2mXYGM  
hy 96V@
+I  
|iGfX,C|  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 E?VPCx  
  yscale = 2, T9s$IS,  
  color = gray, sl5y1W/]]  
  width = 3, FJ/>=2^B  
  maxconnect = 1, b 8vyJb,K  
  "N_dop (right scale)" mYU7b8x_  
[RAzKzC\M  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 'ycr/E&m{  
  color = red, ">8]Oi;g  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 tQ,,krw~  
  width = 3, kiah,7V/  
  "pump" 3 s@6pI  
U@;W^Mt  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 :,<G6"i  
  color = blue, sIVVF#0}]  
  maxconnect = 1, cWNZ +Q8Y  
  width = 3, 4qd =]i  
  "signal" tK $r_*  
NWSm  
[N35.O6P6u  
; ------------- tQrF A2
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diagram 5:                                  ！输出图表5 }\iH~T6  
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"TransitionCross-sections" f1Z
 
P!6v0ezN  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) `:aml+  
{6y@;Fd  
x: 1450, 2050 31y>/*}  
"wavelength(nm)", @x iXF iFsb  
y: 0, 0.6 i)@IV]]6yL  
"cross-sections(1e-24 m&sup2;)", @y #hKaH -j  
frame P' ";L6h  
hx `Kt]i5[ "  
hy xr;:gz!h  
K)D5%?D  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 \!*3bR  
  color = red, ?k|}\l[X1  
  width = 3, Wzn!BgxRr  
  "absorption" =&!L&M<<  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 ZaNZUVBh  
  color = blue, %2S+G?$M?  
  width = 3, 0P+B-K>n  
  "emission" b}f#[* Z  
`rwzCwA1  

感谢，视频上有点看不清楚