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

(* yH5^EY7rQ  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ?=,4{(/)  
pumped at 790 nm. Across-relaxation process allows for efficient <"
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population of theupper laser level. yW5/Y02  
*)            ！（*  *）注释语句 t&}Z~Zp  
S`g:zb_  
diagram shown: 1,2,3,4,5  ！指定输出图表 5Z"IM8
?  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ap;?[B~Ga  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响
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; 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 )a"rj5~-  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 81Ixs Qt  
; 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 &AM<H}>  
VQ wr8jXye  
include"Units.inc"         ！读取“Units.inc”文件中内容 @a-u_|3q
 
zj:= 9$  
include"Tm-silicate.inc"    ！读取光谱数据 z{XN1'/V  
"c5C0 pK0  
; Basic fiberparameters:    ！定义基本光纤参数 C+ibLS4i  
L_f := 4 { fiberlength }      ！光纤长度 !kCMw%[  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 *FhD%><  
r_co := 6 um { coreradius }                ！纤芯半径 xuBXOr4"P  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 :'1UX <&B  
#=@H-ZuD7  
; Parameters of thechannels:                ！定义光信道 Z9Prw/8P  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm qZw4"&,j$  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 >d#oJ?goX  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W T}')QC&wQ  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um VGFWF3s  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 Gt;@.jY&  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 @;>i3?  
LF o{,%B  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm 81?7u!=ic+  
w_s := 7 um                          ！信号光的半径 w&&uk[Gh/a  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 w
1Ar[ P  
loss_s := 0                            ！信号光寄生损耗为0 HqM>K*XKU  
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R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 2K >tI9);  
ifA=qn0=}  
; 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 ^Ej4^d  
calc w\(LG_n|  
  begin tF:'Y ~3 p  
    global allow all;                   ！声明全局变量 !
%w#h0(b  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 jC_7cAsl  
    add_ring(r_co, N_Tm); Y)D~@|D,  
    def_ionsystem();              ！光谱数据函数 38Rod]\E  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 8R!3}kx  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ?Q$LIoR  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 JiF
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    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 r]!<iw  
    finish_fiber();                                   2kv%k3Q{  
  end; 00DWXGt20o  
E>_?9~8Mf  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 m]g"]U:  
show "Outputpowers:"                                   ！输出字符串Output powers： {sn:Lj0  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） FN$hEc!  
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） <9za!.(zu  
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; ------------- [,GXA)j  
diagram 1:                   !输出图表1 T9 @^@l$  
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"Powers vs.Position"          ！图表名称 &p?Oo^  
lHYu-}TNP  
x: 0, L_f                      ！命令x: 定义x坐标范围 @ mzf(Aq  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 bYzBe\^3q3  
y: 0, 15                      ！命令y: 定义y坐标范围 7
e,<$PH  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 m7:E73:  
frame          ！frame改变坐标系的设置 3J\NkaSR  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ^iaeY jI  
hx             ！平行于x方向网格
` eB-C//  
hy              ！平行于y方向网格 A<6V$e$:2  
)p.+39]{2  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 2>{_O?UN  
  color = red,  ！图形颜色 ~;ink   
  width = 3,   ！width线条宽度 j/zD`ydj  
  "pump"       ！相应的文本字符串标签 Kuh! b`9  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 0m5Q;|mH  
  color = blue,     q.(p.uD  
  width = 3, +uPN+CgQ@  
  "fw signal" E(G=~>
P  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 \!UNale  
  color = blue, tVx.J'"Y  
  style = fdashed, `1%SXP1  
  width = 3, y$)gj4k/D  
  "bw signal" uo1G   
':,6s  
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 l<<G".?  
  yscale = 2,            ！第二个y轴的缩放比例 2|k*rv}l  
  color = magenta, c$f|a$$b   
  width = 3, V:42\b7x  
  style = fdashed, ~L(_q]  
  "n2 (%, right scale)" uTJi }4cw  
=#XsY,r  
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 3)f=Z2U>  
  yscale = 2, XEqg%f  
  color = red, ` n{rzenPX  
  width = 3, dE5DH~ldV  
  style = fdashed, !2x"'o  
  "n3 (%, right scale)" #
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v)JQb-<  
; ------------- +DKrX  
diagram 2:                    ！输出图表2 Y51XpcXQ  
f5a%/
1?  
"Variation ofthe Pump Power" gB3&AQ  
e,E;\x &  
x: 0, 10 K/[v>(<  
"pump inputpower (W)", @x Y=G *[
G#  
y: 0, 10 /2u;w!oi.  
y2: 0, 100 f/)3b`$Wu  
frame AW'tZF"  
hx whNRUOK:  
hy ;J\{r$q  
legpos 150, 150 [[D}
vL8d  
HZQI|  
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 #)R;6"  
  step = 5, We#*.nr{3Z  
  color = blue, &
3{:h  
  width = 3, P7\(D`  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 M;MD-|
U  
  finish set_P_in(pump, P_pump_in) ]_BG"IR!..  
$!I$*R&  
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 6o;lTOes  
  yscale = 2, z!Kadqns  
  step = 5, K=sQ_j.&Z  
  color = magenta, u\qyh9s  
  width = 3,  CjQ_oNI  
  "population of level 2 (%, rightscale)", (XqeX(s  
  finish set_P_in(pump, P_pump_in) C>68$wd>  
J=K3S9:n]g  
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 v,>F0ofJ  
  yscale = 2, qw87B!D  
  step = 5, *ep!gT*4  
  color = red, $ O!f*l
G  
  width = 3, k9 *0xukJ  
  "population of level 3 (%, rightscale)", KvilGh10  
  finish set_P_in(pump, P_pump_in) qUtVqS  
C,PCU<q  
GWE`'V  
; ------------- BpP\C!:^  
diagram 3:                         ！输出图表3 e
^'?:j  
$Z28nPd/  
"Variation ofthe Fiber Length" uFdSD  
/LSiDys  
x: 0.1, 5 1Y9Ye?~jd  
"fiber length(m)", @x 7 oZ-D~3  
y: 0, 10 p'w[
5'  
"opticalpowers (W)", @y r~s03g0  
frame  7/7A  
hx tW=0AtZl]  
hy r)j#Skh].  
l3g6y9;  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 /v!H{Zw=c  
  step = 20,             7DYD+N+T  
  color = blue, V$v;lvt^Uq  
  width = 3, iBUf1v  
  "signal output" =
m/2)R{  
!d(!1fC  
;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 tb=L+WAIw  
   step = 20, color = red, width = 3,"residual pump" q',a7Tf:  
>a4Bfnf"eI  
! set_L(L_f) {restore the original fiber length } wG{obsL.!  
1~`gfHI4  
]hf4= gm  
; ------------- a|s=d  
diagram 4:                                  ！输出图表4 PPq*_Cf  
2PeI+!7s  
"TransverseProfiles" +$ -#V
  
.`h+fqa  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Fk9(FOFg  
41uSr 1  
x: 0, 1.4 * r_co /um @pS[_!EqYz  
"radialposition (µm)", @x (/KF;J^M  
y: 0, 1.2 * I_max *cm^2 pH
~JPNng  
"intensity (W/ cm&sup2;)", @y PRah?|*0s  
y2: 0, 1.3 * N_Tm =p7W^/c  
frame sN?:9J8  
hx sIy$}_  
hy /gdo~  
pF!vW  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 x)U;  
  yscale = 2, '+QgZ>q
"  
  color = gray, Bpp9I;)c  
  width = 3, L"-&B$B:  
  maxconnect = 1, ut,"[+J  
  "N_dop (right scale)" U92hv~\  
6?iP z?5  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 .z4FuG,R  
  color = red, ~ dk1fh  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 O0l;
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  width = 3, >WEg8'#O  
  "pump" 7>mYD3  
pxC5
a i  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 52 A=c1kb  
  color = blue, R"=M5  
  maxconnect = 1, F>Oh)VL,Ev  
  width = 3, 1M{#"t{6  
  "signal" `&6]P:_qp  
_ o(h]G1].  
S\rfR N  
; ------------- c,fedH;  
diagram 5:                                  ！输出图表5 ujh4cp  
~zX5}U<R  
"TransitionCross-sections" l85"C  
'ng/A4  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) od fu7P_  
_L72Ae(_  
x: 1450, 2050 igL^k`&5^"  
"wavelength(nm)", @x CUG<v3\  
y: 0, 0.6 )5v .9N6v  
"cross-sections(1e-24 m&sup2;)", @y OgnpzN  
frame ZM.g+-9  
hx K\ ]r  
hy Z}C%%2Iz  
;v'Y'!-J  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 ~e8n yB  
  color = red, fpi6pcof  
  width = 3, *~L]n4-  
  "absorption" BYf"l8^,  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 lTP02|eK  
  color = blue, <i6MbCB  
  width = 3, *S4P'JSY  
  "emission" QMY4%uyY!  
8(;i~f:bCW  

感谢，视频上有点看不清楚