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

(* NF/@'QRT  
Demo for program"RP Fiber Power": thulium-doped fiber laser, MjGeH>c  
pumped at 790 nm. Across-relaxation process allows for efficient `O:ecPD4M  
population of theupper laser level. G@4ro<  
*)            ！（*  *）注释语句 L;wfTZa  
Q}A*{9#|  
diagram shown: 1,2,3,4,5  ！指定输出图表 Td7=La0
 
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 +~E;x1&'  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 }AZ0BI,TI  
; 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 aWG7k#nE  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 IC1oW)  
; 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 'mH9O  
uh][qMyLM  
include"Units.inc"         ！读取“Units.inc”文件中内容 f:=y)+@1My  
(.:!_O
B0N  
include"Tm-silicate.inc"    ！读取光谱数据 :$>Co\D  
}bW"Z2^nB  
; Basic fiberparameters:    ！定义基本光纤参数 J`&*r;""V  
L_f := 4 { fiberlength }      ！光纤长度 XtJ_po  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 vp"b_x1-  
r_co := 6 um { coreradius }                ！纤芯半径 epcBr_}  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ?gp:uxq,.  
.ykCmznf*  
; Parameters of thechannels:                ！定义光信道 lji&]^1  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm O0"u-UX{  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 ypCarvQT  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W 0 e}N{,&Y  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Fp_?1y  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 3X0"</G6  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 yo#aX^v~y  
, ;'y <GA  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm Znv3h  
w_s := 7 um                          ！信号光的半径 r+4<Lon~  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 $P9'"a)Lm  
loss_s := 0                            ！信号光寄生损耗为0 8"fZ>XQ  
QoGvjf3z  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 s/;iZiWK  
rF/k$_bFt  
; 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 ~^<ju6O'  
calc 6AM-^S@  
  begin :y>$N(.8f  
    global allow all;                   ！声明全局变量 b3>`%?A  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 (?G?9M#7_  
    add_ring(r_co, N_Tm); x&ngCB@O  
    def_ionsystem();              ！光谱数据函数 r )EuH.
z  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 _'W en  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 }mZsK>  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 l*v6U'J  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Wfw6(L  
    finish_fiber();                                   gc ce]QS  
  end; !|G
8b'  
TJ&Z/k3-  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 ;tBc&LJ?  
show "Outputpowers:"                                   ！输出字符串Output powers： U{8]TEv  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） ^an3&  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） O&]P
u5  
}i)^?@  
qu}&4_`%:V  
; ------------- F2B9Q_>P  
diagram 1:                   !输出图表1 @@?P\jv~  
G2  
"Powers vs.Position"          ！图表名称 (jV_L1D  
uxxS."~  
x: 0, L_f                      ！命令x: 定义x坐标范围 rZ|!y ~S|  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 )kBN]>&R  
y: 0, 15                      ！命令y: 定义y坐标范围 L.%N  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 VGHy|5K$  
frame          ！frame改变坐标系的设置 Po ,zTz  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） myR}~Cj;q  
hx             ！平行于x方向网格 6 4fB$  
hy              ！平行于y方向网格 H{XD>q.  
Y$@?Y/rhR  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 _&U5 u  
  color = red,  ！图形颜色 2I8RO\zR  
  width = 3,   ！width线条宽度 RPXkf
71iM  
  "pump"       ！相应的文本字符串标签 x]6wiV  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 `T-lBwH  
  color = blue,     !oJ226>WI  
  width = 3, v0d<P2ix  
  "fw signal" 5S;|U&f|  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 cAL*Md8+  
  color = blue, n#NE.ap$&,  
  style = fdashed, ,X&(BQj h  
  width = 3, |X'Pa9u  
  "bw signal" >z,SN  
TB8a#bK4  
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 k~YZT 8  
  yscale = 2,            ！第二个y轴的缩放比例 jn+M L&  
  color = magenta, 3 zF"GT  
  width = 3, kOQq
+_Y  
  style = fdashed, 7[b]%i  
  "n2 (%, right scale)" b{Qg$ZJeR  
_:0)uR LS  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 _w'N&#  
  yscale = 2, W=$cQ(x4Z  
  color = red, B(omD3jzN  
  width = 3, 5@:c6(5$  
  style = fdashed, bsn.HT"5  
  "n3 (%, right scale)" Zl:Z31  
Mzbbr57n  
JyfWy  
; ------------- MgP6ki1z  
diagram 2:                    ！输出图表2 u`Sg'ro  
OE"r=is  
"Variation ofthe Pump Power" !Q0aKkMfL  
,^>WCG  
x: 0, 10 1Ar6hA  
"pump inputpower (W)", @x ,)CRozC\}K  
y: 0, 10 z1WF@Ej  
y2: 0, 100 Z,? T`[4B  
frame RyJN=;5p  
hx s-z*Lq*  
hy S>'S4MJE`  
legpos 150, 150 gOE3x^X*{  
!OO{qw(*g  
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 =LsW\.T6  
  step = 5, ;`TSu5/  
  color = blue, mHnHB.OL  
  width = 3, z;74(5?q  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 l$:.bwXXO  
  finish set_P_in(pump, P_pump_in) Wb|xEwqd`  
\k8|3Y~g  
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 Ga%x(1U[&  
  yscale = 2, |PI]v`[  
  step = 5, +mr\AAFn  
  color = magenta, Ao%;!(\I%  
  width = 3, \Jcj4  
  "population of level 2 (%, rightscale)", q,W6wM;,E  
  finish set_P_in(pump, P_pump_in) e/h2E dY  
?]d[K>bv  
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 @ k`^Z5tN  
  yscale = 2, -d|VXD5N  
  step = 5, upJ|`,G{  
  color = red, 9
Xr@ll  
  width = 3, bc".R]  
  "population of level 3 (%, rightscale)", wl*"Vagb  
  finish set_P_in(pump, P_pump_in) o`!7~n  
)bM #s">Y  

F%}0q&
 
; ------------- +>F #{b  
diagram 3:                         ！输出图表3 6L2Si4OGjG  
}-e  
"Variation ofthe Fiber Length" {O
"?_6',  
y[}O(  
x: 0.1, 5 `F#<qZSR  
"fiber length(m)", @x .Fz5K&E=  
y: 0, 10 &|:T+LVv$+  
"opticalpowers (W)", @y |?t6h 5Mt"  
frame wc-ll&0Z  
hx /!r#=enG7  
hy lu GEBPi  
Qe~2'Hw#9  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 W[dMf!(  
  step = 20,             Dm3/i|Y  
  color = blue, pY3N7&m\:  
  width = 3, eBK s-2r  
  "signal output" <z>K{:+>  
xELnik_L2  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 `q ;79t  
   step = 20, color = red, width = 3,"residual pump" A0NNB%4|/  
>};6>)0  
! set_L(L_f) {restore the original fiber length } U#B,Q6~  
I92c!`{  
,sAN,?eG~  
; ------------- R|Oy/RGY$  
diagram 4:                                  ！输出图表4 :Rs% (Z  
xLE+"6;W  
"TransverseProfiles" V/0?0VKG  
0I.9m[<Fc  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) a{lDHk`Wf  
,RkL|'1l  
x: 0, 1.4 * r_co /um b}G4eXkuj  
"radialposition (µm)", @x ^J8sR4p#  
y: 0, 1.2 * I_max *cm^2 u@`)u#  
"intensity (W/ cm&sup2;)", @y }OeEv@^  
y2: 0, 1.3 * N_Tm Oc;/'d2  
frame XFeeNcqF  
hx )P^5L<q>|  
hy /!o(Y8e>x  
z.H*"r  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 ASuxty  
  yscale = 2, 8ycmvpJ  
  color = gray, Nk-biD/J  
  width = 3, -R!qDA"  
  maxconnect = 1, W|U!kqU  
  "N_dop (right scale)" 0Fw0#eE  
Co2* -[R  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 dqMR<Nl&  
  color = red, Sx,O)  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 Lw=.LN  
  width = 3, qYg4H|6  
  "pump" (89NK]2x  
b$sw`Rsw  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 /j]r?KAzw  
  color = blue, t)o #!)|  
  maxconnect = 1, Ejdw"P"  
  width = 3, -aiQp@^/J  
  "signal" n:?fv=9n  
j+3~  
\lKiUy/  
; ------------- a;Ic!:L
 
diagram 5:                                  ！输出图表5 /Yk2 |L  
]1 #&J(  
"TransitionCross-sections" 4C(vBKl  
A>6b 6  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ZdE
eY|
j  
DBl.bgf  
x: 1450, 2050 ,P^pDrc  
"wavelength(nm)", @x #&.&Uu$  
y: 0, 0.6 N2_j[Pe  
"cross-sections(1e-24 m&sup2;)", @y >n@?F[Y  
frame f>JuxX\G  
hx lgZ3=h  
hy ?@9kVB*|  
sXI_!)H  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 - Z"w  
  color = red, &0Zn21q  
  width = 3, ~V?O%1)k?\  
  "absorption" ^RG6h  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 sk!v!^\_r  
  color = blue, [~bfM6Jw  
  width = 3, @.fuR#  
  "emission" BVxg=7%St  
lIO.LF3  

感谢，视频上有点看不清楚