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

(* G%HG6  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 2n3&uvf'TL  
pumped at 790 nm. Across-relaxation process allows for efficient a_!H_J  
population of theupper laser level. zV}:~;w  
*)            ！（*  *）注释语句 >rlUV"8jY;  
|?J57(  
diagram shown: 1,2,3,4,5  ！指定输出图表 60|PVsmDm  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 w>*Jgc@A*  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 %P~;>4i,  
; 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
v_Vw!u  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 wL~AL  
; 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 c<Cf|W  
3:xx:Jt  
include"Units.inc"         ！读取“Units.inc”文件中内容 G~y:ZEnN[  
+JYb)rn$^  
include"Tm-silicate.inc"    ！读取光谱数据  [{2v}  
fNi&r0/-t  
; Basic fiberparameters:    ！定义基本光纤参数 2'=)ese  
L_f := 4 { fiberlength }      ！光纤长度 F_0D)H)N@  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 w-JWMgY8w  
r_co := 6 um { coreradius }                ！纤芯半径 n@tt.n!{l  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 1|8Bv0-b  
Psf'^42(v  
; Parameters of thechannels:                ！定义光信道 ^[SW07o~  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm d:iJUVpr  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 A5F(-  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W &-FG}|*4M  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um >"IG\//I  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 1
c QF(j_  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 J>#hu3&UOQ  
rZwSo]gp  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm <ot`0  
w_s := 7 um                          ！信号光的半径 W*s=No3C  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 
41=H&G&  
loss_s := 0                            ！信号光寄生损耗为0 G9-ETj}  
'^m'r+B"  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 Vaf,
 
R\ 8[6H  
; 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 NsYEBT7f  
calc s@$0!8sxm  
  begin :vIJ>
6lIR  
    global allow all;                   ！声明全局变量 PeIi@0vA  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 ;bG?R0a  
    add_ring(r_co, N_Tm); 4u*n7di$9d  
    def_ionsystem();              ！光谱数据函数 }Ifa5Lq)  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 h1(i
/{}:  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 OcMB)1uh\  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 9mk@\Gqqm  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数
O)V;na  
    finish_fiber();                                   jA{BG_  
  end; 2He R1m<  
E4o{Z+C  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 b]?5r)GK  
show "Outputpowers:"                                   ！输出字符串Output powers： {hN\=_6*EW  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） HaL'/V~  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） Wn6m$=  
u
SYI X  
H(K!{k  
; ------------- *YH!L{y  
diagram 1:                   !输出图表1 HOu$14g  
g&$5!ifgi  
"Powers vs.Position"          ！图表名称 q&[G^9  
d, g~.iS~  
x: 0, L_f                      ！命令x: 定义x坐标范围 c}$>UhLe  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 =Bc{0p*  
y: 0, 15                      ！命令y: 定义y坐标范围 O[$X36z  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 kD+#|f  
frame          ！frame改变坐标系的设置 tk-)N+M.  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） NUb$PT  
hx             ！平行于x方向网格 y|BHSc3  
hy              ！平行于y方向网格 %"c;kvw  
Uu+ibVM$  
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 |FT.x9e-  
  color = red,  ！图形颜色 Zjn1,\(t~u  
  width = 3,   ！width线条宽度 %4rlB$x  
  "pump"       ！相应的文本字符串标签 +%[, m&  
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 4J`-&05O  
  color = blue,     gA_oJW4_  
  width = 3, D1deh=  
  "fw signal" |UlR+'rl  
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 Fv,
c8f  
  color = blue, GD}rsBQNkJ  
  style = fdashed, 0=7Ud<  
  width = 3, d< XY"Y%  
  "bw signal" >Giw\|:f(  
:T PG~`k(  
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:+:>[F  
  yscale = 2,            ！第二个y轴的缩放比例 V6ECL6n  
  color = magenta, [-#1;!k  
  width = 3, ,0HID:&  
  style = fdashed, }Gb^%1%M  
  "n2 (%, right scale)"  n}b/9  
Vm@VhCsp  
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 M7Z&t'=  
  yscale = 2, 0Z((cI\J  
  color = red, Qu<HeSA_  
  width = 3, 8KP  
  style = fdashed, R.* k7-(;  
  "n3 (%, right scale)" ~ cu+QR)  
p}GTOJT}  
OmK0-fa/  
; ------------- *a_QuEw_k  
diagram 2:                    ！输出图表2 6,CK1j+tZ  
+NB5Fd4  
"Variation ofthe Pump Power" $hk_v~zM  
8zeD%Uv  
x: 0, 10 JKp@fQT *  
"pump inputpower (W)", @x y&4im;X0  
y: 0, 10 N/0Q`cQ-  
y2: 0, 100 #Sg/  
frame YP"%z6N@v  
hx &,XPMT  
hy uY3$nlhP6  
legpos 150, 150  wN0?~  
WV|9d}5  
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 0j#$Swa  
  step = 5, eBECY(QMQ  
  color = blue, tnmz5Q  
  width = 3, 7V\M)r{q7  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 \=W t{  
  finish set_P_in(pump, P_pump_in) 5oD%~Fk l  
,qgR+]?({  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 Tc;BE  
  yscale = 2, h2]GV-  
  step = 5, E&W4`{6K4  
  color = magenta, cz>`$Zz  
  width = 3, !G~\9  
  "population of level 2 (%, rightscale)", Me,AE^pgL'  
  finish set_P_in(pump, P_pump_in) #0qMYe>Y  
oB}rd9  
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}z{OB  
  yscale = 2, qp1rP#  
  step = 5, s.}:!fBk  
  color = red, ?v@q&  
  width = 3, '&xRb*  
  "population of level 3 (%, rightscale)", M^A;tPw  
  finish set_P_in(pump, P_pump_in) [;INVUwG^  
@)@hzXQ  
<_Po/a!c3  
; ------------- b
WZX  
diagram 3:                         ！输出图表3 U &W}c^#  
}5;3c%  
"Variation ofthe Fiber Length" T^ah'WmNw
 
p7
)b@,  
x: 0.1, 5 0.t1p(x;  
"fiber length(m)", @x }JWk?  
y: 0, 10 b{JxTT}03  
"opticalpowers (W)", @y ?K?v64[  
frame 3D7phq>.q  
hx G Q+g.{c  
hy &4l>_  
?#;zB  
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 1(U\vMb  
  step = 20,             {~d8
_%:b  
  color = blue, o[eIwGxZ  
  width = 3, d5B96;3  
  "signal output" nR~L$Wu5_a  
ut^^,w{o>  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 )%5T*}j  
   step = 20, color = red, width = 3,"residual pump" '||),>~  
A|U_$!cLZ  
! set_L(L_f) {restore the original fiber length } wms8z  
?_c*(2i&^  
E :Y *;  
; ------------- [I` 6F6  
diagram 4:                                  ！输出图表4 Z)zmT%t  
|LDo<pE*V4  
"TransverseProfiles" nK9A=H'Hc  
S}*%l)vfR  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) #G ZGk?  
"&/&v  
x: 0, 1.4 * r_co /um NLxsxomj  
"radialposition (µm)", @x `#~HCl  
y: 0, 1.2 * I_max *cm^2 wMB<^zZmv  
"intensity (W/ cm&sup2;)", @y rx#\Dc}  
y2: 0, 1.3 * N_Tm /\9X0a2h|E  
frame VXAgp6  
hx /TgG^|  
hy !>+Na~eN  
9m fYB  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 WNPdym  
  yscale = 2, x~tG[Y2F?  
  color = gray, OC]_b36v  
  width = 3, ^25[%aJI  
  maxconnect = 1, S|%f<zAtJ  
  "N_dop (right scale)" [ Q6v#I  
`QlChxd  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 %h%^i   
  color = red, 8W"~>7/>D  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 Mc6?]wDB]  
  width = 3, =ITMAC\  
  "pump" d(L u|/~  
b&Sk./ J6  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 "+ji`{  
  color = blue, vxo iPqo  
  maxconnect = 1, q*<Df=+B  
  width = 3, T(^<sjOs  
  "signal" "rr,P0lgX  
Bk1Q.Un  
jn#  
; ------------- *r+i=i8{  
diagram 5:                                  ！输出图表5 ds4)Nk4%O  
!R WX1Z  
"TransitionCross-sections" Rd5r~iT
 
SL/ FMYdd  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Z;W`deA  
!58-3F%P  
x: 1450, 2050 -<i&`*zG  
"wavelength(nm)", @x @fbB3  
y: 0, 0.6 .Tdl'y:..  
"cross-sections(1e-24 m&sup2;)", @y ;ePmN|rq;  
frame E#T-2^nD  
hx U&/Jh^Yy  
hy h"')D  
q7wd96G:  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 Tp`by 1s  
  color = red, ^6ZA2-f/<8  
  width = 3, n}yqpW!%n  
  "absorption" b#.hw2?a`  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 SN'LUwaMp!  
  color = blue, 1k\1U  
  width = 3, Db= iJ68  
  "emission" 5_nkN`x  
+MeEy{;  

感谢，视频上有点看不清楚