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

(* `7``1TL  
Demo for program"RP Fiber Power": thulium-doped fiber laser, J+Y?'"r  
pumped at 790 nm. Across-relaxation process allows for efficient u[wDOw  
population of theupper laser level. ed/ "OgA  
*)            ！（*  *）注释语句 ,HE{&p2y  
N1:)Z`r  
diagram shown: 1,2,3,4,5  ！指定输出图表 tnb'\}Vn  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 /8dRql-Ne  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 |t$%kpp  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 \dB z-H'@  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 /^si(BuC^*  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 iy8Ln,4z(  
X"f]  
include"Units.inc"         ！读取“Units.inc”文件中内容 Fkqw#s(T  
|D;I>
O^"R  
include"Tm-silicate.inc"    ！读取光谱数据 Oeg^%Y   
sA"B/C|(g  
; Basic fiberparameters:    ！定义基本光纤参数 C1YH\X(r  
L_f := 4 { fiberlength }      ！光纤长度 
loyhNT=  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 KpQ@cc  
r_co := 6 um { coreradius }                ！纤芯半径 EUPc+D3  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 a}k5[)et  
&6\E'bBt  
; Parameters of thechannels:                ！定义光信道 sw(|EZ7F  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm \%W"KLP  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 (3m^@2i  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W @&Af[X4s  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 6D4u?P,  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 0}>p)k3&A  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 )\izL]=!t  
Wjd_|Kui  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm 5G#2#Al(F  
w_s := 7 um                          ！信号光的半径 k <LFH(  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Og2w]B[  
loss_s := 0                            ！信号光寄生损耗为0 0bQ"s*K  
99Nm?$g  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ]PH'G>x  
3qp\jh=FE  
; 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 UtB~joaR  
calc EBUCG"e  
  begin )c0Dofhg  
    global allow all;                   ！声明全局变量 (=Lx9-u  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 ML1/1GK*i+  
    add_ring(r_co, N_Tm); Jj+Hj[(@  
    def_ionsystem();              ！光谱数据函数 |s !7U  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 QyEoWKu;  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 RDu{U(!  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 6l(HD([_p  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 [_tBv" z  
    finish_fiber();                                  
a7fn{VU8  
  end; $viZ[Lu!m  
g % 8@pjk  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 [jKhC<t}  
show "Outputpowers:"                                   ！输出字符串Output powers： >Cglhsb:N  
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）  }}d,xI  
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） ]RI+:f  
KN\tRE  
p}a0z?  
; ------------- I^gLiLUN*6  
diagram 1:                   !输出图表1 ";w"dfC^  
CGZ3-OW@E  
"Powers vs.Position"          ！图表名称 |#O>DdKHT
 
lMb&F[KJ7  
x: 0, L_f                      ！命令x: 定义x坐标范围 =zwn3L8fL  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 3c[TPD_:  
y: 0, 15                      ！命令y: 定义y坐标范围  bR83N  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 AbOF
/g)C  
frame          ！frame改变坐标系的设置 3TnrPO1E  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ks(BS k4  
hx             ！平行于x方向网格 EpH\;25u  
hy              ！平行于y方向网格 /baSAoh/e
 
2fMKS  
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 r[KX"U-  
  color = red,  ！图形颜色 ,\ zx4*  
  width = 3,   ！width线条宽度 E Ks4N4k  
  "pump"       ！相应的文本字符串标签 V\r2=ok@y  
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 /9@VnM  
  color = blue,     e6I7N?j  
  width = 3, "|d# +C  
  "fw signal" C.?~D*Q  
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 yo!
Y%9  
  color = blue, _ v3VUm#  
  style = fdashed, *f3?0w  
  width = 3, PI$K+}E  
  "bw signal" }6 MoC0  
l !:kwF  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 (cm8x  
  yscale = 2,            ！第二个y轴的缩放比例 h~u|v[@{J  
  color = magenta, 4)E$. F^   
  width = 3, 9 kLA57  
  style = fdashed, ?4YLt|sn  
  "n2 (%, right scale)" =r>u'wRQ  
Q-y`IPtA<  
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 C?t!Uvs  
  yscale = 2, }]|e0 w:  
  color = red, 9qX)FB@'i;  
  width = 3, ({WV<T&  
  style = fdashed, T8>aU  
  "n3 (%, right scale)"
T3h1eU  
L_R(K89w  
p?'&P!  
; ------------- "{M?,
jP#  
diagram 2:                    ！输出图表2 "g&hsp+i"A  
~Nn}FNe  
"Variation ofthe Pump Power" dc,qQM  
zx;~sUR;  
x: 0, 10 ^D A<=C-[!  
"pump inputpower (W)", @x ^_\%?K_u  
y: 0, 10 sff4N>XAl<  
y2: 0, 100 dnCurWjdk  
frame ?
OVje9  
hx Pd;Gc@'~  
hy o4nDjFhh  
legpos 150, 150  aS,  
9G^gI}bY  
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 my%MXTm2  
  step = 5, >IJX=24Rc  
  color = blue, sI6coe5n  
  width = 3, C!W0L
`r  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 /^=8?wK  
  finish set_P_in(pump, P_pump_in) 1;eWnb(  
y'm5Z-@o6  
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 '>[Ut@l
T;  
  yscale = 2, W(Rp@=!C  
  step = 5, 59BB-R,V  
  color = magenta, R$i-
%3  
  width = 3, 1\-r5e; BE  
  "population of level 2 (%, rightscale)", eD!mR3Ai@D  
  finish set_P_in(pump, P_pump_in) d8K|uEHVz  
QM@zy  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 PP8627uP  
  yscale = 2, -9(pOwN |m  
  step = 5, y'(a:.%I  
  color = red, BRXD
E7vw  
  width = 3, in`|.#  
  "population of level 3 (%, rightscale)", r0*Y~ KHw  
  finish set_P_in(pump, P_pump_in) 3? F~H  
H`1q8}m  
P~s u]+  
; ------------- l"/E,X  
diagram 3:                         ！输出图表3 -quJX;~  
lN*beOj  
"Variation ofthe Fiber Length" z0@BBXQ`  
IYv.~IQO  
x: 0.1, 5 L}rYh`bUP[  
"fiber length(m)", @x (C0Wty  
y: 0, 10 f4$sH/ 2#v  
"opticalpowers (W)", @y ^0&jy:{  
frame zxkO&DGRbN  
hx J vq)%t8q>  
hy *P8CzF^>\&  
zwk&3  
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 WjOP2CVv|  
  step = 20,             wsB  
  color = blue, s"R5'W\U  
  width = 3, i6<uj  
  "signal output" l+j !CvtI  
3n~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 -kHJH><j  
   step = 20, color = red, width = 3,"residual pump" {vdY(  
u;+8Jg+xH/  
! set_L(L_f) {restore the original fiber length } _r>kR7A\{  
Q]e]\J  
*Qyu QF  
; ------------- *7b?.{  
diagram 4:                                  ！输出图表4 >>|47ps3  
"z*.Bk  
"TransverseProfiles" ZG-#YF.1  
bOSqD[?  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) =J|jCK[r  
&j,#5f(  
x: 0, 1.4 * r_co /um 70 Ph^e)  
"radialposition (µm)", @x k(o(:-+x  
y: 0, 1.2 * I_max *cm^2 e=3C*+lq\  
"intensity (W/ cm&sup2;)", @y yzZzaYv "/  
y2: 0, 1.3 * N_Tm z[6avW"q  
frame "!CV
m{7[  
hx c-_1tSh}  
hy Kp^"<%RT  
41P0)o  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 Z_fwvcZ?05  
  yscale = 2, 'T$Cw\F&  
  color = gray, bR,E
s~n  
  width = 3, [XttT  
  maxconnect = 1, mE_%  
  "N_dop (right scale)" :,fT^izew  
}ice*3'3  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 +r7hc;+G  
  color = red, \Zh&[D!2  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 :aBm,q9i:}  
  width = 3, WP?]"H  
  "pump" -<9Qez)y  
H4sW%nZ0  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 P(DEf(  
  color = blue, Zb2PFwcy  
  maxconnect = 1, nCQ".G  
  width = 3, y5F"JjQAa  
  "signal" pL!,1D!  
ycSGv4 )  
!#~KSO}zW2  
; ------------- cr
OSr/I$  
diagram 5:                                  ！输出图表5 `Tf}h8*  
kvuRT`/  
"TransitionCross-sections" ''D7Bat@  
> ;#Y0  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ^/$dSXKF  
S=lCzL;j"  
x: 1450, 2050 KC"&3  
"wavelength(nm)", @x K F_Uu  
y: 0, 0.6 !L|l(<C  
"cross-sections(1e-24 m&sup2;)", @y MgJ5FRQ  
frame  ^#C+l  
hx po\jhfn  
hy ;Z`a[\i':  
SjpCf8Z(  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 ^*4#ZvpG2  
  color = red, .AOc$Nt  
  width = 3, )P?Fni}  
  "absorption" n1GX`K  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 0^\H$An*k  
  color = blue, n#Dy YVb  
  width = 3, 3 !8#wn  
  "emission" &WLN   
Z.!<YfA)  

感谢，视频上有点看不清楚