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

(* Ru Q\H0
pr  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ,9q=2V[GP  
pumped at 790 nm. Across-relaxation process allows for efficient f- pt8  
population of theupper laser level. X6~y+R  
*)            ！（*  *）注释语句 +(5H$O{h  

V; 1r  
diagram shown: 1,2,3,4,5  ！指定输出图表 Wxg,y{(`  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 2#LcL  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 >\K<q>*  
; 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 Qw^nN(K!>  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 |EaGKC(   
; 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 -
vI?b#  
-gh',)R  
include"Units.inc"         ！读取“Units.inc”文件中内容 -[s*R%w  
j-ugsV`2=*  
include"Tm-silicate.inc"    ！读取光谱数据 g# :|Mjgh  
-Q;5A;sr2  
; Basic fiberparameters:    ！定义基本光纤参数 ?L#C'Lz2+  
L_f := 4 { fiberlength }      ！光纤长度 6)P~3C'  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 TH/!z,(>  
r_co := 6 um { coreradius }                ！纤芯半径 MQ2gzKw>  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 gh}FZs5P  
R! ?8F4G  
; Parameters of thechannels:                ！定义光信道 ]Ole#Lz}Q  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm :7IL|bA<  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 C/e`O|G  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W a
=gTGG"9  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um BnqAv xX  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布
C^Tc9  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 *#Hi W)  
iwCnW7:  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm H|T:_*5  
w_s := 7 um                          ！信号光的半径 skdSK7 n  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 2Ua_7  
loss_s := 0                            ！信号光寄生损耗为0 *(L4
rK\2  
h|dVVCsN  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 g8mVjM\B;  
jt tlzCDn  
; 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 {gl-tRC3  
calc 8 +xLi4Pw  
  begin Jd&Qi)1  
    global allow all;                   ！声明全局变量 }f^r@3Cb3  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 OCo=h|qBp  
    add_ring(r_co, N_Tm); ~.AUy%$_g+  
    def_ionsystem();              ！光谱数据函数 b`E0tZcJ  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 R+gh 2 6e  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 {LJwW*?  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 ):&A\nb  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 wsP3hE' ]  
    finish_fiber();                                   #@Zz Bf  
  end; uwQ{y>SG  
gnNMuqt  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 6,uW{l8L  
show "Outputpowers:"                                   ！输出字符串Output powers： .Q?cNSWU  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） Mc~(S$FU$  
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） 9fvy)kX;s  
(p68Qe%OuG  
,\[&%ph  
; ------------- 0Apdhwk~  
diagram 1:                   !输出图表1 +f+x3OMX3  
~(
{aj|Y  
"Powers vs.Position"          ！图表名称 B!!xu  
9Z6] ];8E  
x: 0, L_f                      ！命令x: 定义x坐标范围 Ne@Iv)g?  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 +kH*BhSj  
y: 0, 15                      ！命令y: 定义y坐标范围 s41<e"  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 DuZ51[3_L  
frame          ！frame改变坐标系的设置 ~!,'z  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） nO$(\ z)  
hx             ！平行于x方向网格 rgB`<[:b  
hy              ！平行于y方向网格 5IBe;o  
+G?4Wc1  
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 8G1Tpn  
  color = red,  ！图形颜色 5ts8o&|   
  width = 3,   ！width线条宽度 {]]nQ  
  "pump"       ！相应的文本字符串标签 engql;  
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 z++*,2F  
  color = blue,     %@G<B  
  width = 3, =:1f 0QF  
  "fw signal" Io5-[d  
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 G|'DAj%  
  color = blue, y{s?]hLk
 
  style = fdashed, !?Z}b.%W  
  width = 3, ^;<s"TJ(m)  
  "bw signal" NV9D;g$Y  
5X|=qZ  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 ^EjZ.#2l;  
  yscale = 2,            ！第二个y轴的缩放比例 E%3WJ%A  
  color = magenta, HpSgGhL'J&  
  width = 3, ub{<m^|)  
  style = fdashed, c|:H/Y2n|  
  "n2 (%, right scale)" 7sC$hm]  
[O&2!x  
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 zr\I1v]?1#  
  yscale = 2, 6*S|$lo9B  
  color = red, }v;@1[.B  
  width = 3, :upi2S_e  
  style = fdashed, v~?d7p{  
  "n3 (%, right scale)" vE>J@g2#  
8QE0J$d5  

d\3L.5]X  
; ------------- Aw;~b&.U{_  
diagram 2:                    ！输出图表2  ;B^G<  
x!{5.#  
"Variation ofthe Pump Power" -F/"W  
37v!:xF!  
x: 0, 10 d@b"tb}R  
"pump inputpower (W)", @x FdKp@&O+1  
y: 0, 10 & *B@qQ  
y2: 0, 100 WT;=K0W6&  
frame @7"xDgA  
hx 7F>5<Gv:-  
hy KY!  
legpos 150, 150 H(lq=M0~  
q<@f3[A  
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 14]!LgH  
  step = 5, 9FP6Z[4  
  color = blue, ?#<Fxme  
  width = 3, e/r41  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 KX"?3#U#Fm  
  finish set_P_in(pump, P_pump_in) @rRBo:0%  
>O&(G0!N+}  
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 R."<he ;  
  yscale = 2, ivb&J4?y  
  step = 5, >e/;  
  color = magenta, w+=>b  
  width = 3, !<h*\%;  
  "population of level 2 (%, rightscale)", WQ\'z?P  
  finish set_P_in(pump, P_pump_in) zQ(li9  
d0Py[37V  
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 ?uc=(J+6  
  yscale = 2, /j0<x^m/  
  step = 5, MQ$[jOAqP  
  color = red, eZ[CqUJ&  
  width = 3, czi$&(N0w$  
  "population of level 3 (%, rightscale)", g:dw%h  
  finish set_P_in(pump, P_pump_in) 6^H64jM  
Pg{Dy>&2`I  
lf4-Ci*X  
; ------------- UAFl+d!  
diagram 3:                         ！输出图表3 4rO07)~l  
SuB;Nb7r`  
"Variation ofthe Fiber Length" V()s!w  
S:v]
3G  
x: 0.1, 5 Lp5LRw  
"fiber length(m)", @x Pz,kSxe=  
y: 0, 10 S)iv k x  
"opticalpowers (W)", @y :UoZ`O~  
frame 94=Wy-  
hx <ap%+(!I  
hy :@y!5[88!  
awB1ryrOF  
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 [c+[t3dz  
  step = 20,             Y/2@P
zA|  
  color = blue, :7KcD\fCj  
  width = 3, X~*1  
  "signal output" XpJT
/&4  
O]DZb+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 ZN~:^,PO/  
   step = 20, color = red, width = 3,"residual pump" %{!*)V\  
x~j>Lvw L  
! set_L(L_f) {restore the original fiber length } %E}f7GT4  
8)s}>:}  
0UB)FK,9  
; ------------- 0j %s H  
diagram 4:                                  ！输出图表4 ;+'x_'a  
gtHWd;1&f  
"TransverseProfiles" wS-D"\4/  
]R32dI8N  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) z|^:1ov,  

qa)X\0  
x: 0, 1.4 * r_co /um a6wPkf7-H  
"radialposition (µm)", @x (2RZc].M~  
y: 0, 1.2 * I_max *cm^2 +)k%jIi!  
"intensity (W/ cm&sup2;)", @y [G>8N5@*  
y2: 0, 1.3 * N_Tm W&#Ps6)8  
frame FloCR=^H  
hx 3jZPv;9OC  
hy -`sK?*[{J  
Eyv%"+>  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 @W[`^jfQ  
  yscale = 2, :*u .=^
 
  color = gray, M>nplHq   
  width = 3, rJH u~/_Dq  
  maxconnect = 1, L'B= =#  
  "N_dop (right scale)" BF{v0Z0/}k  
HR]*75}e  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 ~,3+]ts='\  
  color = red, |re)]%A?Fu  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 7TD%vhbiwi  
  width = 3, Y> ElE-  
  "pump" '=C)Hj[D  
8;K'77h  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 bHZXMUewC  
  color = blue, O W`yv  
  maxconnect = 1, *WdnP.'Y  
  width = 3, {_T?0L  
  "signal" @px2/x  
+AkAMZ"Mg  
@'>h P  
; ------------- k|Mj|pqA  
diagram 5:                                  ！输出图表5 l&#&}3M  
*gF8"0s  
"TransitionCross-sections" 3pg_`  
'qel3Fs"  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) '*gY45yT`  
uflRW+-2  
x: 1450, 2050 ;%wQ
nhg  
"wavelength(nm)", @x +PT/pybA  
y: 0, 0.6 4+46z|  
"cross-sections(1e-24 m&sup2;)", @y d h5%  
frame K;j}qJvsb  
hx ukNB#2"  
hy 1@" L  
T6_LiB@  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 r0jhIE#  
  color = red, Tk1U  
  width = 3, y/{&mo1\  
  "absorption" K6 D3  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 fP 4  
  color = blue, $
;~  
  width = 3, 4FLL*LCNX  
  "emission" 'KL!)}B$h  
C.su<B?  

感谢，视频上有点看不清楚