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

(* gRqz8UI  
Demo for program"RP Fiber Power": thulium-doped fiber laser, EEo+#  
pumped at 790 nm. Across-relaxation process allows for efficient cEQa 6  
population of theupper laser level. VmT5?i   
*)            ！（*  *）注释语句 pF!vW  
x)U;  
diagram shown: 1,2,3,4,5  ！指定输出图表 '+QgZ>q
"  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 v*^2[pf  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 L"-&B$B:  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 ut,"[+J  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 U92hv~\  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 v4.V%tg!  
QA9vH'  
include"Units.inc"         ！读取“Units.inc”文件中内容 ;yXnPAtJ  
^}[ N4  
include"Tm-silicate.inc"    ！读取光谱数据 ixH7oWH#  
nagto^5X  
; Basic fiberparameters:    ！定义基本光纤参数 p}!pT/KmpH  
L_f := 4 { fiberlength }      ！光纤长度 ?-Z:N`YP  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 [}Iq-sz;0  
r_co := 6 um { coreradius }                ！纤芯半径 |V7a26h  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ~VGK#'X:  
sI'HS+~pU  
; Parameters of thechannels:                ！定义光信道 puyL(ohem  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm lyeoSd1AN  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 K;ML'  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W lpM{@JC  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um u'b_zlW@  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 ;(,Fe/wvC  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 gc:>HX);)  
qs b4@jt+  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm _L72Ae(_  
w_s := 7 um                          ！信号光的半径 \* #4  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 =>J#_Pprn  
loss_s := 0                            ！信号光寄生损耗为0 )5v .9N6v  
Qw-qcG  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 s#fmGe"8  
f$'D2o, O  
; 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 ?yb{DZ46  
calc :F\f}G3  
  begin OY#_0p)i  
    global allow all;                   ！声明全局变量 m>!#}EJ|  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 Q!{Dw:7  
    add_ring(r_co, N_Tm); I$LO0avvH2  
    def_ionsystem();              ！光谱数据函数 !;a<E:  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 ATHz~a  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 J"MJVMo$T  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 @$R a  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 [ub\DLl  
    finish_fiber();                                   3"n8B6
 
  end; jg8P4s  
M
2S|$6t:  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 I2T2'_I  
show "Outputpowers:"                                   ！输出字符串Output powers： UXJl;Mb  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） wp*1HnWj8Y  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） YLo$n  
}b(e  
#w@Pa L iS  
; ------------- J
;`~ !g  
diagram 1:                   !输出图表1 (I.`bR  
xW4+)F5P(  
"Powers vs.Position"          ！图表名称 e8 aV qq[  
"tARJW  
x: 0, L_f                      ！命令x: 定义x坐标范围 cFvx*n  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 W
U\bJ}  
y: 0, 15                      ！命令y: 定义y坐标范围 z;
fSd  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 *% *^a\2  
frame          ！frame改变坐标系的设置 /f<(K-o]  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） WRyLpTr-  
hx             ！平行于x方向网格 B vc=gW  
hy              ！平行于y方向网格 bn35f<+  
X%CPz.G  
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 2A|6o*s"  
  color = red,  ！图形颜色 v!xrUyN~m  
  width = 3,   ！width线条宽度 w
#,v n8  
  "pump"       ！相应的文本字符串标签 a6E"  
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 GcCs}(eo  
  color = blue,     G |^X:+  
  width = 3, I "2FTGA  
  "fw signal" w"iZn  
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 4?&a?*M  
  color = blue, R <\Yg3m8  
  style = fdashed, ooSd6;'  
  width = 3, AHY)#|/)  
  "bw signal" E|  
Q{hOn]"  
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 ="R6YL  
  yscale = 2,            ！第二个y轴的缩放比例 pH%c7X/[3L  
  color = magenta, qu+2..3  
  width = 3, -%l,Zd9  
  style = fdashed, :q<%wLs  
  "n2 (%, right scale)" 2kq@*}ys  
E(_I3mftm  
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 qXGLv4c`Q  
  yscale = 2, y03a\K5[KQ  
  color = red, F@bCm+z-  
  width = 3, ~HRWKPb  
  style = fdashed, j]O[I^5  
  "n3 (%, right scale)" #%"
TU,[+  
EsB'nf r  
N-YZ0/c  
; ------------- g GT,PP(k  
diagram 2:                    ！输出图表2 no6]{qn=6  
G3^]Wwu  
"Variation ofthe Pump Power" mm<iT59  
4(GgaQFO?  
x: 0, 10 Q8cPKDB  
"pump inputpower (W)", @x an[~%vxw}  
y: 0, 10 72vGfT2HtZ  
y2: 0, 100 1|w:xG^  
frame 'OW"*b  
hx 4$GRCq5N;  
hy 6_K#,_oZ  
legpos 150, 150 @b\_696.  
E(+wl  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 N:jiZ)  
  step = 5, .r%|RWs6W  
  color = blue, >1pH 91c'  
  width = 3, oe|<xWu  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 x0$:"68PW  
  finish set_P_in(pump, P_pump_in) i=H>D  
Le:mMd= 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 7h&`BS  
  yscale = 2, '=G Ce%A  
  step = 5, gJ8 c]2c  
  color = magenta, LNxE-Dp  
  width = 3, :fKz^@mY4  
  "population of level 2 (%, rightscale)", h]DECd{  
  finish set_P_in(pump, P_pump_in) #]a51Vss  
B%:9P  
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 aC Lg~g4  
  yscale = 2, jTUf4&b-  
  step = 5, "M0l;  
  color = red, #L= eK8^e  
  width = 3, KM(9&1/  
  "population of level 3 (%, rightscale)", 9.OwH(Ax7  
  finish set_P_in(pump, P_pump_in) z/&a\`DsU  
"mK i$FV  
R{KIkv  
; ------------- nC.2./OwMf  
diagram 3:                         ！输出图表3 +y4AUU:Q  
! }?jCpp  
"Variation ofthe Fiber Length" {r2|fgi  
JrWBcp:Y  
x: 0.1, 5 c^bk:=uj  
"fiber length(m)", @x 5~%,u2  
y: 0, 10 {AL9o2  
"opticalpowers (W)", @y XL/oy'_  
frame =<zSF\Zr_  
hx P(gVF|J?  
hy U;
Ll.BFP  
V52C,]qQH  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 V]kGcS}  
  step = 20,             eQaxZMU  
  color = blue, sqpOS!
]  
  width = 3, PWN'.HQ  
  "signal output" CL'Xip')T  
m_Ac/ctf  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 5-WRv;  
   step = 20, color = red, width = 3,"residual pump" m":SE?{{&  
.i&ZT}v3  
! set_L(L_f) {restore the original fiber length } T'b/]&0Tio  
l*\~ew  
W aGcoj  
; ------------- @-&(TRbZo  
diagram 4:                                  ！输出图表4 #DK3p0d  
!MJe+.  
"TransverseProfiles" ;y~{+{{Ow  
)x8;.@U  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) %w8GGm8^/  
c6Aut`dK  
x: 0, 1.4 * r_co /um ~l*?D7[o  
"radialposition (µm)", @x H&=n:'k^  
y: 0, 1.2 * I_max *cm^2 r -q3+c^+  
"intensity (W/ cm&sup2;)", @y 6(J4IzZ  
y2: 0, 1.3 * N_Tm (YYj3#|  
frame G]mWaA  
hx ,s><kHJ  
hy M9s43XL(&  
pgd8`$(Q  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 %t~SOkx  
  yscale = 2, (e8G (  
  color = gray, o`\.I&Ij  
  width = 3, Vp]D  
  maxconnect = 1, ]KXMGH_  
  "N_dop (right scale)" "\/^/vn?  
t`Y!"l  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 ![@T iM  
  color = red, R{) Q1~H=q  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 hH1lgc  
  width = 3, Wyq~:vU.S  
  "pump" MZ5Y\-nq\  
Cl6m$YUt  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 @1qdd~B}  
  color = blue, Jh43)#G-  
  maxconnect = 1, !0ce kSesr  
  width = 3, l 70,Jo?78  
  "signal" &v$,pg%-:  
v.Xoq  
-*|:v67C&  
; ------------- 3T|Y}  
diagram 5:                                  ！输出图表5 JvfQib  
yOWOU`y?  
"TransitionCross-sections" Zn@W7c,_I  
}qiF^D}  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) L\}Pzxn  
-!J2x8Ri  
x: 1450, 2050 &:c:
9w  
"wavelength(nm)", @x T~%H%O(F  
y: 0, 0.6 BrJ o!@<  
"cross-sections(1e-24 m&sup2;)", @y aXdf>2c{JD  
frame i s L{9^  
hx 2'wr={>W  
hy 4l&"]9D  
E &7@#'l  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 Mlv<r=E  
  color = red, =s'XR@  
  width = 3, 4E=0qbt8  
  "absorption" Mo}H_8y  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 L 42|>%uo  
  color = blue, 8FzHNG  
  width = 3, r8uqcKfU  
  "emission" 8RdP:*HY  
|l|_
dn  

感谢，视频上有点看不清楚