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

(* qAW?\*n5N  
Demo for program"RP Fiber Power": thulium-doped fiber laser, )>;V72  
pumped at 790 nm. Across-relaxation process allows for efficient A-f,&TO  
population of theupper laser level. i`^[_  
*)            ！（*  *）注释语句 e#odr{2#4u  
EE5mVC&  
diagram shown: 1,2,3,4,5  ！指定输出图表 0s!';g Q  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 s8.SEk|pB  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 pD17r}%  
; 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 Xe2Zf  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 wl/1~!  
; 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 Yfr4<;%  
I7XJPc4}   
include"Units.inc"         ！读取“Units.inc”文件中内容 L%HFsuIO-  
.]YTS
 
include"Tm-silicate.inc"    ！读取光谱数据 '!<gPAVTzV  
;<l#k7/  
; Basic fiberparameters:    ！定义基本光纤参数 I
Xv9mr?H}  
L_f := 4 { fiberlength }      ！光纤长度 Q.,2G7[ <  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 2rxz<ck(  
r_co := 6 um { coreradius }                ！纤芯半径 txik{' :  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 l
 i) 5o  
\b*z<Odv  
; Parameters of thechannels:                ！定义光信道 (vFO'jtcB-  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm v>/_U  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 X/ lmj_v  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W A
y0.D FL  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um G^Va$ike  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 T^icoX=c4  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 d
J{q}U  
,lcSJ^yr  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm UDW_?SHAx  
w_s := 7 um                          ！信号光的半径 \}71pzw(  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 B \LmE+a>  
loss_s := 0                            ！信号光寄生损耗为0 l[<U UEjZJ  
8d7 NESYl  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 G%ZP`  
8j)*T9  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 H[RX~Xk2E  
calc yoH,4,!G  
  begin K\FLA_J  
    global allow all;                   ！声明全局变量 _FxeZ4\  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 &y&HxV  
    add_ring(r_co, N_Tm); m*.+9 6  
    def_ionsystem();              ！光谱数据函数 :$*@S=8O  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 ^yX>
^1  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 "hk {"0E  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 JwQ/A[b  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 1Qw_P('}  
    finish_fiber();                                   &z#`Qa3NI  
  end; SBI*[
 
J7Mbv2
D  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 yy Y\g  
show "Outputpowers:"                                   ！输出字符串Output powers： ]$=#:uf  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） k [LV^oEg  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） 8S7#tb@3  
1obajN  
d(yTz&u)  
; ------------- GvZ[3GT  
diagram 1:                   !输出图表1 Zo,066'+[.  
c:[ZknnCe  
"Powers vs.Position"          ！图表名称 &->ngzg  
k{H7+;_  
x: 0, L_f                      ！命令x: 定义x坐标范围 1|m%xX,[  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 JT&RaFX  
y: 0, 15                      ！命令y: 定义y坐标范围 L5'?.9]  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 O?O=]s u  
frame          ！frame改变坐标系的设置 4fL`.n1^  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） v-BQ>-&
s  
hx             ！平行于x方向网格 bObsj]  
hy              ！平行于y方向网格 >g m  
G\o9mEzQ  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 TbaZFLr  
  color = red,  ！图形颜色 d8iq9AP\o  
  width = 3,   ！width线条宽度 53 -Owjpx  
  "pump"       ！相应的文本字符串标签 :a^/&LbLm  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 &isKU8n  
  color = blue,    
P)cEYk  
  width = 3, u HW'F(;  
  "fw signal" [N12X7O3  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 :yRv:`r3Lt  
  color = blue, oKCv$>Y  
  style = fdashed, #IJeq0TVB  
  width = 3, A$]s{`  
  "bw signal" 91]sO%3  
+H28F_#  
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 XDHi4i47`o  
  yscale = 2,            ！第二个y轴的缩放比例 )_1 GPS  
  color = magenta, j8nkNE]&  
  width = 3, LM+d3|gSV  
  style = fdashed, P8Wv&5A  
  "n2 (%, right scale)" [Ky3WppR  
~d].<Be  
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 ]jYFrOMy4S  
  yscale = 2, R1D ;  
  color = red, N/ f7"~+`  
  width = 3, {VKFw=$8  
  style = fdashed, PfZS"yk  
  "n3 (%, right scale)" {0j_.XZ  
Nke!!A}\|  
o+B)  
; ------------- bK.*v4RG  
diagram 2:                    ！输出图表2 fvcS=nR
Qv  
7}g4ePYag  
"Variation ofthe Pump Power" 6JDaZh"=K  
R|v'+bv  
x: 0, 10 g`%in  
"pump inputpower (W)", @x eZaSV>27  
y: 0, 10 tc<uS%XT4^  
y2: 0, 100 AYgXqmH~+  
frame #c
5jCy}n  
hx R(`:~@3\6  
hy ^lAM /   
legpos 150, 150 }f]Y^>-Ux  
OQ7 `n<I<)  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 YZj*F-}  
  step = 5, BHf$ %?3z,  
  color = blue, h693TS_N  
  width = 3, 7jgj;%  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 IHYLM;@L  
  finish set_P_in(pump, P_pump_in) 6,aH[>W  
_$ivN!k  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 ;4[[T%&v  
  yscale = 2, Dlq!:dF{&  
  step = 5, mL=d EQ  
  color = magenta, %VH,(}i  
  width = 3, REU,"  
  "population of level 2 (%, rightscale)", ~/]]H;;^u  
  finish set_P_in(pump, P_pump_in) o`,~#P|  
lQ-<T<g  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 =9X1+x  
  yscale = 2, lI
4tW=  
  step = 5, 8HQ.MXKP  
  color = red, d51'[?(  
  width = 3, &cSVOsi  
  "population of level 3 (%, rightscale)", L%T(H<G  
  finish set_P_in(pump, P_pump_in) P"8Ix  
8o$rF7.-  
yQE'!m  
; ------------- eHyUY&N/  
diagram 3:                         ！输出图表3 l6ym <V(1p  
Wn'a'  
"Variation ofthe Fiber Length" <Gi%+I@szl  
n4/Wd?#`  
x: 0.1, 5 qcS.=Cj?)  
"fiber length(m)", @x W<r<K=`5P  
y: 0, 10 Zd6ik&S   
"opticalpowers (W)", @y ;:fW]5"R  
frame wSN9`"  
hx x9vSekV  
hy @PEFl"  
c3^!S0U  
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 @ph!3<(In,  
  step = 20,             OT%E|) 6'  
  color = blue, ?T/]w-q>  
  width = 3, z3jkxWAZ  
  "signal output" UqOBr2UmG  
X.eOw>.
 
;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 _&uJE&xl}  
   step = 20, color = red, width = 3,"residual pump" At'CT5=  
@-'a{hBR  
! set_L(L_f) {restore the original fiber length } "lI-/G  
1f`De`zXzr  
Y~WdN<g  
; ------------- 0O9b 7F  
diagram 4:                                  ！输出图表4 ;=Ma+d#  
s-$Wc)l  
"TransverseProfiles" i6WH^IQM  
Y%XF64)6  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) bj pruJ`=  
tk&AZb,sP  
x: 0, 1.4 * r_co /um ; oyV8P$  
"radialposition (µm)", @x 2R[v*i^S  
y: 0, 1.2 * I_max *cm^2 >}+{;d  
"intensity (W/ cm&sup2;)", @y jE\G_>  
y2: 0, 1.3 * N_Tm gV2vwe  
frame V\cbIx(Z^  
hx r5}p .  
hy =AIFu\9#a`  
^M'(/O1  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 L ;L:  
  yscale = 2, YThVG0I =  
  color = gray, x>yqEdR=o  
  width = 3, (?jK|_  
  maxconnect = 1, h>/teHy /  
  "N_dop (right scale)" uUI#^ A  
k=]e7~!  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 (
Q*q#U  
  color = red, >jW
**F  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 \'m7un  
  width = 3, B\J[O5},
 
  "pump" >Xn,jMUW  
,:?ibE=  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 5pCicwea#  
  color = blue, -9b=-K.y  
  maxconnect = 1, _3`GZeGV  
  width = 3, 4uXGpsL  
  "signal" $*C }iJsF  
Kxsd@^E  
gP%<<yl  
; ------------- !j6k]BgZ  
diagram 5:                                  ！输出图表5 TO6F  
Y~UuT8-c  
"TransitionCross-sections" 9xQ|Uad+%  
:3D8rqi:  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) :Awwt0  
Wg|6{'a  
x: 1450, 2050 xWxHi6U(  
"wavelength(nm)", @x opfnIkCe  
y: 0, 0.6 56Wh<i3  
"cross-sections(1e-24 m&sup2;)", @y f(Xin3#'  
frame v;(cJ,l  
hx V%R]jbHZ#  
hy /@`"&@W'  
lQIg0G/3  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 f#s6 'g  
  color = red, 7ys' [G|}r  
  width = 3, Ku[q#_7  
  "absorption" [G_ ;78  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 h% -=8l,  
  color = blue, b
8@}Jv  
  width = 3, z 0?MeH#  
  "emission" C. .|O  
K_MEd1l  

感谢，视频上有点看不清楚