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小火龙果 2020-05-28 16:28

RP Fiber Power仿真设计掺铥光纤激光器代码详解

(* #$>m`r  
Demo for program"RP Fiber Power": thulium-doped fiber laser, RnkrI~x  
pumped at 790 nm. Across-relaxation process allows for efficient 0~XZ  
population of theupper laser level. ZA4vQDW  
*)            !(*  *)注释语句 Vz&!N/0i  
[& &9F};  
diagram shown: 1,2,3,4,5  !指定输出图表 2^7VDqLc  
; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 i/U HDqZ  
; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 1e#}+i!a  
; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 J;g+  
; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 'e>0*hF[  
; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 wGf SVA-q\  
uD''0G\  
include"Units.inc"         !读取“Units.inc”文件中内容 3 tp'}v  
3Ga! )  
include"Tm-silicate.inc"    !读取光谱数据 H?>R#Ds-  
8?O6IDeW  
; Basic fiberparameters:    !定义基本光纤参数 x-/`c  
L_f := 4 { fiberlength }      !光纤长度 R"=pAO.4l  
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 !7lS=D(?  
r_co := 6 um { coreradius }                !纤芯半径 zj^Ys`nl  
N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 E(oI0*S.5  
X)|b_3Z  
; Parameters of thechannels:                !定义光信道 QuJ)WaJkC  
l_p := 790 nm {pump wavelength }                !泵浦光波长790nm ]?`t spm<t  
dir_p := forward {pump direction (forward or backward) }   !前向泵浦 tPHDnh^n]  
P_pump_in := 5 {input pump power }                    !输入泵浦功率5W +idj,J|  
w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um qffXm `k  
I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 g3(fhfR'RN  
loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 !(soMv  
Q!:J.J  
l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm gI qYIt  
w_s := 7 um                          !信号光的半径 I7hE(2!$  
I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 [s4lSGh  
loss_s := 0                            !信号光寄生损耗为0 .ns1;8  
 c6;tbL  
R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率  T^ ^o  
Lh6G"f(n  
; 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 &C+pen) Z  
calc /,z4tf  
  begin "3A.x1uQ  
    global allow all;                   !声明全局变量 !K#Q[Ee  
    set_fiber(L_f, No_z_steps, '');        !光纤参数 Ax4nx!W,   
    add_ring(r_co, N_Tm); eEkF Zx  
    def_ionsystem();              !光谱数据函数 Yqy7__vm  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 3EN?{T<yf  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 D}wM$B@S  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 "]81+ D  
    set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 V_?5cwZ  
    finish_fiber();                                   z )2h\S  
  end; k1HukGa  
|"vUC/R2&  
; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 N*N@wJy:5  
show "Outputpowers:"                                   !输出字符串Output powers: @54D<Lj  
show"pump:     ", P_out(pump):d3:"W"  !输出字符串pump:和计算值(格式为3个有效数字,单位W) `g&<7~\=A  
show"signal:   ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) A=/|f$s+  
'Jww}^h1  
QXnL(z  
; ------------- 'PF?D~  
diagram 1:                   !输出图表1 vd>X4e ^j  
JB~79Lsdz  
"Powers vs.Position"          !图表名称 AXhV#nZt0  
.V9/0  
x: 0, L_f                      !命令x: 定义x坐标范围 sXdNlR&  
"position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 A"8` 5qa  
y: 0, 15                      !命令y: 定义y坐标范围 #8G (r9  
y2: 0, 100                    !命令y2: 定义第二个y坐标范围 ~{hcJ:bI  
frame          !frame改变坐标系的设置 JW;DA E<  
legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) u;m[,  
hx             !平行于x方向网格 6C>"H  
hy              !平行于y方向网格 5"=qVmT)  
1-4iy_d  
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 wiXdb[[#  
  color = red,  !图形颜色 ?r"'JO.w  
  width = 3,   !width线条宽度 S+G!o]&2  
  "pump"       !相应的文本字符串标签 &)@|WLW  
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 fJ_d ,4  
  color = blue,     M[N$N`9  
  width = 3, M}E0Msq_o  
  "fw signal" KiU/N$ E  
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 <\< [J0  
  color = blue, 3VZeUOxY\W  
  style = fdashed, '`$z!rA  
  width = 3, X(nbfh?n  
  "bw signal" bLyU;  
\M-}(>Pfk  
f: 100 * n(x, 2),    !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 }=CL/JHz  
  yscale = 2,            !第二个y轴的缩放比例 T >X nVK  
  color = magenta, u-g2*(ZT  
  width = 3, y%A!|aBu  
  style = fdashed, =c 3;@CO  
  "n2 (%, right scale)" @~v |t{G  
eHUr!zH:  
f: 100 * n(x, 3),          !n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 bM[!E8dF  
  yscale = 2, .}W#YN$  
  color = red, m%Ah]x;  
  width = 3, B2\R#&X.  
  style = fdashed, x9Veg4Z7  
  "n3 (%, right scale)" X_yAx)Do  
<WN?  
gPs%v`y)*D  
; ------------- +cS%b}O`$  
diagram 2:                    !输出图表2 ?}4 =A&][  
a g Za+a  
"Variation ofthe Pump Power" 0Q^ -d+!  
(\^| @  
x: 0, 10 ^V]DQ%v"I  
"pump inputpower (W)", @x GRV#f06  
y: 0, 10 Y)*5M  
y2: 0, 100 @Sb 86Ee  
frame 9aYDi)  
hx tHlKo0S$0  
hy oxkA+}^j8M  
legpos 150, 150 <i9pJGW  
;8z40cD  
f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 tmM8YN|  
  step = 5, ~ZbEKqni2  
  color = blue, [C)JI;\  
  width = 3, ^MJTlRUb  
  "signal output power (W, leftscale)",     !相应的文本字符串标签 {k.Dy92  
  finish set_P_in(pump, P_pump_in) @]$qJFXx  
M>H4bU(  
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 ?M'_L']N[  
  yscale = 2, .I%p0ds1r  
  step = 5, %YjZF[P  
  color = magenta, q:A{@kFq_  
  width = 3, `uRf*-   
  "population of level 2 (%, rightscale)", VO"f=gFg  
  finish set_P_in(pump, P_pump_in) Hd)z[6u8eT  
A#&Q(g\YE  
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 tEEeek(!  
  yscale = 2, o(iv=(o  
  step = 5, |~Q`D dkX  
  color = red, b"x[+&%i  
  width = 3, TE+d?  
  "population of level 3 (%, rightscale)", rG7S^,5o  
  finish set_P_in(pump, P_pump_in) WU oGIT'  
\Kh@P*7  
y>+xdD0 +  
; ------------- s':fv[%  
diagram 3:                         !输出图表3 !_{2\ &  
+QS7F`O  
"Variation ofthe Fiber Length" Efo,5  
E8]PV,#xY  
x: 0.1, 5 UPtWj8h  
"fiber length(m)", @x YXC?q  
y: 0, 10 ni @Mqb  
"opticalpowers (W)", @y cZ$!_30N+  
frame rTJv>Jjld  
hx mG,%f"b0  
hy J)6A,:wt  
QW ~-+BD  
f: (set_L(x);P_out(signal_fw)),     !改变光纤长度对信号光输出功率的影响 \VW&z:/*pZ  
  step = 20,             }Ip"j]h  
  color = blue, **I9Nw!IH  
  width = 3, RfPRCIo  
  "signal output" QInow2/u  
~i)O^CKq  
;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 @d5G\1(%  
   step = 20, color = red, width = 3,"residual pump" rV LUT  
Ydv\a6  
! set_L(L_f) {restore the original fiber length } C9oF*{  
Kgi| 7w  
i?^C c\gH  
; ------------- U'i L|JRF  
diagram 4:                                  !输出图表4 j\w>}Pc  
:P$I;YY=A  
"TransverseProfiles" p{:r4!*L  
QiU!;!s  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Ck,.4@\tK  
,WF)GS|7V  
x: 0, 1.4 * r_co /um "P:kZ= M Q  
"radialposition (µm)", @x }`/wj  
y: 0, 1.2 * I_max *cm^2 .ON+ ( #n  
"intensity (W/ cm&sup2;)", @y *qcL(] Yq  
y2: 0, 1.3 * N_Tm C7=Q!UK`\  
frame + ~ro*{3  
hx f[)_=T+  
hy ^ K8JE,  
#80*3vi~F  
f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 *"E?n>b  
  yscale = 2, &k3'UN!&Ix  
  color = gray, I>b-w;cC  
  width = 3, )2X ng_,  
  maxconnect = 1, "A jtNL5  
  "N_dop (right scale)" DI=Nqa)r  
t;+6>sTu  
f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 NEQcEUd?  
  color = red, lj"L Q(^  
  maxconnect = 1,           !限制图形区域高度,修正为100%的高度 Fi{~UOZg  
  width = 3, xh> /bU!>  
  "pump" ;??wLNdf-  
sY,!Ir`/`  
f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 hoASrj{s  
  color = blue, n5_r 3{  
  maxconnect = 1, JH!qGV1  
  width = 3, ;% *e}w0  
  "signal" v>Il #  
9/w'4bd  
<p(&8P  
; ------------- :=04_5 z  
diagram 5:                                  !输出图表5 zY8"\ZB  
lh* m(  
"TransitionCross-sections" RVfRGc^lK  
$4kc i@.  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) G#'3bxI{f+  
B$7m@|p!  
x: 1450, 2050 c1/G yq  
"wavelength(nm)", @x uAyj##H  
y: 0, 0.6 : o$ R@l  
"cross-sections(1e-24 m&sup2;)", @y H<`[,t  
frame < W,k$|w  
hx #ITx[X89|  
hy vnz.81OR  
eEJ8j_G  
f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 SPsq][5eR  
  color = red, .]ZM2  
  width = 3, (?R  
  "absorption" ZP?k|sEH  
f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 9G_=)8sOV  
  color = blue, 1L'[DKb'  
  width = 3, oO @6c%  
  "emission" ^iubqtT]  
S^)r,cC  
lileisgsz 2021-09-28 09:47
感谢,视频上有点看不清楚
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