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

(* #{GUu',?&  
Demo for program"RP Fiber Power": thulium-doped fiber laser,
m u(HNj  
pumped at 790 nm. Across-relaxation process allows for efficient \CL |=8[2  
population of theupper laser level. X|H%jdta  
*)            ！（*  *）注释语句 G|yX9C]R  
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diagram shown: 1,2,3,4,5  ！指定输出图表 SG8H~]CO)  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 _`L,}=um'  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 f8)D|  
; 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 8f% @  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 TdP_L/>|J  
; 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 &3>ki0L  
#H(|+WEu  
include"Units.inc"         ！读取“Units.inc”文件中内容 wYhWR
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include"Tm-silicate.inc"    ！读取光谱数据 3Qe:d_  
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; Basic fiberparameters:    ！定义基本光纤参数 (^Xp\dyZL  
L_f := 4 { fiberlength }      ！光纤长度 `pN"T?Pk  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 Lm9y!>1"O  
r_co := 6 um { coreradius }                ！纤芯半径 $g _h9L  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 3~BL!e,  
!'B.ad  
; Parameters of thechannels:                ！定义光信道 yyrCO"eh  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm :N%cIxrqP  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 6!/e_a  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ?};}#%971  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um g||{Qmr=1  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 U n2xZ[4  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 {.z2n>1J{T  
=lS~2C  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm _$0<]O$  
w_s := 7 um                          ！信号光的半径 (zBa2Vmmv  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 PX[taDN  
loss_s := 0                            ！信号光寄生损耗为0 ?)7uwJsH  
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R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 on(F8%]zE  
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; 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 J:'c
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calc %]>c4"H  
  begin 8N!E`{W  
    global allow all;                   ！声明全局变量 KB7CO:  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 7<AHQ<#@  
    add_ring(r_co, N_Tm); 0(ZER sP  
    def_ionsystem();              ！光谱数据函数 DL|,:2`  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 f$iv+7<B^  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 WDSkk"#TF  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 4/S4bk*8  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 v@LK3S/!3  
    finish_fiber();                                   n%3rv?m7  
  end; i15uHl  
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; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 ~o= Sxaf  
show "Outputpowers:"                                   ！输出字符串Output powers： K&9|0
xt  
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） wS <d8gw  
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） B1JdkL 3h  
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4!d&Zc>C4  
; ------------- v6HBO#F'V{  
diagram 1:                   !输出图表1  1SP)`Q  
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"Powers vs.Position"          ！图表名称 Iujly f  
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x: 0, L_f                      ！命令x: 定义x坐标范围 *.ri8  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 ]=2Ba<)m  
y: 0, 15                      ！命令y: 定义y坐标范围 XN5EZ#
  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 kUmrJBh$  
frame          ！frame改变坐标系的设置 Ji :2P*  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 7qA0bUee5  
hx             ！平行于x方向网格 gtyo~f  
hy              ！平行于y方向网格 rC14X}X6  
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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 >:Na^+c  
  color = red,  ！图形颜色 X_ne#ZPl  
  width = 3,   ！width线条宽度 >zFe)  
  "pump"       ！相应的文本字符串标签 7u6o~(  
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 CuR\JKdRo  
  color = blue,     ZvpcjP  
  width = 3, EQSOEf[
 
  "fw signal" xM8}Xo  
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 9s6@AJf  
  color = blue, 4{(uw  
  style = fdashed, XpdDIKMmE  
  width = 3, z~L''X7g  
  "bw signal" [pUw(KV2m  
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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 UZi^
 &
 
  yscale = 2,            ！第二个y轴的缩放比例 am{f<v,EI  
  color = magenta, &W-L`aFd0  
  width = 3, h8Q+fHDYv  
  style = fdashed, x9Y1v1!5Pu  
  "n2 (%, right scale)" QzPq^  
53J!iNnXT6  
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 ~YA* RCe  
  yscale = 2, gV$j ]  
  color = red, G+stt(k:  
  width = 3, #:s*)(Qn  
  style = fdashed, QG*=N {%5  
  "n3 (%, right scale)" vH%AXzIA  
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; ------------- 4sasf94  
diagram 2:                    ！输出图表2 'MRvH lCM  
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"Variation ofthe Pump Power" %@#+Xpa+  
rZ2X$FO@  
x: 0, 10 )uC],CbW{  
"pump inputpower (W)", @x
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y: 0, 10 k!3X4;F!_  
y2: 0, 100 Qz\yoI8JA,  
frame 11[[HkX@  
hx usH9dys,  
hy ,A`d!{]5  
legpos 150, 150 JQ=i{
9iJ  
Z"#eN(v.N  
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 g}"`@H(9r3  
  step = 5, |I-;CoAg  
  color = blue, 5Ds/^fA  
  width = 3, .) uUpY%K^  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 m^0r9y
,  
  finish set_P_in(pump, P_pump_in) F-[zuYGp  
mbB,j~;^6H  
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 uPKq<hBI  
  yscale = 2, 1^XuH('  
  step = 5, #N^TqOr  
  color = magenta, !l|
vO(  
  width = 3, I$/*Pt];  
  "population of level 2 (%, rightscale)", nlmc/1C  
  finish set_P_in(pump, P_pump_in) O4RNt,?l  
QA>(}u\+  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 7ksh%eV  
  yscale = 2, e8g"QDc  
  step = 5, YL-/z4g  
  color = red, 9zSHn.y  
  width = 3, `q|&;wP.  
  "population of level 3 (%, rightscale)", xxkUu6x#  
  finish set_P_in(pump, P_pump_in) J@D5C4>i  
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!$Aijd s5  
; ------------- ;,P-2\V/  
diagram 3:                         ！输出图表3 (uW/t1  
:W]?6=  
"Variation ofthe Fiber Length" u$ [R>l9  
#:C;VAAp  
x: 0.1, 5 Vij P;  
"fiber length(m)", @x ~f=~tN)hZ  
y: 0, 10 QK _1!t3  
"opticalpowers (W)", @y GslUN% UJr  
frame uo0g51%9  
hx \{r-e  
hy 3 i<,#FaL  
^kZfE"iE2  
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 h'VN& T,  
  step = 20,             x
g=}MoX  
  color = blue, 5v"r>q[ X  
  width = 3, 3sG7G:4  
  "signal output" Vp8t8X1`  
3jF#f'*  
;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 }$M 2XF  
   step = 20, color = red, width = 3,"residual pump"
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+  
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! set_L(L_f) {restore the original fiber length } dmh6o
 *  
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; ------------- b3(pRg[Fp  
diagram 4:                                  ！输出图表4 +5J"G/f  
9~+A<X]Hd  
"TransverseProfiles" *9:oTN  
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I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) RmS|X"zc  
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x: 0, 1.4 * r_co /um ' JHCf  
"radialposition (µm)", @x 
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y: 0, 1.2 * I_max *cm^2 YnnpgR.  
"intensity (W/ cm&sup2;)", @y l;i,V;@t  
y2: 0, 1.3 * N_Tm ]zp5 6U|xa  
frame Bvzu{B%  
hx 0kN;SSX!  
hy xml@]N*D#E  
B;9"=0  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 z;1y7W!v  
  yscale = 2, [8*Ovd  
  color = gray, xdWfrm$;ZA  
  width = 3, p.K
X[I  
  maxconnect = 1, d,=Kv  
  "N_dop (right scale)" =H*}{'#  
=`2nv0%2  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 1-Fg_G}|6  
  color = red, =4GJYhj  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 7q bGA K  
  width = 3, K/RQ-xd4  
  "pump" PfX{n5yBW8  
{zoUU  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 ~ILig}I  
  color = blue, j]7|5mC78  
  maxconnect = 1, ?]%JQ]Gf*  
  width = 3, Z=%+U _,  
  "signal" /UeLf$%ZW  
"%~\kJ(G  
V~LZ%NZ8  
; ------------- &pwSd  
diagram 5:                                  ！输出图表5 $iQ>c6  
t}
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"TransitionCross-sections" yu"Ii-9z  
lhg3 }dW  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) f@l6]z{.L  
1lyJ;6i6L  
x: 1450, 2050 :PtpIVAosg  
"wavelength(nm)", @x d7N;Fa3yL  
y: 0, 0.6 k5G(7Ug=g~  
"cross-sections(1e-24 m&sup2;)", @y <B6@q4Q  
frame CCKg,v  
hx $mm =$.  
hy *nNzhcuR  
2&91C[da0  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 JV'd!5P  
  color = red, 1A^iUC5)  
  width = 3, zi:F/TlUC  
  "absorption" q0WW^jwQ  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 J*6I@_{/U  
  color = blue, 2{s ND  
  width = 3, gd<8RVA  
  "emission" }]vj"!?a  
O;M_?^'W  

感谢，视频上有点看不清楚