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

(* )!caOGvhJ  
Demo for program"RP Fiber Power": thulium-doped fiber laser, yn_.  
pumped at 790 nm. Across-relaxation process allows for efficient 6(uZn=  
population of theupper laser level. e9tb]sAG  
*)            ！（*  *）注释语句 vxLr034  
Nu\<Xr8  
diagram shown: 1,2,3,4,5  ！指定输出图表
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; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 C'R6mz%Q?  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 &I(\:|`o  
; 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 YbnXAi\y|  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 x5V))~Ou  
; 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 |lg jI!iK  
z Tz_"NI  
include"Units.inc"         ！读取“Units.inc”文件中内容 "v(pluN|  
ICr.Gwe3_  
include"Tm-silicate.inc"    ！读取光谱数据 Jj5VBI!Ok  
W&&|T;P<J  
; Basic fiberparameters:    ！定义基本光纤参数 [u37Hy_Gi  
L_f := 4 { fiberlength }      ！光纤长度 s{
8=Q0^  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 EtaKo}!A}  
r_co := 6 um { coreradius }                ！纤芯半径
4y?n62N8$  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 &/ED.K  
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; Parameters of thechannels:                ！定义光信道 N
O@`*:.^Y  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm BzkfB:wr  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 gIusp917  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W a]xGzv5  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um u@`a~  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 h]+;"v6 /  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 (Y8LyY  
VJT /9O)Z|  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm Yf~Kzv1]*  
w_s := 7 um                          ！信号光的半径 lX)AbK]nb  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 3\ ,t_6}  
loss_s := 0                            ！信号光寄生损耗为0 R=<::2_Y96  
0"T/a1S7bl  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 CCol>:8{P  
ViMl{3  
; 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 "
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calc v'b%m8  
  begin G &NK  
    global allow all;                   ！声明全局变量 %7P]:G+Y\  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 |+::sL\r  
    add_ring(r_co, N_Tm); :KA)4[#;W  
    def_ionsystem();              ！光谱数据函数 $/tj<++W  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 b;5j awG  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 a0gg<Ml  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 ~:o$}`mW  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ipg`8*My  
    finish_fiber();                                   sQkijo.  
  end; ]+3M\ ib  
7aKI=;60.  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 ge.>#1f}  
show "Outputpowers:"                                   ！输出字符串Output powers： \k`9s q  
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） 6$=>ckP  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） yiI oqvP  
czpu^BT;;T  
<FBBR2  
; ------------- 8.N`^Nj 1  
diagram 1:                   !输出图表1 ?[m1?  
, QWu
s"5H  
"Powers vs.Position"          ！图表名称 Sw,*#98  
*fIn<Cc  
x: 0, L_f                      ！命令x: 定义x坐标范围 oYTLC@98}  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 ".$kOH_:  
y: 0, 15                      ！命令y: 定义y坐标范围 /.CS6W^z  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ;nQ=! .#Q  
frame          ！frame改变坐标系的设置 LjE3|+pJ  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 1zH?.-  
hx             ！平行于x方向网格 :i& 9}\|,  
hy              ！平行于y方向网格 3*2~#dh=  
K8MET&  
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 ng9e)lU~*b  
  color = red,  ！图形颜色 LQ4:SV'3  
  width = 3,   ！width线条宽度 h]t v+\0  
  "pump"       ！相应的文本字符串标签 O65`KOPn  
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 +h+ 7Q'k  
  color = blue,     ?O#,{ZZf=  
  width = 3, N\B&|;-V  
  "fw signal" [J}eNprg  
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 Nr `R3(X  
  color = blue, d;0]xG?%=  
  style = fdashed, ;*j 
K!  
  width = 3, b~:)d>s8wY  
  "bw signal" OZe&p  
R@z`  
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 ;hO6 p  
  yscale = 2,            ！第二个y轴的缩放比例 BlU&=;#r5>  
  color = magenta, YX-j|m|  
  width = 3, ."^\1N(.n  
  style = fdashed, }*QK;#NEc  
  "n2 (%, right scale)" Wq<oP  
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[  
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 iJ^}{-  
  yscale = 2, p|A ?F0  
  color = red, >.`*KQdan  
  width = 3, K;sC#9m  
  style = fdashed, ?2~fvMWu  
  "n3 (%, right scale)" 2XeyNX  
OzrIiahz/  
a`%`9GD  
; ------------- 3lZl  
diagram 2:                    ！输出图表2 0{z8pNrc  
3w"JzC@  
"Variation ofthe Pump Power" ='b)6R  
O{~Xp!QQt  
x: 0, 10 |6bvUFr  
"pump inputpower (W)", @x >zX^*T#  
y: 0, 10 .-M5.1mo\(  
y2: 0, 100 CE96e y  
frame JfWkg`LqL  
hx >\<eR]12  
hy :2S?|7U4  
legpos 150, 150 nng|m  
)M+po-6
$1  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 8}:$=n4&  
  step = 5, EF\OM?R  
  color = blue, IS(F_< .  
  width = 3, \UZGXk  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 iw/~t  
  finish set_P_in(pump, P_pump_in) >xS({1A}  
sU&v B:]~  
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 q#mL-3OQ  
  yscale = 2, Q%d%Io\-t  
  step = 5, "Ux(n
t  
  color = magenta, u3O@ccJ;  
  width = 3, :E6*m\X!3  
  "population of level 2 (%, rightscale)", d;l%XZe  
  finish set_P_in(pump, P_pump_in) f<wYJGI  
_d3Z~cH  
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 ^;a .;wR  
  yscale = 2, ( `bb1g
z  
  step = 5, PbZ%[F  
  color = red, %\48hSe  
  width = 3, [T =>QS@g  
  "population of level 3 (%, rightscale)", 8=L"rekV_  
  finish set_P_in(pump, P_pump_in) Bh=t%#y|`  
>YWK"~|i~  
K<5yjG8&  
; ------------- :s_.K'4?a  
diagram 3:                         ！输出图表3 }B7Txo,Z  
~8nR3ki  
"Variation ofthe Fiber Length" &2XH.$Q  
"y"oV[`  
x: 0.1, 5 "i#g [x  
"fiber length(m)", @x &t<gK D  
y: 0, 10 5?`4qSUz  
"opticalpowers (W)", @y ~$K{
E[^<  
frame 5|~g2Zz{;  
hx vFdI?(c-  
hy @H#Fzoo.  
Sdmz(R  
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 "*<vE7  
  step = 20,             CUH u=  
  color = blue, m85ZcyW1T  
  width = 3, RN)XIf$@_  
  "signal output" Nkj$6(N=zJ  
KO8{eT9d  
;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 MF'Z?M  
   step = 20, color = red, width = 3,"residual pump" 7O*Sg2B  
'J} ?'{.  
! set_L(L_f) {restore the original fiber length } +ho=0>  
2c[HA  
)-5eIy  
; ------------- _J,rql@nG<  
diagram 4:                                  ！输出图表4 ?:`sE"  
q7KHx b  
"TransverseProfiles" 2_u+&7  
,yNuz@^ P  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) CtN\-E-  
PRiE2Di2S  
x: 0, 1.4 * r_co /um q>'#;QA  
"radialposition (µm)", @x ej_u):G*  
y: 0, 1.2 * I_max *cm^2 sjLMM_'  
"intensity (W/ cm&sup2;)", @y +|dLR*s  
y2: 0, 1.3 * N_Tm \jk*Nm8;  
frame ui)mYR[8X  
hx s) s9Z,HY  
hy J#Y0R"fo  
#A4WFZ  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 f9#srIx+  
  yscale = 2, &1T)'Bn  
  color = gray, Ewkx4,`Ff  
  width = 3, {,Vvm*L/  
  maxconnect = 1, "ADI.  
  "N_dop (right scale)" '6NrL;  
u `xQC/  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 6c^?DLy9B  
  color = red, Q]=/e7  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 7WSP0Xyz  
  width = 3, p+?`ru  
  "pump" x[TLlV:{  
3s%DF,  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 9teP4H}m  
  color = blue, |X1axRO  
  maxconnect = 1, >%`SXB&9  
  width = 3, RYvdfj.ij  
  "signal" .zdaY, U  
2 ^"j]g>mj  
X(E`cH |  
; ------------- L;*7p9  
diagram 5:                                  ！输出图表5 w+')wyB  
rlh:|#GTJ  
"TransitionCross-sections" Xa>'DO2  
HFjSM~  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) T$0)un  
-`Z!p  
x: 1450, 2050 I@VzH(da\  
"wavelength(nm)", @x zx8@4?bK  
y: 0, 0.6 NGi)Lh|  
"cross-sections(1e-24 m&sup2;)", @y nl(GoX$vRQ  
frame QhRz57'  
hx Ms5qQ<0v_  
hy I:DAn!N-A*  
CzreX3i  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 whw+  
  color = red, 7&P70DO  
  width = 3, y,rdyt  
  "absorption" 1(T2:N(M-A  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 j|[$P4w}U  
  color = blue, R73@!5N%  
  width = 3, -a|b.p  
  "emission" yR{rje*  
tR9iFv_  

感谢，视频上有点看不清楚