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

(* >*|Eyv_  
Demo for program"RP Fiber Power": thulium-doped fiber laser, }\A0g}  
pumped at 790 nm. Across-relaxation process allows for efficient e-xT.RnQ  
population of theupper laser level. b+dmJ]c  
*)            ！（*  *）注释语句 xkkG#n)  
Y'}c$*OkI  
diagram shown: 1,2,3,4,5  ！指定输出图表 gxVJH'[V5  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 dJb7d`  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 ,oEAWNbgQ  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 'I[xZu/8yg  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 ~X;sa,)L1+  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 S4E@wLi  
pUgas?e&  
include"Units.inc"         ！读取“Units.inc”文件中内容 0'zjPE#  
J|z' <W  
include"Tm-silicate.inc"    ！读取光谱数据 6Tq2WZ}<'  
5mZ9rLn  
; Basic fiberparameters:    ！定义基本光纤参数 ILHn~d IC  
L_f := 4 { fiberlength }      ！光纤长度 l`:-B'WM  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 G+3uY25y  
r_co := 6 um { coreradius }                ！纤芯半径 E*v+@rv  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 /pGx!  
V%^d~^m,H  
; Parameters of thechannels:                ！定义光信道 h}+Gz={Q^  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm @3I?T Q1  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 Ax4;[K\Q  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W "nNT9 K|  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um S! .N3ezn  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 E_xk8X~  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 fKs3H?|  
G<~P||Lu^  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm 2T"[$iH!7  
w_s := 7 um                          ！信号光的半径 /DSy/p0%  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 7l'1  
loss_s := 0                            ！信号光寄生损耗为0 kPnuU!  
7P52r  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 6U]"i
 
u/`x@u  
; 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 L\t!)X-4  
calc 52*KRq o  
  begin =mxj2>,&  
    global allow all;                   ！声明全局变量 oIKuo~  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 h*mKS -TC  
    add_ring(r_co, N_Tm); z)*\njYe  
    def_ionsystem();              ！光谱数据函数 O(T6Y80pU  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 uF T5Z  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ksqb& ux6  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 !j0iLYo(*  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 %S%0/  
    finish_fiber();                                   y$?O0S%F  
  end; fydQaxCND  
mZ#IP  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 J]&nZud`  
show "Outputpowers:"                                   ！输出字符串Output powers： 4 ..V  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） \&s$?r  
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） S`[r]msw  
\j vS`+  
wq#'o9s,  
; ------------- ;BEX|wxn  
diagram 1:                   !输出图表1 \H/}|^+@  
PW
-sF  
"Powers vs.Position"          ！图表名称 I#CS;Yh95  
z`|E0~{-  
x: 0, L_f                      ！命令x: 定义x坐标范围 ??Dv\yLZI  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 m^a0JR}u9  
y: 0, 15                      ！命令y: 定义y坐标范围 YZ5[#E@l  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 AyMbwCR"X  
frame          ！frame改变坐标系的设置 |Lz7}g=6  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 4"V6k4i5  
hx             ！平行于x方向网格 C2K<CDVw  
hy              ！平行于y方向网格 $K!6T  
+|spC  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 l,E4h-$  
  color = red,  ！图形颜色 Dl=vv9
 
  width = 3,   ！width线条宽度 G#z9=NF~V  
  "pump"       ！相应的文本字符串标签 A@I3:V  
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 G4,BcCPQ  
  color = blue,     ]iiB|xT  
  width = 3, i&,1  
  "fw signal" DOWZhD  
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 g);.".@"  
  color = blue, 7, :l\t  
  style = fdashed, t?_{  
  width = 3, 5ZHO+@HiFH  
  "bw signal" @XX7ydG5  
a(+u"Kr 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 ?}U l(  
  yscale = 2,            ！第二个y轴的缩放比例 2v1dSdX,W  
  color = magenta, Z-z(SKL  
  width = 3, ( z%t  
  style = fdashed, N'0fB`:kz  
  "n2 (%, right scale)" [[8h*[:  
LwEc*79  
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 _zFJ]7Ym.)  
  yscale = 2, ut9R]01:  
  color = red, qyYf&VC}  
  width = 3, 1s#GY<<  
  style = fdashed, ]hA]o7k  
  "n3 (%, right scale)" uBBW2  
W:=CpbwENX  
K|{&SU_m  
; ------------- e\i}@]  
diagram 2:                    ！输出图表2 ZZF\;  
#'h(o/hz&&  
"Variation ofthe Pump Power" *
XqS~G  
fn\&%`U  
x: 0, 10 cjBHczkY  
"pump inputpower (W)", @x 15`
,kJSK  
y: 0, 10 +8
V|  
y2: 0, 100 kZvh<NFh_  
frame 3O'X;s2\d  
hx eqWb>$  
hy 08E,U  
legpos 150, 150 5[>N[}Ck>  
1"HSM=p  
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 wi-{&  
  step = 5, =J&aN1Hgt  
  color = blue, vpqMKyy  
  width = 3, -`e`U%n  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 9IG3zMf  
  finish set_P_in(pump, P_pump_in) >{kPa|  
s2\6\8Ipn  
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 O(f&0h
!  
  yscale = 2, 9w,u4q  
  step = 5, rlVo}kc7:  
  color = magenta, o[CjRQY]P  
  width = 3, 'QEQyJ0EB  
  "population of level 2 (%, rightscale)", vE+OL8V  
  finish set_P_in(pump, P_pump_in) 9]TvLh3  
'l3K*lck  
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 (L6*#!Dt  
  yscale = 2, 5mYI5~ p  
  step = 5, ) "Toh=x]  
  color = red, QG=&{-I~[3  
  width = 3, HxH=~B1"P  
  "population of level 3 (%, rightscale)", ;Cqjg.wkB  
  finish set_P_in(pump, P_pump_in) vxC,8Z  
wC[Bh^]  
1f`=U0  
; ------------- jo8;S?+<|?  
diagram 3:                         ！输出图表3 Z ]WA-Q6n  
E8.xmTq  
"Variation ofthe Fiber Length" }D&fw=r"M  
IKV:J
9  
x: 0.1, 5 VpMPTEZ*L  
"fiber length(m)", @x j;b<oQH  
y: 0, 10 Ev;ocb,  
"opticalpowers (W)", @y ZM%z"hO9R  
frame R]{AJ"p  
hx qP0_#l&  
hy
f@a@R$y  
5U/1Z{  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 b
,#E.%SLw  
  step = 20,             Qvd$fY**  
  color = blue, Z"fnjH
 
  width = 3, p@7[w@B\c  
  "signal output" mjq
VP.  
b(~ gQM  
;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
1$Pn;jg:  
   step = 20, color = red, width = 3,"residual pump" D%Y{(l+X  
jHx<}<  
! set_L(L_f) {restore the original fiber length } W}5H'D  

qm)KO 4  
,\K1cW~U5  
; ------------- IlcFW  
diagram 4:                                  ！输出图表4 b]h]h1~hHH  
L){rv)?="  
"TransverseProfiles" lAwOp  
uvrfR?%QK  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) AT{ewb  
 ,JcQp=g  
x: 0, 1.4 * r_co /um '?~k`zK  
"radialposition (µm)", @x &n:F])`2  
y: 0, 1.2 * I_max *cm^2 7^J-5lY3S  
"intensity (W/ cm&sup2;)", @y zAxwM-`  
y2: 0, 1.3 * N_Tm !Fz9\|  
frame t'EH_U  
hx E5M*Gs  
hy /N ^%=G#  
f#p.=F$  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 B94mh  
  yscale = 2, u= K
?K  
  color = gray, P~0d'Oi  
  width = 3, khb Gyg%  
  maxconnect = 1, *s6MF{Ds  
  "N_dop (right scale)" 96Tc:#9i  
<oSk!6*  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 "l&sDh%Lk<  
  color = red, '* +]&~b  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 U jC$Mi`O  
  width = 3, .O'gD.|^N  
  "pump" kl|KFdA;  
iw(\]tMt  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 d+|8({X]D8  
  color = blue, -NVk>ENL4  
  maxconnect = 1, 5|-(Ic  
  width = 3, )^^r\  
  "signal" L$`!~z1  
~}mX#,  
VPf*>ph=  
; ------------- ~`MGXd"o  
diagram 5:                                  ！输出图表5 u+zq:2)H6  
xnu|?;.}!  
"TransitionCross-sections" Ox&g#,@h  
s&lZxnIjc  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) XQk9 U  
'MM#nQ\(  
x: 1450, 2050 d `Q$URn|  
"wavelength(nm)", @x /s=TLPm  
y: 0, 0.6 'W$jHs  
"cross-sections(1e-24 m&sup2;)", @y WW;S  
frame R$*{@U  
hx f
h \<tnY  
hy 2&]UFg:8Q  
&K`[SX=  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 [6
!/  
  color = red, 5RT
AM  
  width = 3, o"v> BhpC  
  "absorption" D|Z,eench  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 ha'oLm#  
  color = blue, ~]A';xH&  
  width = 3, 7BF't!-2F  
  "emission" ;'pEzz?k"  
C did*hxJ  

感谢，视频上有点看不清楚