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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

(* }/ vW"&h-  
Demo for program"RP Fiber Power": thulium-doped fiber laser, \/Mx|7<  
pumped at 790 nm. Across-relaxation process allows for efficient u7[}pf$}  
population of theupper laser level. W~ET/h  
*)            ！（*  *）注释语句 P7.bn  
87 s*lS  
diagram shown: 1,2,3,4,5  ！指定输出图表 {k) gDJU  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 G7nhUg  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 /!?LBtqy  
; 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 'V]&X.=zC  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 O9sEaVX  
; 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 ^'V :T Y  
PVo7Sy!'H  
include"Units.inc"         ！读取“Units.inc”文件中内容 7pyzPc#_  
_?I{>:!|  
include"Tm-silicate.inc"    ！读取光谱数据 HYfGu1j?X  
XnQR(r)pR2  
; Basic fiberparameters:    ！定义基本光纤参数 4a-JC"  
L_f := 4 { fiberlength }      ！光纤长度 r0XEB,}  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 P0n1I7|  
r_co := 6 um { coreradius }                ！纤芯半径 yWi-ic [n  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 }4A] x`3  
|vI`u[P  
; Parameters of thechannels:                ！定义光信道 <e2l@@#oy  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm .5(YL8d  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 <&3P\aM>  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W @Vre)OrN#  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um & o5x  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 *q=T1JY  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 $4nAb^/  
Muo E~K2  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm K~TwyB-h  
w_s := 7 um                          ！信号光的半径 .AfZ5s]/F  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Y![Q1D!  
loss_s := 0                            ！信号光寄生损耗为0 nkW})LyB\  
?=? _32O  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 b@Ej$t&  
q+?<cjVg  
; 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 kxMvOB$  
calc e4S@ J/D  
  begin gP2zDI   
    global allow all;                   ！声明全局变量 V}jGxt0  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 >JpBX+]5m  
    add_ring(r_co, N_Tm); =;Gq:mHi  
    def_ionsystem();              ！光谱数据函数 JrzPDb`m  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 lsz3'!%Y)  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 [G<ga80  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 *~#I5s\s!  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 p='j/=  
    finish_fiber();                                   |Y7SP]/`gB  
  end; YX$(Sc3.6  
/ZvP.VW&  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 6TP /0o)  
show "Outputpowers:"                                   ！输出字符串Output powers： `YNzcn0x  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） 8y LcTA$T  
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） 2bt>t[0ad  
eZ'8JU]  
n7[nl43  
; ------------- +A}t_u3<  
diagram 1:                   !输出图表1 ^^a6 (b  
zp}7p~#k^  
"Powers vs.Position"          ！图表名称 / Hr|u  
r2-iISxg+  
x: 0, L_f                      ！命令x: 定义x坐标范围 y;b#qUd5a  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 \|PiQy*_?  
y: 0, 15                      ！命令y: 定义y坐标范围 .?Eb{W)^br  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 JW>k8QjyN  
frame          ！frame改变坐标系的设置 PmuG(qg  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） "qmSwdM  
hx             ！平行于x方向网格 F2N"aQ&  
hy              ！平行于y方向网格 K#R]of~/  
\e86'&  
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 g}_2T\$k  
  color = red,  ！图形颜色 %' DO FiU  
  width = 3,   ！width线条宽度 zluq2r  
  "pump"       ！相应的文本字符串标签 pDS[ecx  
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 ^/n1h g  
  color = blue,     +XWTu!  
  width = 3, RY;V@\pRY+  
  "fw signal" pwo$qs(p  
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 7KgaXi3r  
  color = blue, #2]*qgA4  
  style = fdashed, 9PB%v.t5 y  
  width = 3, z^9oaoTl  
  "bw signal"  P^te  
}?2X q  
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 @b(@`yz.a  
  yscale = 2,            ！第二个y轴的缩放比例 OY1bFIE  
  color = magenta, kFjv'[Y1N  
  width = 3, DuC#tDP  
  style = fdashed, (wu'FFJp#  
  "n2 (%, right scale)" Bz'.7" ":0  
jf)cDj2  
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 EV6R[2kl  
  yscale = 2, Zj[m  
  color = red, vjX,7NY?  
  width = 3, W3~u J(  
  style = fdashed, `)cI^!  
  "n3 (%, right scale)" >vD}gGBe  
jm%P-C @  
dOv\]  
; ------------- ^p(aZj3k  
diagram 2:                    ！输出图表2 4A+g-{d  
_#\Nw0{  
"Variation ofthe Pump Power" +E. D:  
T;DKDg a  
x: 0, 10  8s22VL  
"pump inputpower (W)", @x {aA6b  
y: 0, 10 qG,h 1  
y2: 0, 100 YC;@^  
frame wfO -bzdw  
hx 0WzoI2Q  
hy c) Eu(j\#  
legpos 150, 150 Foq3==*p  
H, 3Bf  
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 W?SAa7+  
  step = 5, Sm[#L`eqW  
  color = blue, i;pg9Vw  
  width = 3, cAN8'S(s1  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 kKRu]0J~[  
  finish set_P_in(pump, P_pump_in) Q1Qw45$  
+o3n%( ^~  
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 N5l`Rq^K  
  yscale = 2, _S[@?]=`b  
  step = 5, #&uajo  
  color = magenta, 8oU R/___  
  width = 3, Qxy ~ %;X  
  "population of level 2 (%, rightscale)", 5M>p%/  
  finish set_P_in(pump, P_pump_in) 7h(  
8~qpOQX^V  
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 Q(x=;wf5r  
  yscale = 2, ?lqqu#;8  
  step = 5, iuqJPW^}  
  color = red, Ib2&L  
  width = 3, sAO/yG  
  "population of level 3 (%, rightscale)", ph)=:*A6&  
  finish set_P_in(pump, P_pump_in) %iPIgma  
xP9R d/xa|  
}x{1{Bw>Y  
; ------------- AvIheR  
diagram 3:                         ！输出图表3 ve a$G~[%6  
oT:w GBW  
"Variation ofthe Fiber Length" _ZWU~38PM  
kyJKai  
x: 0.1, 5 uFuH/(}K[  
"fiber length(m)", @x `{yD\qDyX  
y: 0, 10 [vBP,_Tjx  
"opticalpowers (W)", @y 1A(f_ 0,.Q  
frame dqU)(T=C  
hx jA@ uV,w  
hy 9l[C&0w#\  
w4^ $@GtN  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 \/wk!mWV@  
  step = 20,             pxbuZ9w2Q  
  color = blue, ,o `tRh<  
  width = 3, Q[!?SSX%  
  "signal output" GAR6nJCz  
e=tM=i"  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 {)Zz4  
   step = 20, color = red, width = 3,"residual pump" /K,@{__JP  
{poTA+i  
! set_L(L_f) {restore the original fiber length } M.$=tuUL  
)>rYp )  
tnX W7ej^  
; ------------- ]'#^ ~.  
diagram 4:                                  ！输出图表4 :W'.SRD  
Q."rE"}<  
"TransverseProfiles" grd fR`3  
^sJp!hi4=)  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) pL.~z  
A~a7/N6s;  
x: 0, 1.4 * r_co /um `Z`o[]%  
"radialposition (µm)", @x &4p~i Z  
y: 0, 1.2 * I_max *cm^2 ZI!;~q  
"intensity (W/ cm&sup2;)", @y H[/^&1P  
y2: 0, 1.3 * N_Tm gi/W3q3c6  
frame lb)i0`AN+  
hx OH5#.${O  
hy J B  !Q  
{*Qx^e`h$.  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 0te[i*G  
  yscale = 2, g+k yvI7o  
  color = gray, A^pRHbRq  
  width = 3, aFy'6c}  
  maxconnect = 1, ];Bk|xJ/>  
  "N_dop (right scale)" V#-8[G6Ra  
e({-. ra  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 KlRIJOS  
  color = red, ,HW[l.v  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 qP[jtRIN  
  width = 3, rge/qUr/^  
  "pump" !2g*=oY  
cfW;gFf  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 NFb<fD[C  
  color = blue, }xy[ &-dh  
  maxconnect = 1, ohB@ijC!  
  width = 3, y)+l U  
  "signal" +@yTcz  
(yhnv Z  
mp>Ne6\Tu  
; ------------- fUS1`  
diagram 5:                                  ！输出图表5 lyyR yFfQ  
agPTY{;  
"TransitionCross-sections" V5HK6-T  
#?RT$L>n  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) _{YUWV50}  
%8g1h)F"S  
x: 1450, 2050 6^"Spf]  
"wavelength(nm)", @x IkJ-*vI6  
y: 0, 0.6 3etW4  
"cross-sections(1e-24 m&sup2;)", @y 8{4jlL;"`?  
frame rE$=~s  
hx J`d;I#R%c  
hy Hn!13+fS  
, LVZ  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 vAjvW&'g  
  color = red, pt=H?{06  
  width = 3, aLt2fB1)  
  "absorption" >K-S&Y  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 cCbZ*  
  color = blue, .h[yw$z6  
  width = 3, eNX!EN(^  
  "emission" /V$U%0  
gis;)al  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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