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

(* 24jf`1XFW  
Demo for program"RP Fiber Power": thulium-doped fiber laser, U]3!"+Y1P  
pumped at 790 nm. Across-relaxation process allows for efficient 9-42A7g^C  
population of theupper laser level. ,;g%/6X  
*)            ！（*  *）注释语句 T
2e-RR  
(T%F^s5D  
diagram shown: 1,2,3,4,5  ！指定输出图表 KL&/Yt  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 /Y0~BQC7!  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 0?7yM:!l  
; 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 6 4_}"fU  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 Fw<"]*iu  
; 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 ZJ/528Ju  
uavATnGO{B  
include"Units.inc"         ！读取“Units.inc”文件中内容 WPNB!"E98  
B7%,D}  
include"Tm-silicate.inc"    ！读取光谱数据 >tM4|w|  
"DW~E\Y  
; Basic fiberparameters:    ！定义基本光纤参数 ea
3w  
L_f := 4 { fiberlength }      ！光纤长度 W:r[o%B  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 LqWiw24#  
r_co := 6 um { coreradius }                ！纤芯半径 hG1$YE  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 WyO*8b_ D  
v vErzUxN  
; Parameters of thechannels:                ！定义光信道 CD`a-]6qA  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm xs"i_se  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 t!?`2Z5  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ^#_gk uyd!  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Px_8lB/;  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 Ng#psN  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0
IK -vcG  
Ic/hVKYG5  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm Cd%5XD^  
w_s := 7 um                          ！信号光的半径 F
-;JN  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 ?@"@9na  
loss_s := 0                            ！信号光寄生损耗为0 i2qN 0?n  
w~]2c{\Qz  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 .e
JKIck  
/$; Z ~^P  
; 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 Z518J46o  
calc QV[&2&&^<<  
  begin :w^:Z$-hf  
    global allow all;                   ！声明全局变量 ]j&m\'-s  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 ^%\a,~  
    add_ring(r_co, N_Tm); aCU[9Xr?  
    def_ionsystem();              ！光谱数据函数 >k @t.PeoV  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 Il=6t
  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 fk}Raej g  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 k=)U  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 `gl?y;xC  
    finish_fiber();                                   |r@;ulO  
  end; x.1=QF{!  
f}c;s  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 /E6)>y66  
show "Outputpowers:"                                   ！输出字符串Output powers： 11PL1zzH  
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） 1RkN^FZOxq  
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） %`~4rf"7  
u$w.'lK  
whI4@#  
; ------------- -l=C7e  
diagram 1:                   !输出图表1 U`*we43  
ihkZs3}  
"Powers vs.Position"          ！图表名称 L`t786 (M  
SrA6}kS  
x: 0, L_f                      ！命令x: 定义x坐标范围 IsE&k2 SD  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 tN{0C/B9  
y: 0, 15                      ！命令y: 定义y坐标范围 O!Ue0\1Kj0  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 q~qz^E\T  
frame          ！frame改变坐标系的设置 (s'xO~p  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） t_/qd9Jv  
hx             ！平行于x方向网格 S%RxYJ(  
hy              ！平行于y方向网格 +9HU&gQ3  
9No6\{[M  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 c:${qY:!  
  color = red,  ！图形颜色 (0`rfYv5.R  
  width = 3,   ！width线条宽度 thPAD+u.3  
  "pump"       ！相应的文本字符串标签 ^ iu)vED  
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 |mhKD#:  
  color = blue,     {:cGt2*~^  
  width = 3, ceg\lE:8  
  "fw signal" ~Dg:siw  
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 eHx {[J?  
  color = blue,
)+FnwW  
  style = fdashed, py$Gy-I~[  
  width = 3, DvWBvs,  
  "bw signal" @!$xSH  
o=VZ7]  
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 wgSFL6Ei  
  yscale = 2,            ！第二个y轴的缩放比例 k1[`2k:Hk  
  color = magenta, H~[q<ybxr  
  width = 3, qRT5|\l  
  style = fdashed, (fc_V[(m"  
  "n2 (%, right scale)" ""`z3-  
8Ogg(uS70'  
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 Ds=d~sNu  
  yscale = 2, # wn>S<  
  color = red, DI{Qs[  
  width = 3, V^(W)\  
  style = fdashed, ^cdbM
 
  "n3 (%, right scale)" O-AC$C[d  
3meZ]u  
 ^Oj^7.T+  
; ------------- H( LK}[  
diagram 2:                    ！输出图表2 aV fsF|,  
} %3;j5 ;6  
"Variation ofthe Pump Power" BDp(&=ktq  
NX8w(~r,:  
x: 0, 10 !rx5i  
"pump inputpower (W)", @x __z/X"H  
y: 0, 10 TGpdl`k\T  
y2: 0, 100 o &b\bK%E  
frame 0>,i] |Y  
hx iR4"I7J  
hy ][f0ZMa  
legpos 150, 150 }m!T~XR</  
BT:b&"AR[  
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 x!4<ff.  
  step = 5, ^(*eoe  
  color = blue, ~LH).\V  
  width = 3, m=`V  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 %*L8W*V  
  finish set_P_in(pump, P_pump_in)
$9@Z\0   
p,4S?cr>a  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 0s4]eEXH  
  yscale = 2, +5ql
`C  
  step = 5, <95*z @  
  color = magenta, y_IF{%i  
  width = 3, i;2V  
  "population of level 2 (%, rightscale)", 4YMUkwh  
  finish set_P_in(pump, P_pump_in) ud(w0eX  
Lz-(1~o  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 pfk)_;>,  
  yscale = 2, -P]onD  
  step = 5, 5N>L|J2  
  color = red, kKQD$g
.z6  
  width = 3, `?N|{kb  
  "population of level 3 (%, rightscale)", P+p:Ed8
0  
  finish set_P_in(pump, P_pump_in) N[=R$1\Z  
X)Rh&ui  
cMUmJ

H  
; ------------- f<DqA/$  
diagram 3:                         ！输出图表3 Yu%ZwTvw  

w="  
"Variation ofthe Fiber Length" ^O5PcV3Eg  
*=QWx[K|  
x: 0.1, 5 ~:A=o?V2  
"fiber length(m)", @x X{5(i3?S  
y: 0, 10 F-?s8RD  
"opticalpowers (W)", @y CJLfpvV  
frame _'r&'s;<z  
hx Daf;; w  
hy CwzDkr&QC_  
J16(d+  
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 r^"pLzAx  
  step = 20,             p\|*ff0  
  color = blue, &C E){jC  
  width = 3, bq}o#d5p-_  
  "signal output" tw]Q5:6  
fH
5/  
;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 \R#OJ=F  
   step = 20, color = red, width = 3,"residual pump" P_c9v/  
<yEd'Z  
! set_L(L_f) {restore the original fiber length } lGN{1djT  
SxRa
?5  
)mXu{uowr  
; ------------- .GDNd6[K7  
diagram 4:                                  ！输出图表4 %,5_]bGvb  
Rp""&0  
"TransverseProfiles" ]$WwPDZ  
v+`gQXJ"G  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 7pz #%Hf  
m:{IVvN
_  
x: 0, 1.4 * r_co /um [,ns/*f3R  
"radialposition (µm)", @x $>PV6  
y: 0, 1.2 * I_max *cm^2 PeB7Q=d)K1  
"intensity (W/ cm&sup2;)", @y ~Wj. 4b*  
y2: 0, 1.3 * N_Tm xrl!$xE GX  
frame V> @+&q  
hx eB*0})  
hy w+3-j  
<@2g.+9  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 r(cd?sL96R  
  yscale = 2, iwnFCZVS  
  color = gray, .~dNzonq  
  width = 3, 7^Q4?(A  
  maxconnect = 1, ":N EI  
  "N_dop (right scale)" z7g=L@   
?Q%X,!~\:  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 5QUL-*t  
  color = red, %oE3q>S$en  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 Mu]1e5^]  
  width = 3, +>S\.h s4  
  "pump" 5ki<1{aVtZ  
K.K=\ Y2  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 aqzIMOAf  
  color = blue, u3ns-e  
  maxconnect = 1, a
oVfvz2Y  
  width = 3, E;AOCbV*$  
  "signal" yJAz#~PO/  
z8\z`#g!  
I7q}<"`
 
; ------------- =;?afUj  
diagram 5:                                  ！输出图表5 *Z,?VEO  
+Q+>{HK  
"TransitionCross-sections" wz=c#}0dB  
~*Kk+w9H<  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ii:E>O(0B  
`suEN@
^  
x: 1450, 2050 [=q&5'FY0  
"wavelength(nm)", @x CDU$Gi  
y: 0, 0.6 I8:A]  
"cross-sections(1e-24 m&sup2;)", @y _)?59  
frame ,4tuWO)"  
hx eQqx0+-0c  
hy oF0BBs$  
V*1hoC#  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 "MNI_C#{  
  color = red, nkn4VA?"  
  width = 3, ~SN *  
  "absorption" oi:!YVc  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 \=NS@_t,  
  color = blue, 5b5Hc Inu
 
  width = 3, `}Z`aK  
  "emission" \&Zp/;n  
Tt
KV5  

感谢，视频上有点看不清楚