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

(* InH
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Demo for program"RP Fiber Power": thulium-doped fiber laser, 5w@
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pumped at 790 nm. Across-relaxation process allows for efficient QKwWX_3%Z]  
population of theupper laser level. 
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*)            ！（*  *）注释语句 zb?wlfT  
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diagram shown: 1,2,3,4,5  ！指定输出图表 --Dw  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 S/G,A,"c  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 ?\<2*sW [k  
; 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 KQJn\#>  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 `JG~%0Z?}  
; 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 PJAE
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include"Units.inc"         ！读取“Units.inc”文件中内容 bL)g+<:F  
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include"Tm-silicate.inc"    ！读取光谱数据 ::j'+_9  
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; Basic fiberparameters:    ！定义基本光纤参数 /JEH%)  
L_f := 4 { fiberlength }      ！光纤长度 n{r+t=X  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 79s6U^vv"  
r_co := 6 um { coreradius }                ！纤芯半径 lE?e1mz{  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 dsR{ P,!  
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; Parameters of thechannels:                ！定义光信道 d#ya"e>  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm ?uU0NKZA  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦
YUT"A{L  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W IywovN Tr  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um CBnD)1b\  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 d=oOMXYa   
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 ]1)@.b;QR  
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l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm }h
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w_s := 7 um                          ！信号光的半径 @tEVgyN  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 R>/M>*C  
loss_s := 0                            ！信号光寄生损耗为0 7KRc^ *pZs  
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R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 K[~Wj8W0  
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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 ~-']Q0Z  
calc mH;Z_ME"  
  begin g_0"T}09(  
    global allow all;                   ！声明全局变量 X-:Ni_O\ty  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 $rFv(Qc^=  
    add_ring(r_co, N_Tm); iL|*g3`-f  
    def_ionsystem();              ！光谱数据函数 +FY-r[_~  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 zHb<YpU  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 *9j9=N?  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 &U4]hawbOU  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 <'P|g  
    finish_fiber();                                   GVn
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  end; W.MJyem  
k_P`t[YZV  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 D.*JG7;=Z  
show "Outputpowers:"                                   ！输出字符串Output powers： ;2L=WR%  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） Ic#+*W\ZW  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） _j%Rm:m;<  
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mNb+V/*x3  
; ------------- Sw5H+!  
diagram 1:                   !输出图表1 }[LK/@h  
}Lb];hww1  
"Powers vs.Position"          ！图表名称 !~ -^s  
7MoO2  
x: 0, L_f                      ！命令x: 定义x坐标范围 :6HMb^4  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 et9c<'  
y: 0, 15                      ！命令y: 定义y坐标范围 D|e6$O5o  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 c}QQ8'_  
frame          ！frame改变坐标系的设置 7DOAG
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legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） De>pIN;B>  
hx             ！平行于x方向网格 xZ;';}&pj  
hy              ！平行于y方向网格 yt!K|g  
M\`6H8aLn  
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 zh/+1  
  color = red,  ！图形颜色 HowlJ[km%  
  width = 3,   ！width线条宽度 ^<y$+HcH  
  "pump"       ！相应的文本字符串标签 QRdb~f;<hj  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 dcHkb,HsO  
  color = blue,     l_,8_u7G  
  width = 3, N"E\o,_  
  "fw signal" tmb0zuJ&C!  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 zEO 9TuBO  
  color = blue, c$e~O-OVD?  
  style = fdashed, wV5<sH__  
  width = 3, ,(c="L4[  
  "bw signal" kY_UY~E  
][?GJ"O+U  
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 E+~~d6nB  
  yscale = 2,            ！第二个y轴的缩放比例 E>4 \9  
  color = magenta, xPb`CY7  
  width = 3, ^eZqsd8a  
  style = fdashed, %+pXzw`B  
  "n2 (%, right scale)" VJ=!0v  
IloHU6h'  
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 xUSIck  
  yscale = 2, ZT^PL3j+  
  color = red, Q45rP4mQ  
  width = 3, .Dx]wv  
  style = fdashed, S:1! )7  
  "n3 (%, right scale)" ait/|a  
_')KDy7  
8=2)I.   
; ------------- @l;f'
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diagram 2:                    ！输出图表2 w^ DAu1  
")sq?1?X  
"Variation ofthe Pump Power" SnXYq7`t  
@NyCMe;]  
x: 0, 10 nZ%<2  
"pump inputpower (W)", @x Q7DkhKT  
y: 0, 10 Q0 ^?jh  
y2: 0, 100 YEZ"BgUnbp  
frame 0&mz'xra  
hx !MGQ+bD6  
hy "arbUX~d  
legpos 150, 150
W0nRUAo[  
9JUlu  
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 wiFckF/  
  step = 5, L^0jyp  
  color = blue, }2h~o~  
  width = 3, ZAiQofQ:2  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 Z#Zk)  
  finish set_P_in(pump, P_pump_in) ml3]CcKn  
9^aMmN&6N2  
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 z{%G  
  yscale = 2, Y)!5Z.K  
  step = 5, 2smLv1w@  
  color = magenta, goxgJOiB  
  width = 3, M&>Z[o  
  "population of level 2 (%, rightscale)", y\@XW*_?  
  finish set_P_in(pump, P_pump_in) "1l d4/  
g!K(xhEO  
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 K}wUM^  
  yscale = 2, a"ht\v}1  
  step = 5, 2} T"|56
 
  color = red, M<)HJ lr  
  width = 3, *.i`hfRc  
  "population of level 3 (%, rightscale)", :Tjo+vw7$H  
  finish set_P_in(pump, P_pump_in) YxsWY
7J  
,Z52dg
gD  
|#MA?oz3T  
; ------------- ^c-1wV`/  
diagram 3:                         ！输出图表3 Y=Bk;%yT=  
X#pE!mT  
"Variation ofthe Fiber Length" M~wJe@bc  
yuhSP{pv'  
x: 0.1, 5 Z$+0gm\Cnw  
"fiber length(m)", @x J.*dA j  
y: 0, 10 m+V'*[O{  
"opticalpowers (W)", @y 0P!6 .-XU  
frame ;up89a
-,9  
hx 4wK!)Pwq  
hy e&wWlB![  
N.3M~0M*  
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 \E0Uj>9+[  
  step = 20,             EY&hWl*a^  
  color = blue, )TV'eq  
  width = 3, d7l0;yR&+  
  "signal output" Qs*g)Yr  
IF@)L>-%  
;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 !v94FkS>  
   step = 20, color = red, width = 3,"residual pump" Q;`#ujxL  
4GaF:/  
! set_L(L_f) {restore the original fiber length } +e4o~p  
ZG<<6y*.  
)Ibp%'H  
; ------------- NbfV6$jo  
diagram 4:                                  ！输出图表4 3;#v$F8R  
,AWN *OS  
"TransverseProfiles" {6A3?q  
d
Rt]9gIsx  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) +MXI;k
_  
#=+d;RdlW  
x: 0, 1.4 * r_co /um ,LU/xI0O  
"radialposition (µm)", @x M2mte#h  
y: 0, 1.2 * I_max *cm^2 ?!8M I,c/  
"intensity (W/ cm&sup2;)", @y %5a>@K]  
y2: 0, 1.3 * N_Tm HPm12&8,  
frame #(
!>  
hx 1_*o(HR  
hy ,%yjEO  
F}.<x5I-;h  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 Xb3z<r   
  yscale = 2, Wu9@Ecb  
  color = gray, }"%tlU!}  
  width = 3, ;#cb%e3  
  maxconnect = 1, OZs^c2 W
 
  "N_dop (right scale)" : xB<Rq  
x.~Z9j  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 -AJe\ J 2  
  color = red, U c$RYPq  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 Hj$JXo[U  
  width = 3, "\)j=MI8u+  
  "pump" {Jwh .bJ  
U,~\}$<I  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 z45ImItH  
  color = blue, +|KnO  
  maxconnect = 1, -6(C^X%  
  width = 3, (n|PLi  
  "signal" ,QdUfM  
O2-9Oo@#,  
v&D^N9hy9  
; ------------- uL\ B[<:  
diagram 5:                                  ！输出图表5 w?Cqe N  
7q^osOj"  
"TransitionCross-sections" :q<8:,rP  
>PGW>W$  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) F/IXqj  
xJ:15eDC  
x: 1450, 2050 ,dLh`t<\  
"wavelength(nm)", @x
K}L-$B*i  
y: 0, 0.6 4%0eX]  
"cross-sections(1e-24 m&sup2;)", @y n&jfJgD&g  
frame Om,+59ua*  
hx odD^xg"L  
hy =rMT1  
a4Qr\"Qm  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 Lo5itW  
  color = red, '%vb&a!.6  
  width = 3, Az8>^|@  
  "absorption" vT#zc)j  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 !ZJ"lm  
  color = blue, }K!}6?17T  
  width = 3, %O#)=M~  
  "emission" ]Nz~4ebB  
M,7A|?O
 

感谢，视频上有点看不清楚