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

(* kQLT$8io  
Demo for program"RP Fiber Power": thulium-doped fiber laser, dXl]Pe|v  
pumped at 790 nm. Across-relaxation process allows for efficient TtPr)F|  
population of theupper laser level. q]TqI' o  
*)            ！（*  *）注释语句 cJ. 7Mt  
\ZMP_UU(  
diagram shown: 1,2,3,4,5  ！指定输出图表 -j&
Vtr  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 oE1M/*myS  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 l
l%G!VR  
; 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 &iNS?1a%f=  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 b0 &  
; 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 Yrxk Kw#  
!4t`Hv?'  
include"Units.inc"         ！读取“Units.inc”文件中内容 \]8VwsP  
'd/*BjNp)  
include"Tm-silicate.inc"    ！读取光谱数据 Q ]"jD#F  
]boE{R!I  
; Basic fiberparameters:    ！定义基本光纤参数 n3$gx,KL  
L_f := 4 { fiberlength }      ！光纤长度 \,R!S/R#  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 TGf;_)El  
r_co := 6 um { coreradius }                ！纤芯半径 qBYg[K>  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 mw4JQ\  
*g_w I%l  
; Parameters of thechannels:                ！定义光信道 hsz^rZ  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm :H?f*aw  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 'w.}2(  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W j0x5@1`6G  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um & fu z2xv  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 4&{!M _  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 PO o%^'(  
E]1##6Ae  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm K(VW%hV1  
w_s := 7 um                          ！信号光的半径 HTk\723Rdw  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 IP ,.+:i  
loss_s := 0                            ！信号光寄生损耗为0 b+{r!D}~  
'wvMH;}u  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 Jf_%<\ O  
Nqcp1J"  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 mb1Vu  
calc j (ygQ4T  
  begin CZ(`|;BC*  
    global allow all;                   ！声明全局变量 ` 1+%}}!$u  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 u,o1{%O  
    add_ring(r_co, N_Tm); : @6mFTV  
    def_ionsystem();              ！光谱数据函数 aGK@)&h$  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 -Sz_
mr  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 Wp[9beI*M  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 o=_c2m   
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 !9]d|8!  
    finish_fiber();                                   | -+zofx  
  end; $UvPo0{  
!^WHZv4  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 P!e=b-T  
show "Outputpowers:"                                   ！输出字符串Output powers： wL3,g2-L  
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） <a|@t@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） I[D8""U  
m`}{V5;  
G1d(,4Xp  
; ------------- O/b+CSS1  
diagram 1:                   !输出图表1 $1Z6\G O  
A@$kLex  
"Powers vs.Position"          ！图表名称 rs]I  
Ew$I\j*  
x: 0, L_f                      ！命令x: 定义x坐标范围 -RMi
8{  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 VkZ.6kV  
y: 0, 15                      ！命令y: 定义y坐标范围 {(tHk_q  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 &
 mt)d  
frame          ！frame改变坐标系的设置 )`+YCCa6F  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） |"]PCb)!  
hx             ！平行于x方向网格 >jTp6tu,  
hy              ！平行于y方向网格 E[g*O5  
vH[Pb#f-  
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 jc:s` 4  
  color = red,  ！图形颜色 R_N:#K.M  
  width = 3,   ！width线条宽度 _#C()Ro*P  
  "pump"       ！相应的文本字符串标签 gl7|H&&xV  
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 X2yTlLdY  
  color = blue,     lAi2,bz"  
  width = 3, rHz||jjU  
  "fw signal" _}gtcyx  
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 2+Rv{%  
  color = blue, T .n4TmF  
  style = fdashed,
;\{`Ci\  
  width = 3, '@=PGpRF  
  "bw signal"  P_Hv%g  
6.c^u5;  
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 /+|#^:@  
  yscale = 2,            ！第二个y轴的缩放比例 1G^#q,%X_v  
  color = magenta, M(Zc^P}N  
  width = 3, OW@\./nM  
  style = fdashed, S\#17.=  
  "n2 (%, right scale)" D(]E/k@;~  
,"2TArC'z  
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 J'T=q/  
  yscale = 2, `T&jPA9eY  
  color = red, y 1\'(1  
  width = 3, p/GVTf  
  style = fdashed, 6'-As=iw  
  "n3 (%, right scale)" .uz|/Zy  
DN] v_u+}  
~AB*]Us  
; ------------- p&b5% 4P  
diagram 2:                    ！输出图表2 9KuD(EJS  
tJ0NPI56yP  
"Variation ofthe Pump Power" 2kh"8oQ  
CH#k(sy  
x: 0, 10 0JjUAxNq  
"pump inputpower (W)", @x (eWPis[  
y: 0, 10 $ &UZy|9  
y2: 0, 100 PkuTg";  
frame 60>.ul2  
hx /j2H A^GT  
hy Cb;WZ3HR  
legpos 150, 150 9pKGr@&   
#]Y>KX2HG  
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 K }$&:nao  
  step = 5, e^1uVN  
  color = blue, u9qMqeF  
  width = 3, eD?3"!c!  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 9ooY?J  
  finish set_P_in(pump, P_pump_in) iEyeX0nm  
R:aa+MX(1  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 J @IS\9O  
  yscale = 2, ;3eKqr0  
  step = 5, TI|/u$SJ<Z  
  color = magenta, 9LC&6Q5O&  
  width = 3, T1WWK'  
  "population of level 2 (%, rightscale)", w8Sv*K  
  finish set_P_in(pump, P_pump_in) "2ru7Y"  
V~IIYB7  
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 Fg]?zEa  
  yscale = 2, ^Q<mV*~  
  step = 5, k(VB+k"3  
  color = red, c
Z8.TsI~  
  width = 3, xGk6n4Gg  
  "population of level 3 (%, rightscale)", R\3VB NX.g  
  finish set_P_in(pump, P_pump_in) _f0C Y"  
ENVk{QE!  
_*M42<wcO  
; ------------- CTa#Q,  
diagram 3:                         ！输出图表3 B5%n(,Lx  
!%(h2]MQ  
"Variation ofthe Fiber Length" T4/fdORS  
T=f|,sK +7  
x: 0.1, 5 Ga>uFb}W~  
"fiber length(m)", @x CBYX]  
y: 0, 10 oTjyN\?H  
"opticalpowers (W)", @y 9# 4Y1LS)  
frame <yA}i"-1W  
hx :'L2J  
hy F'}'(t+oAm  
m><w0k?t  
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 WUc#)EEM)  
  step = 20,             O)|P,?  
  color = blue, ~5 N)f UI\  
  width = 3, ,QIF
&  
  "signal output" `A$!]&[~|  
lT&wOm3  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 QS.>0i/7l  
   step = 20, color = red, width = 3,"residual pump" }kHdK vZ  
+yob)%  
! set_L(L_f) {restore the original fiber length } \`<cH#  
WO5O?jo'  
n"PJ,ao  
; ------------- `N//A}9  
diagram 4:                                  ！输出图表4 >Hb^P)3  
o{b=9-V  
"TransverseProfiles" gF=jf2{YX  
UV 4>N  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) gJiK+&8I  
vr^~yEr  
x: 0, 1.4 * r_co /um d,vNem-Z*L  
"radialposition (µm)", @x /^
{BUo  
y: 0, 1.2 * I_max *cm^2 D-Vai#Cd  
"intensity (W/ cm&sup2;)", @y ]r!>{  
y2: 0, 1.3 * N_Tm #o/H~Iv  
frame ,d+fDmm3  
hx qW:)!z3\  
hy % }|cb7l  
nMfFH[I4  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 -4rDbDsr  
  yscale = 2, g[ 0<m#"  
  color = gray, 1% F?B-k  
  width = 3, jCAC `  
  maxconnect = 1, >SN|?|2U/  
  "N_dop (right scale)" 4to% `)]  
Sd/?&  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 H7Uli]e3  
  color = red, ,oxcq?7#4  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 =
(a1+.O  
  width = 3, xqXDxJlns  
  "pump" 5J)=}e  
do-ahl,  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 o@]So(9f  
  color = blue, [XRCLi}  
  maxconnect = 1, [3l*F  
  width = 3, 6$a$K,dZ  
  "signal" _zt19%Wg  
V@7KsB  
+uWDP.  
; ------------- IEjP<pLe  
diagram 5:                                  ！输出图表5 jV#ahNq;  
8zLY6@
  
"TransitionCross-sections"
<H1`  
M<SdPC(+  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Qu5UVjbE,  
Qu=LnGo~P  
x: 1450, 2050 G$'jEa<:u  
"wavelength(nm)", @x SvN9aD1  
y: 0, 0.6 9!9Z~/*m  
"cross-sections(1e-24 m&sup2;)", @y g-`~eG28D5  
frame 2)#K+O3c  
hx pME{jD  
hy e__@GBG  
E_F5(xSA  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 < v]3g  
  color = red, )&era` e[  
  width = 3, P o jmC  
  "absorption" n .!Ym X4  
f: s21_Tm(x * nm) /1e-24,  ！Tm<sup>3+</sup>发射截面与波长的关系 |9"p|6G?B  
  color = blue, 87}&`  
  width = 3, tt%MoQ)  
  "emission" 48|s$K^  
lPLz@Up~  

感谢，视频上有点看不清楚