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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

(* l`M5'r]l  
Demo for program"RP Fiber Power": thulium-doped fiber laser, #EQx  
pumped at 790 nm. Across-relaxation process allows for efficient UU;-q_H6  
population of theupper laser level. iQm.]A  
*)            ！（*  *）注释语句 =N@)CB7a  
Vr/` \441  
diagram shown: 1,2,3,4,5  ！指定输出图表 sx-Hw4.a"  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 A}#]g>L  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 )S wG+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 J^g,jBk  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 z7@(uIl=X  
; 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 kuTq8p2E  
vU8FHVytV  
include"Units.inc"         ！读取“Units.inc”文件中内容 6L:tr LuQ  
7{K i;1B[w  
include"Tm-silicate.inc"    ！读取光谱数据 V$-~%7@>;9  
].k+Nzf_  
; Basic fiberparameters:    ！定义基本光纤参数 /XW&q)z-Hl  
L_f := 4 { fiberlength }      ！光纤长度 *b6I%MZn  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 ^ =/?<C4  
r_co := 6 um { coreradius }                ！纤芯半径 {#w A !>.  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 Rekb?|{z  
2<6`TA*m  
; Parameters of thechannels:                ！定义光信道 |Uy e>%*}4  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm t4jd KYA  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 y ;{^Ln4{  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W U=&^H!LVY  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um =$)4:  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 `\W   
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 !sfXq"F  
nL":0!DTRD  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm L= :d!UF  
w_s := 7 um                          ！信号光的半径 [w&#+h-q  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 m{b ZRkt  
loss_s := 0                            ！信号光寄生损耗为0 I+Ncmg )>  
?u_gXz;A  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率  /i-xX*  
bVa+kYE  
; 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 BrlzN='j}  
calc M1/M}~  
  begin L(WL,xnBy  
    global allow all;                   ！声明全局变量 E(QZ!'%K+m  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 @)W(q5)}9"  
    add_ring(r_co, N_Tm); =9qGEkd3  
    def_ionsystem();              ！光谱数据函数 M#\  <  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 yqC Q24  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 c-4m8Kg?L  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Snc; p  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 | ((1V^  
    finish_fiber();                                   '%zN  
  end; ]>R`;"(  
aN^]bs?R  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 *#&k+{a^2  
show "Outputpowers:"                                   ！输出字符串Output powers： H&w:`JYDL3  
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） ID67?:%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=0"f}Jo.  
..t,LU@|  
n S_Ta  
; ------------- _BZ1Vnv  
diagram 1:                   !输出图表1 N$\ bg|v  
!dU9sB2  
"Powers vs.Position"          ！图表名称 h>}ax\h  
 \#4m@  
x: 0, L_f                      ！命令x: 定义x坐标范围 Tub1S v>J  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 V]I:2k5  
y: 0, 15                      ！命令y: 定义y坐标范围 o&(wg(Rv  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 :J^qjAV  
frame          ！frame改变坐标系的设置 L'zE<3O'3  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） &49u5&TiP  
hx             ！平行于x方向网格 3lo;^KX !  
hy              ！平行于y方向网格 yJ!OsD  
)v[XmJ>H~o  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 `I5O4|K)  
  color = red,  ！图形颜色 (GCG/8s  
  width = 3,   ！width线条宽度 2t+D8 d|c<  
  "pump"       ！相应的文本字符串标签 ,i?)  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 \7pipde  
  color = blue,     s}6+8fE"  
  width = 3, T4mv%zzS  
  "fw signal" >^a$  
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 DH 6q7"@  
  color = blue, y|$R`P  
  style = fdashed, rwiw Rh  
  width = 3, RFw(]o,9cR  
  "bw signal" ~12_D'8D[  
MkwU<ae AB  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 qAoAUD m  
  yscale = 2,            ！第二个y轴的缩放比例 PU W[e%  
  color = magenta, {Fbg]'FQ  
  width = 3, geksjVwPH  
  style = fdashed, 93j{.0]X  
  "n2 (%, right scale)" 8{dEpV*  
6?N4l ]l  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 v? L  
  yscale = 2, KU-'+k2s;p  
  color = red, lsk_P&M  
  width = 3, iOXZ ]Xj5  
  style = fdashed, 4'',6KJ@  
  "n3 (%, right scale)" e}c&LDgU  
B`fH^N  
o\Uu?.-<  
; ------------- cFK @3a  
diagram 2:                    ！输出图表2 YutQ]zYA.  
H$!+A  
"Variation ofthe Pump Power" CEuWw:)  
.}q]`<]ze  
x: 0, 10 &)n_]R#)  
"pump inputpower (W)", @x 7h%4]  
y: 0, 10 K UKACUL  
y2: 0, 100 )0^ >#k  
frame XVt/qb%)r  
hx O gmSQ  
hy ,MQVE  
legpos 150, 150 4WC9US-k  
r`j Wp\z  
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 !;S"&mcPDJ  
  step = 5, 5Fm av5  
  color = blue, jfD1  
  width = 3, ]dSK wxk  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 "xe=N  
  finish set_P_in(pump, P_pump_in) V|'1tB=;*1  
F30 ]  
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 SHV4!xP-V  
  yscale = 2, 8Hi!kc;f6>  
  step = 5, 7\ypW$Ot  
  color = magenta, *FK`&(B+}  
  width = 3, 87V1#U^  
  "population of level 2 (%, rightscale)", Pao%pA.<  
  finish set_P_in(pump, P_pump_in) +f>cxA  
& ze>X  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 +H_MV=A^  
  yscale = 2, `S3>3  
  step = 5, e4`uVq5  
  color = red, i%-Ld Ka}"  
  width = 3, (gwj)?:  
  "population of level 3 (%, rightscale)", s =Umj'1k  
  finish set_P_in(pump, P_pump_in) #]E(N~  
";x+1R.d  
@%hCAm  
; ------------- JBC$Ku  
diagram 3:                         ！输出图表3 4nqoZk^R  
&H||&Z[pk  
"Variation ofthe Fiber Length" !2tW$BP^  
$g10vF3  
x: 0.1, 5 L?5f+@0.  
"fiber length(m)", @x "Pz}@=  
y: 0, 10 UG;Y^?Ppe5  
"opticalpowers (W)", @y $s\UL}Gc  
frame Nc)J18  
hx 1[;;sSp  
hy ~Rpm-^  
B=Ym x2A9]  
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 80pid[F  
  step = 20,             f )Z%pgB  
  color = blue, nV*y`.+  
  width = 3, O(z}H}Fv  
  "signal output" ?4 S+edX  
j(rL  
;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 ]Mi.f3QlO6  
   step = 20, color = red, width = 3,"residual pump" yxt[= C  
UPiW73Nu  
! set_L(L_f) {restore the original fiber length } ({^9<Us  
Rp9fO?ZjHt  
V\]" }V)"  
; ------------- lrWQOYf2  
diagram 4:                                  ！输出图表4 "LhvzM-<8  
(ljF{)Ml+=  
"TransverseProfiles" $wB^R(f@  
6w[}&pX"z  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) q.#[TI ^  
px;/8c-  
x: 0, 1.4 * r_co /um w Y   
"radialposition (µm)", @x ->^~KVh&  
y: 0, 1.2 * I_max *cm^2 9BEFr/.  
"intensity (W/ cm&sup2;)", @y E Y<8B3y  
y2: 0, 1.3 * N_Tm ~EzaC?fQ  
frame FR[ B v  
hx `d]IX^;  
hy +|iYg/2  
)E#2J$TD  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 :O<bA& :d  
  yscale = 2, l_tw<`Ep  
  color = gray, DQ#H,\ ^<  
  width = 3, YevyN\,}V!  
  maxconnect = 1, ~[WF_NU1y  
  "N_dop (right scale)" <*!i$(gn  
v1JS~uDz  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 |'O[7uT  
  color = red, h%; e0Xz|  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 <h).fX  
  width = 3, "\W-f  
  "pump" )4>2IQ  
h^9"i3H  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 ._w8J"E5  
  color = blue, 9>zcBG8f  
  maxconnect = 1, 7;@ST`cC  
  width = 3, g"s$}5{8:  
  "signal" TGXa,A{  
{GDmVWG0q  
Rlnbdb;!k  
; ------------- `p b5*h6r!  
diagram 5:                                  ！输出图表5 u]NZ`t%AP  
gWABY%!}  
"TransitionCross-sections" `\`>0hlu  
8$s9(n-_Y  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) *-W#G}O0  
@vL20O.  
x: 1450, 2050 7]xm2CHx5  
"wavelength(nm)", @x HoV^Y6  
y: 0, 0.6 vb 1@yQ  
"cross-sections(1e-24 m&sup2;)", @y Z/x*Y#0@n  
frame fDE%R={!n5  
hx KrVcwAcq|1  
hy ih,%i4<}6m  
~R$~&x(b  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 >Rvx[`|O!m  
  color = red, <IW#ME  
  width = 3, fO'Wj`&a  
  "absorption" Zwcy4>8  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 |@,|F:h<M  
  color = blue, j'[m:/  
  width = 3, w -Nhs6  
  "emission" o1&:ry  
CT0l!J~5m~  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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