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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

(* {K4+6p  
Demo for program"RP Fiber Power": thulium-doped fiber laser, R+nMy=I%8  
pumped at 790 nm. Across-relaxation process allows for efficient p8kr/uMP ;  
population of theupper laser level. 5DXR8mLoaJ  
*)            !(*  *)注释语句 d"5oD@JG:  
pM{nh00[  
diagram shown: 1,2,3,4,5  !指定输出图表 !).}u,*'no  
; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 4Ue_Y 'LmM  
; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 $we]91(: :  
; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 6`0mta Q  
; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 _* IPk  
; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 s:2|c]wQ#R  
3m>+-})d  
include"Units.inc"         !读取“Units.inc”文件中内容 .s<*'B7&  
Yly@ww9t|  
include"Tm-silicate.inc"    !读取光谱数据 S#-wl2z  
JOb*-q|y  
; Basic fiberparameters:    !定义基本光纤参数 Rx*BwZ  
L_f := 4 { fiberlength }      !光纤长度 _(d.!qGz  
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 t~e<z81p  
r_co := 6 um { coreradius }                !纤芯半径 ,bM-I2BR  
N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 ' zEI;v  
`} m Q  
; Parameters of thechannels:                !定义光信道 SG?Nsp^%`B  
l_p := 790 nm {pump wavelength }                !泵浦光波长790nm )mJf|W!Z#  
dir_p := forward {pump direction (forward or backward) }   !前向泵浦 "+z?x~rk  
P_pump_in := 5 {input pump power }                    !输入泵浦功率5W A%Xt|=^_  
w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um zF@o2<cD@  
I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 mCs#.%dU  
loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 op"$E1+  
DbZ0e5  
l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm zVi15P$  
w_s := 7 um                          !信号光的半径 8>7RxSF  
I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 mAeuw7Ni  
loss_s := 0                            !信号光寄生损耗为0 X*g(q0N<S  
Q|,B*b  
R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 ^pS+/ZSi^  
Wxk x,q?  
; 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 T/c<23i  
calc |+:h|UIUQ  
  begin 3;7q`  
    global allow all;                   !声明全局变量 d'*]ns  
    set_fiber(L_f, No_z_steps, '');        !光纤参数 g|Y] wd  
    add_ring(r_co, N_Tm); ?!=iu!J  
    def_ionsystem();              !光谱数据函数 hKNY+S})g  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 rZojY}dWJ  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 xq %{}  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 `gpQW~*R-;  
    set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 tp:\j@dB  
    finish_fiber();                                   =H %-.m'f2  
  end; 6CC&Z>  
MlJVeod  
; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 <]Wlx`=/D  
show "Outputpowers:"                                   !输出字符串Output powers: *9 Q^5;y  
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) `p0ypi3hn  
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) a`E*\O'd  
U{~SXk'2+  
J9%@VZut  
; ------------- 1/ZR*f a  
diagram 1:                   !输出图表1 {%.Lk'#9  
K'1~^)*  
"Powers vs.Position"          !图表名称 QM5 .f+/  
aV`&L,Q)7E  
x: 0, L_f                      !命令x: 定义x坐标范围 pO~c<d}b  
"position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 #hL*r bpT  
y: 0, 15                      !命令y: 定义y坐标范围 r]P,9  
y2: 0, 100                    !命令y2: 定义第二个y坐标范围 =q(GHg;'  
frame          !frame改变坐标系的设置 g,]@4|  
legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) _M,lQ~  
hx             !平行于x方向网格 ?0<w  
hy              !平行于y方向网格 tZ2K$!/B  
u/Fj'*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 [9mL $;M W  
  color = red,  !图形颜色 `C_'|d<HA  
  width = 3,   !width线条宽度 ]lS@}W\  
  "pump"       !相应的文本字符串标签 Y\+KoR' ;  
f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 :XV} c(+d  
  color = blue,     ( 0Naf  
  width = 3, +VU4s$w6  
  "fw signal" K(T\9J.  
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 ;\y ;  
  color = blue, ~S; Z\  
  style = fdashed, *~z#.63oZ  
  width = 3, #\4 b:dv  
  "bw signal" "DSPPE&[c  
wk\L*\@Y}  
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 XidxNPz0^  
  yscale = 2,            !第二个y轴的缩放比例 o%y;(|4t >  
  color = magenta, ~ eN8|SR  
  width = 3, \&}G]  
  style = fdashed, :a3LS|W  
  "n2 (%, right scale)" $_j1kx$  
S<6k0b(,_3  
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 UQd6/mD`e  
  yscale = 2, H5nS%D  
  color = red, vz`@x45K  
  width = 3, *]s&8/Gmb  
  style = fdashed, Mth6-^g5  
  "n3 (%, right scale)" )u@c3?$6  
. p^xS6e{  
(U87}}/l  
; ------------- SFjU0*B$  
diagram 2:                    !输出图表2 Ie'P#e'  
;?IT)sNY  
"Variation ofthe Pump Power" /N^~U&7  
Ff"gadRXd  
x: 0, 10 #iis/6"  
"pump inputpower (W)", @x eZF'Ck y  
y: 0, 10 oEzDMImJ5  
y2: 0, 100 's@MQ! *  
frame B} *V%}:)  
hx h8^i\j  
hy `?o=*OS7Y  
legpos 150, 150 ZL%VOxYqi  
ValS8V*N1  
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 bY#;E;'7  
  step = 5, RfbdBsL  
  color = blue, DBbc|I/[l  
  width = 3, ?ow'^X-  
  "signal output power (W, leftscale)",     !相应的文本字符串标签 <jd/t19DB  
  finish set_P_in(pump, P_pump_in) rFXSO=P?Z  
sp8[cO=  
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 {HZS:AV0  
  yscale = 2, eihZp  
  step = 5, P"4Mm, C  
  color = magenta, %{ ~>n"  
  width = 3,  *q"G }  
  "population of level 2 (%, rightscale)", ` *9EKj  
  finish set_P_in(pump, P_pump_in) Oje|bxQ  
#)i&DJ^Y  
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 )|T`17-  
  yscale = 2, 1=TSJ2{ 9  
  step = 5, Hptq,~_t  
  color = red, :Kay$r0+  
  width = 3, Z>{*ISvpq  
  "population of level 3 (%, rightscale)", !d4HN.a7+u  
  finish set_P_in(pump, P_pump_in) |(%AM*n  
ku3D?D:V  
oYq,u@oM  
; ------------- ^_w*XV  
diagram 3:                         !输出图表3 ]N\6h(**wy  
4 ?2g&B\  
"Variation ofthe Fiber Length" 7x+=7,BZd  
&|,s{?z2  
x: 0.1, 5 OPJgIU%  
"fiber length(m)", @x F^TAd  
y: 0, 10 T5{T[YdX<  
"opticalpowers (W)", @y CveWl$T12  
frame 2E$i_jc  
hx )_pt*xo  
hy =dn1}  
| M _%QM.  
f: (set_L(x);P_out(signal_fw)),     !改变光纤长度对信号光输出功率的影响 zg0%>iqO  
  step = 20,             77_g}N  
  color = blue, T+BIy|O  
  width = 3, )v-Cj_W5]"  
  "signal output" j/`Up  
[#zE. TW  
;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 [,\i[[<  
   step = 20, color = red, width = 3,"residual pump" 5\+EHW!o  
bQ=s8'  
! set_L(L_f) {restore the original fiber length } ~"5C${~{  
;:^ Lv  
^OjvL6 A/p  
; ------------- .='3bQ(UZ4  
diagram 4:                                  !输出图表4 >~>{;Wq(p+  
7n<#y;wo  
"TransverseProfiles" As p8qHS  
E.4n}s  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) IKtiR8  
${CYDD"mdy  
x: 0, 1.4 * r_co /um ){jqfkL  
"radialposition (µm)", @x B{N=0 cSi  
y: 0, 1.2 * I_max *cm^2 wC(XRqlE  
"intensity (W/ cm&sup2;)", @y SDJ;*s-  
y2: 0, 1.3 * N_Tm T!&jFy*W  
frame /W?z0tk`  
hx (,d/JnP  
hy O '@m4@L   
hQP6@KIe)  
f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 {4o\S  
  yscale = 2, B>ge, }{  
  color = gray, <?nB,U  
  width = 3, \kfcv  
  maxconnect = 1, rSzQUn<  
  "N_dop (right scale)" CF,8f$:2  
p9k4w% ~:  
f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 65;|cmjv  
  color = red, d"LoK,p#  
  maxconnect = 1,           !限制图形区域高度,修正为100%的高度 n=;';(wR[  
  width = 3, Ny]'RS-  
  "pump" 5>N6VeM  
0I(uddG3  
f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 3"f)*w7d  
  color = blue, rL.<Z@ -  
  maxconnect = 1, p6B .s_G4  
  width = 3, 3j]UEA^  
  "signal" :,urb*  
&S9f#Ui  
$^!a`Xr  
; ------------- #>MO]  
diagram 5:                                  !输出图表5 =I+l=;05Rd  
l7!U),x%/U  
"TransitionCross-sections" ',L{CQA?c  
:5$xh  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) MT;SRAmUr  
z"G`o"4 V  
x: 1450, 2050 lNq:JVJ#\r  
"wavelength(nm)", @x i#CaKS  
y: 0, 0.6 \.K\YAM<  
"cross-sections(1e-24 m&sup2;)", @y iMP*]K-O  
frame L$oia)%t-  
hx ~uP r]#  
hy D{Hh#x8Y  
?ZSXoy-kr  
f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 Eqz4{\   
  color = red, P-/XYZ]`  
  width = 3, ckH$E%j   
  "absorption" +Q@/F~1@6@  
f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 Z/XM `Cy  
  color = blue, |@T5$Xg]5  
  width = 3, [[";1l  
  "emission" GI0x>Z+  
^8o_Iz)r,  
lileisgsz 2021-09-28 09:47
感谢,视频上有点看不清楚
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