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

(* ndCS<ojcBP  
Demo for program"RP Fiber Power": thulium-doped fiber laser, }D
UDA%U  
pumped at 790 nm. Across-relaxation process allows for efficient 1=q?#PQ  
population of theupper laser level. 5KH'|z  
*)            ！（*  *）注释语句 mZ5K hPvf8  
+/>YH-P=  
diagram shown: 1,2,3,4,5  ！指定输出图表 MMA@J  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 H+#wj|,+\  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 n8O
dRv  
; 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 b gc<)=  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 ;&^"q{m  
; 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 QV H'06"{  
mQA<t)1  
include"Units.inc"         ！读取“Units.inc”文件中内容 >ya-  
r4NT`&`g?  
include"Tm-silicate.inc"    ！读取光谱数据 3JE;:2O~P  
='bmjXu  
; Basic fiberparameters:    ！定义基本光纤参数 4Ig{#}<  
L_f := 4 { fiberlength }      ！光纤长度 bq6{ty"  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 5WNg+  
r_co := 6 um { coreradius }                ！纤芯半径 ah Xq{>  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ]qza*ba  
6% y)  
; Parameters of thechannels:                ！定义光信道 "0 PN  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm uF3p1by  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 5B.??;xtaV  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ])wMUJWg2  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um ]o+|jgkt]  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 9]F&Fz/G  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 yg[;  
@[b:([  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm OO wA{]gK  
w_s := 7 um                          ！信号光的半径 '=b&)HbeK  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 OI}HvgV^!  
loss_s := 0                            ！信号光寄生损耗为0 :kx#];2i  
P
[P72WR  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 u4+uGYr*@  
Okg8Ve2  
; 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 g+/U^JIc4l  
calc 2V"gqJHv  
  begin .@3u3i64'  
    global allow all;                   ！声明全局变量 FHcqu_;J  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 g~H?l3v  
    add_ring(r_co, N_Tm); u[|S*(P  
    def_ionsystem();              ！光谱数据函数 *4^]?Y\*  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 LLHOWD C(2  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 |ShRxE3@'  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 dVt@D&  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 JiLrwPex[  
    finish_fiber();                                   :=7'1H  
  end; R:R@sU  
)* nbEZm@  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 Qn3
+bF4  
show "Outputpowers:"                                   ！输出字符串Output powers： Jo(}#_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） 'C>SyU  
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） RH4n0=2  
,L:)ZZgN  
+}0*_VW  
; ------------- :(p rx   
diagram 1:                   !输出图表1 r=||sZs  
*Z2Q]?:{ i  
"Powers vs.Position"          ！图表名称 fvM3.P  
molowPI  
x: 0, L_f                      ！命令x: 定义x坐标范围 RF2XJJ  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 /aa;M*Qp  
y: 0, 15                      ！命令y: 定义y坐标范围 L0V

R(  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 v 4b`19}  
frame          ！frame改变坐标系的设置 HPdwx V  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） &8i{'k,l  
hx             ！平行于x方向网格 RS02>$jo  
hy              ！平行于y方向网格 eRy'N|'  
CgKSK0/a  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 J<*Mk  
  color = red,  ！图形颜色 =<h=">}5'  
  width = 3,   ！width线条宽度 9S1V!Jp  
  "pump"       ！相应的文本字符串标签 .mrRv8>$  
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 UnF4RF:A2&  
  color = blue,     xa0%;nFKe  
  width = 3, H 7F~+Q-}  
  "fw signal" 3}1+"? s  
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 FEmlC,%  
  color = blue, ZxPAu%Y  
  style = fdashed, Qu\l$/  
  width = 3, 
j77}{5@p  
  "bw signal" (3r,PS@Qq@  
7Ej#7\TB]  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 F X2
`p_  
  yscale = 2,            ！第二个y轴的缩放比例 Ol[IC  
  color = magenta, XRz6Yf(/  
  width = 3, {o<p{q  
  style = fdashed, -XG$ 0  
  "n2 (%, right scale)" z))[Lg  
OBSJbDqT  
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 bK1`a{  
  yscale = 2, @}!$NI8  
  color = red, 8HA=O?Cg  
  width = 3, h*Tiv^a  
  style = fdashed, !`=?<Fl  
  "n3 (%, right scale)" OSIp  
pdiZ"pe  
PW4Wn`u  
; ------------- ahv=HWX k  
diagram 2:                    ！输出图表2 @il}0  
O^%ace1  
"Variation ofthe Pump Power" .WE0T|qDX  
N<(`+?  
x: 0, 10 Hv*O9!cC  
"pump inputpower (W)", @x >G~;2K[  
y: 0, 10 io3'h:+9s  
y2: 0, 100 +0 |0X {v  
frame @cGql=
t  
hx JCfToFB  
hy 3U$fMLx]k  
legpos 150, 150 e,UgTxZ  
=ApT#*D)o  
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 /U]5#'i  
  step = 5, ttVSgKAsm  
  color = blue, I GtH<0Du  
  width = 3, b7j#a#  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 =o
DrN7`,B  
  finish set_P_in(pump, P_pump_in) wJkkc9Rh'(  
`VN<6o(  
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 >E=a~ O  
  yscale = 2, [rsAY&.  
  step = 5, P[i/
o#  
  color = magenta, EtGr&\,  
  width = 3, CNYchE,}  
  "population of level 2 (%, rightscale)", T9?_ `h  
  finish set_P_in(pump, P_pump_in) Y%@'a~  
l}/UriZ0  
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 Z U
v_u6aD  
  yscale = 2, b] V=wZ o  
  step = 5, 1Tr=*b %f  
  color = red, RBwV+X[B  
  width = 3, B=`!  
  "population of level 3 (%, rightscale)", /p"R}&z  
  finish set_P_in(pump, P_pump_in) Z4' v  
7yl'!uz)9  
pE,BE%
 
; ------------- IA`  
diagram 3:                         ！输出图表3 B.#0kjA}  
W:J00rsv=`  
"Variation ofthe Fiber Length" 8 K!a:{  
wf1DvsJQl  
x: 0.1, 5 iwJgU b  
"fiber length(m)", @x iSlVe~ef  
y: 0, 10 E!M+37/  
"opticalpowers (W)", @y b
mpB$@  
frame ;7>--_?=  
hx +i =78  
hy &ii =$4"R  
"(qO}&b>  
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 l/LUwDI{  
  step = 20,             o+&sodt|`  
  color = blue, xd<68%Cn  
  width = 3, |0-L08DW  
  "signal output" C@i
g3fhV  
dD%m=x  
;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 nv]64mL3  
   step = 20, color = red, width = 3,"residual pump" bT}
WJ2}  
QCw<* Id+  
! set_L(L_f) {restore the original fiber length } }.zn:e
 
*TkABUL  
v( B4Bz2  
; ------------- ZxWV,s&p  
diagram 4:                                  ！输出图表4 }I]q$3.  
XjbK!.  
"TransverseProfiles" ,e,{6Sg6gl  
!k63`(Ti  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) #Uu"olX7  
H@:@zD!G[  
x: 0, 1.4 * r_co /um /xzL!~g`6<  
"radialposition (µm)", @x , +^db)  
y: 0, 1.2 * I_max *cm^2 CiSG=obw  
"intensity (W/ cm&sup2;)", @y @ 2_&ti  
y2: 0, 1.3 * N_Tm =
g:\R$lQ  
frame .9ne'Ta  
hx I1,?qr"Zr  
hy 1Rh&04O>VL  
plq\D.C  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 '4rgIs3=x"  
  yscale = 2, o%a$m9I  
  color = gray, `U
R.Rn/x  
  width = 3, 0% /M& N  
  maxconnect = 1, Fh'Jb*|Q  
  "N_dop (right scale)" MgekLP)&  
eu=2a>  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 Tp7?:YY|  
  color = red, EbQ}w"{  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 DH%X+r  
  width = 3, sMx\WTyz  
  "pump" J
Y,+
eD  
!IS,[  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 {`LV{!  
  color = blue, <#UvLll  
  maxconnect = 1, G r)+O  
  width = 3, K5$ y  
  "signal" z,tax`O  
XV&3h>5  

|8B[yr.b  
; ------------- ^RyrUb  
diagram 5:                                  ！输出图表5 5eYCnc9  
f
OJyY[  
"TransitionCross-sections" Sv ,_G'  
~VK
w%WK  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) iq#Z\Y(  
gS%J`X$  
x: 1450, 2050 "O4Z).5q3  
"wavelength(nm)", @x ;p/@tr9  
y: 0, 0.6 [,dsVd  
"cross-sections(1e-24 m&sup2;)", @y D+V^nCcx%  
frame c
1`o3gb  
hx
F2&KTK  
hy }\W3a_,v)  
p82qFzq#  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 #L"h>,b  
  color = red, t`?FSV  
  width = 3, ]mp.KvB  
  "absorption" Wq4?`{  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 U;(&!Ei  
  color = blue, a4
wh-35/  
  width = 3, }IV7dKzl  
  "emission" QMIXz[9w  
UX?_IgJh<"  

感谢，视频上有点看不清楚