04-一种Rb蒸气对窄线宽780nm激光吸收率和吸收峰的测量方法
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:
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VWXYKL+.Z[\./]Rb<.^780nm01HIJ-,_`1a8787nmbcde/
01f
(LD)。IJgHKL,hijkl780nm01ijRb<.=m011nRoHpqYr。
STOPVW^st261kPaHe.u0.551kPaCH4 [\./H Rb<.HIJ-uIJgvw
9KL
,
xy9zVW{t|+HKL}~
。
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(DPAL);Rb<.01;IJ-;NUIJ;IJg
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:TN248.2 +,-./:A +01*:10050086(2012)11216806
犕犲狋犺狅犱犳狅狉犿犲犪狊狌狉犻狀犵犚犫狏犪狆狅狉′狊犪犫狊狅狉狆狋犻狏犻狋狔犪狀犱犪犫狊狅狉狆狋犻狏犲狆犲犪犽
狅犳780狀犿犾犪狊犲狉狑犻狋犺狀犪狉狉狅狑犾犻狀犲狑犻犱狋犺
LIZhiyong1,2,TANRongqing1,XUCheng1,2,LILin1,2,HUANGWei1,2
(1.DepartmentofHighPowerGasLaser,InstituteofElectronics,ChineseAcademyofSciences,Beijing100190,
China;2.GraduateUniversityofChineseAcademyofSciences,Beijing100049,China)
犃犫狊狋狉犪犮狋:AnaccuratemeasurementmethodforRbvapor′sabosrptivityandobsorptivepeakto780nm
laserwithnarrowlinewidthunderhighpressurebuffergasisproposed.Basedontheprincipleofdiffer
entialabsorption,asinglelaserdiode(LD)withcentralwavelengthof787nmisusedasareference
beamsourcetoeliminatetheerrorofabsorptivitybroughtbytheRbvaporcell′suncoatedinnersur
faces.Theabsorptivepeakismeasuredthroughthedipofthespectraobservedafter780nmlasertrans
mittedthroughtheRbvaporcell.Higheraccuracyofthismethodisverifiedbythemeasurementofthe
absorptivityandabsorptivepeakfortheRbvaporwithbuffergasesof261kPaHeand51kPamethane.
犓犲狔狑狅狉犱狊:diodepumpedalkalilaser(DPAL);Rbvaporlaser;absorptivity;differentialabsorption;ab
sorptivepeak
1 2 3
LDRb<.0123
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Krupke[1]QR9。z
01fH23o1 RbH犇2
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i Rb<.=!s®
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。
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GHz)LDÇ81¸,40kPaC2H2 Ç8[\.
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kPaCH4 u60kPaHe.Ç8[\./HRb<.
=110℃]vwHIJxhÊËIJ-Ì8
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犈犿犪犻犾:lizhiyong_1226@126.com
4567
:20120605 8967:20120626
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}~
。
2 :;<=
xõæö÷1*Ë。LD1uLD2ø8bc
LD,STùú600μm ûüýÞþuÿ!8250
mmH"#ýÞþU$^%&'vwXù[5],(
Ü)LDHR1B! Rb<.=H!*±O«·。
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-æ9/./011
,
o9LD2H¡¢Z½u
234H01R
[6],
x!Ç8780nm01
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ijÜBD AuHCuþ¨LD1
H01®5É Rb<.=HV6· LD2«·,·
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jRb<.=。
'1 :;<=>?':1.@A600μ犿BCDEF;2.GHIJKLMNOPQ;
3.RS250犿犿KTUDEF;4.VWXYZK[犃狌K犆狌\]F;5.[犃狌K犆狌\]F
犉犻犵.1 犛犮犺犲犿犪狋犻犮犱犻犪犵狉犪犿狅犳犲狓狆犲狉犻犿犲狀狋犪犾狊犲狋狌狆:1.犛犻犾犻犮犪犮狔犾犻狀犱狉犻犮犪犾犾犲狀狊狑犻狋犺犱犻犪犿犲狋犲狉狅犳600μ犿;
2.犞狅犾狌犿犲犅狉犪犵犵犵狉犪狋犻狀犵狑犻狋犺犮狅狀狋狉狅犾犾犲犱狋犲犿狆犲狉犪狋狌狉犲;3.犘犾犪狀狅犮狅狀狏犲狓犾犲狀狊狑犻狋犺犳狅犮狌狊犾犲狀犵狋犺狅犳250μ犿;
4.犆狌狉犲犳犾犲犮狋狅狉犮狅犪狋犲犱狑犻狋犺犃狌犪狀犱狑犻狋犺犳犻狀犲犾狅犮犪狋犻狅狀犮狅狀狋狉狅犾狊狔狊狋犲犿;5.犆狌狉犲犳犾犲犮狋狅狉犮狅犪狋犲犱狑犻狋犺犃狌
LD1H´®±
NUIJHµ¶[7],¨ K
HIJ-ó´XY
。
NUIJVW!MNÜO0
1
,
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,
SRK./TUIJ
,
VO
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RK./HI
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5
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/./011±
1_`abHQ1$
Ycde
,
ij^LDQfYcoLDH¡¢Z
½
[8]。
x!
,
STH11g81.4mm,i1@
ú812mm×1.5mm,PD_LDhi´jDÇ。
LD25℃¸H!¥¦§8787nm,` kÉLDH
Û~l8m80.3nm/K,ÍÎ,x!ijde
/DnÝoD_pÛ~
,¨ LD2H_pÛ~]q
25~30℃,Hâ¨LD2\r¸H1n!¥¦
§780nms¬。VBGZ½?mH,-&tu
¡u1n÷ö÷2*Ë。
/./011H!¥¦§vÛ~{tl
8ñò
,
ÍÎ
,
ijwx11Û~2o VBG
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AlDßy:。ßy@4itz{,ijoDt
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~Û~^ VBGÛoHïð,o9&
t2A¸LD!¥¦§H779.92nmÉ780.43nm
34
,
¡¢±OÏx
,
I0.20±0.01nm。
3.2 Rb)*+,-.
x!,Rb<.=t}i1@ú8A,ù
ú87mm,§815mm。%&'XùA@
1Bm
,LD01ij Rb<.=¸H1Eùú
5.5~6.0mm,èJKij Rb<.=,0
·9612·×11Ù :QRb<.^½¡¢780nm01IJ-uIJgHKLVW
1"ø5T~¯
3.2W/cm2(LD01®
5,-8650mW,&t82A)。89¨ Rb
H犇2IJ¡¡¢ 1¡¢«£¤,[´%
RbH犇1¡u RbH犇2¡Ü:èªH
-
。
Û]
,
Rb<.=@s®2.5×101.
325kPaHe.u0.5×101.325kPaCH4。¨ LD
01!¥¦§H780.43nm 34¾779.92nm。
34j!
,
Rb<.=mH1nôKÉH1
nö÷3*Ë。
'2 (犪)`abcdeKfghij`;(犫)犔犇klmno`abceKPp'
犉犻犵.2 (犪)犘狅狑犲狉狏狊.犮狌狉狉犲狀狋犫犲犳狅狉犲犪狀犱犪犳狋犲狉犾犻狀犲狑犻犱狋犺犻狊狀犪狉狉狅狑犲犱;(犫)犛狆犲犮狋狉犪狅犳犳狉犲犲狉狌狀狀犻狀犵犪狀犱犾犻狀犲狑犻犱狋犺狀犪狉狉狅狑犲犱犔犇狊
'3 180℃q,rs&tuvK犔犇wx犚犫yz{deKPp:(犪)780.10狀犿;
(犫)780.05狀犿;(犮)780.00狀犿;(犱)779.95狀犿
犉犻犵.3 犛狆犲犮狋狉犪狅犳犔犇犫犲犪犿狊狑犻狋犺犱犻犳犳犲狉犲狀狋犮犲狀狋狉犪犾狑犪狏犲犾犲狀犵狋犺狊犫犲犳狅狉犲犪狀犱犪犳狋犲狉狆狉狅狆犪犵犪狋犻狀犵狋犺狉狅狌犵犺狋犺犲犚犫狏犪狆狅狉犮犲犾犾犪狋180℃:
(犪)780.10狀犿;(犫)780.05狀犿;(犮)780.00狀犿;(犱)779.95狀犿
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[9],
261kPaHe.u51kPaCH4 Ç8[\./
¸
,
zn¡^ÑH!¥¦§8779.95nm;2)LDH
!¥¦§RbH犇2n¡^ÑH!¥¦§§¸,0
1ijRb<.=mH1n!¥¦§8,¡¢«
ÑHx½
;3)vLD01¬RbH犇2IJ
¡
,
01ÞjRb<.=mH1nᦧRo
pq
。
ãä¶ ¡]
,261kPa、He.u51kPaCH4
Ç8[\./¸
,
¡¢´¢¾m0.1nm。¢,ij
x!ôK01Þj Rb<.=mH1n,2
o
,RbH犇2IJ¡H¡£4U^1t|T
HIJ
,
Rb<.01¶ «¤[10]。
ij1nôKVW,RbH犇2IJg^Ñ
H!¥¦§8779.95nm。vm,ijNUIJHV
Wvw9IJ-HKL
。Rb<.^779.95nmLD
01HIJv Rb<.=Û~Hx¥ö÷4*Ë。
÷!
,Rb<.ZP¦[11]!*§_С]R。
'4 犚犫yz|779.95狀犿}PK~4go
犚犫yzb犚犫yz{IK
犉犻犵.4 犚犫狏犪狆狅狉′狊犪犫狊狅狉狆狋犻狏犻狋狔狅犳犾犪狊犲狉犪狋779.95狀犿
犪狀犱犚犫狏犪狆狅狉狆狉犲狊狊狌狉犲狏犲狉狊狌狊犚犫狏犪狆狅狉犮犲犾犾′狊狋犲犿狆犲狉犪狋狌狉犲
÷42R:1)Û~H¨+,¨ Rb<.
=@<.ZuRbµ'Щ´,vâ¨Rb<.^
01HIJ-©
;2)80~160℃,Rb<.Z
H©´¨Rb<.^01HIJ-H18.9%©´
¾91.4%,IJ- Rb<.Z·ª:¨;¢160
℃m,Rb<.Z«ç¬
©´,^ IJ-HQ+ï
ðÏ
。
Qo®HRo2LD01ijRb<
.=mH1n¯°
。
x!
,
¹T+U±-
(
U±-
80.03nm)H1²1nS³LD01ij´)Û
~]Rb<.=mH1n,1n÷ö÷5*Ë。v
Û~H:¨
,Rb<.H犇2IJ¡^Ñ¡¢µ¶@
HLD01SIJH··¸,¹Rb<.=Û~È
É180℃¸,779.95nms¬Ro|8ºÊHp
q
,
1±OSIJ
。
'5 rsIq,0.20狀犿`aK779.95狀犿
}Pwx犚犫yz{eKPp'
犉犻犵.5 犛狆犲犮狋狉犪狅犳779.95狀犿犾犪狊犲狉狑犻狋犺犾犻狀犲狑犻犱狋犺
狅犳0.20狀犿犪犳狋犲狉狆狉狅狆犪犵犪狋犻狀犵狋犺狉狅狌犵犺狋犺犲
犚犫狏犪狆狅狉犮犲犾犾犪狋犱犻犳犳犲狉犲狀狋狋犲犿狆犲狉犪狋狌狉犲狊
3.3 /0123
LD1H´®Rb<.IJ-KL!»U¼
ÔH
。
<.01f!
,
>?Ý@ABDH
E01u+ÛHÇT]
,
Rb<.YÑ,vâ
½¾>?Ý
。
ÍÎ
,
¿Ì^>?ݺABDE
。
κ
,
ÀÁû>?Ý¥$òÂr(ÃÄÅà+
,
¶ÆHRb<.=>?Ý[12]。ãäÇÈÉY5Ê5
hË
[13],
01ijÜ)>?Ý
(
Ü)@ABCDE
),
Ï`kÌÍY5
。
¹1ή5¸
,
ÏHÞj-
犜total8
犜total=犜SRb犜Rb-S=
16狀2S狀2Rb
(狀S+狀Rb)4
=84% (1)
P!
,狀S=1.8,8ÀÁû>?ÝÊ5-。ÐÑRb<
.Ê5-狀Rb=1.0。ÍÎ,öÒϹT787nm01
^Þj-vwÓÎ
,
KHÞj-ÏèJKYÔRb
<.^1HIJ
。
A1Rbµ'©.!
780.03~794.76nm¦§µ¶@HIJ¡P^Ñ
HèªÕÖ
[13]。
A12R,Rbµ'787nm(¡¢8
1.8nm)s¬×tIJ,Òc[\./H´®¨
Rbµ'HIJ¡´¢[Ø7l8,¢787nm¡
¢1.8nmH01ÙÏRbµ'HIJ¡µ¶@。
κ
,787nm 780nm ¦§«N|¯,ÍÎST
·1712·×11Ù :QRb<.^½¡¢780nm01IJ-uIJgHKLVW
787nmbcLDÇ8_`1¤+NUIJHKLµ ¶。
1 犚犫
780.03~794.76狀犿K~4`|K[14]
犜犪犫.1 犚犫犪犫狅狊狉狆狋犻狅狀狑犪狏犲犾犲狀犵狋犺狊犪狀犱犮狅狉狉犲狊狆狅狀犱犻狀犵犲狀犲狉犵狔犾犲狏犲犾狋狉犪狀狊犻狋犻狅狀狊犳狉狅犿780.03狀犿狋狅794.76狀犿
Observed
wavelengthin
air/nm
犈犻
/cm-1
犈犽
/cm-1 Configuration Terms 犑犻-犑犽
780.0268 0.000 12816.545 4狆65狊-4狆65狆 2犛2犘0 1/23/2
792.5260 19355.203 31969.616 4狆64犱4狆68犳 2犇2犉0 5/27/2
792.5537 19355.649 31969.621 4狆64犱4狆68犳 2犇2犉0 3/25/2
794.7603 0.000 12578.950 4狆65狊4狆65狆 2犛2犘0 1/21/2
vwRb<.IJ-KL¸,ÑsU`k
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+.Z[\./],RbH犇2IJ¡!¥g
Ø7l8
。
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2l8mHIJg
。
¢
,
¹¯,-Ú~0
1ÞjRb<.=¸,ijKL,-|à}YáRI
JgHåæ
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80.05nmm,«·Û~(180℃)],SRb<.I
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OPQRI
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,
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,
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0.03nm。^
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a
[17],0.03nmHU±-ä±O2åæÔ
ç
。
4 ^od
QR9Q±
NUIJµ¶HKLRb<.
^½¡¢780nm01IJ-uIJgôKHVW。
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~l8ñòo780nm½¡¢23401,çmi
j&'XùþuA@1BH´®^LD1Eê,¨
LD01ëìíijRb<.=。·¸,Kî
!
,´
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-
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H1nRoHpqRÏ·_L]^ÑHRb<.
IJg
,
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:
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。
+,
:
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