铯原子and铷原子D1、D2线光谱

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1、【请教】外腔可调激光器，选那一种？最近实验室可能要买一台波长连续可调的激光器，联系了两个厂家的，一个是德国的sacher公司，另一 个是美国的 New focus 公司我们需要的规格大概是中心波长780 800nm左右，调谐范围20nm，功率10 20mW，输出功率在整个调谐 范围内基本不变。两个公司相中的型号分别是sacher : http:/www.sacherThtt p:/www.sacher-http:/data.sacher-New focus： o二TLB%2D6312以我自己非专业的眼光仔细比较了一下，发现两个公司的产品基本上相当，而售价前者为1W欧元多，后 者是2W美刀。ne

2、wfocus的好像更有名些，国外的同行也推荐的是这个，技术支持也相当到位，我把他们 网站上提供的mannual看了看，学到不少东西，好像他们的激光器的计算机接口也做的蛮全。但与sacher 的lion系列比，他们的velocity系列控制面板简陋许多，唯一吸引人的就是可以实时显示工作波长，而 这个好像sacher的不行。而sacher的不仅便宜一些，而且看起来控制面板相当专业，感觉可以自己定制 的激光器工作参数比较丰富，体现出德国人工作严谨认真的风格，但从他们的网站上，我也没能获得关于 该激光器更深层次的信息，觉得很没底，不知道究竟怎么样。我们决定在12月份定下来一台，不过现在两个好难选择，有

3、没有比较了解这两个公司产品的朋友能够给 点参考意见？ 万分感谢，比较急，谢谢大家指教了我认为，还是Sacher的比较好一点，因为光机所用到现在正在打算购置新的波段的；Sacher是专门做这 个的！ Newfocus在其他很多方面比较有名气，而且他的产品也很好，但是做外腔可调激光器不是Newfocus 的专长；一孔之见这个东东市场太小了，而且操作要求技术高一些，也就那几个公司做。你想用的爽，就用Newfocs,你想用 的合算，就用Sacher.你要是胆子大，你就用其他品牌的吧。Caesium Spect roscopy - D1 LineCaesium is a very reactive al

4、cali metal of the first group of the table of elements. It was first discovered by Bunsen and Kirchhoff in 1860 using spectroscopic investigations. It is characterized by one valence electron.【ae 1fluaK尽uuaffla)o o0Aw】7 6o o s9 s B 71F = 3-61Pir?J = 3J J JQuo 114吐 RM4P4 口X4晶Ralitlva Frequ&nty MHi |-

5、UQII1QIQThe spectra show the saturated absoption of the D1 line of Caesium at 895nm. The spectra are detected with a continuous scan with a Sacher Lasertechnik tunable diode laser system.Caesium Spectroscopy -D2 LineCaesium is a very reactive alcali metal of the first group of the table of elements.

6、 It was first discovered by Bunsenand Kirchhoff in 1860 using spectroscopic investigations. It is characterized by one valence electron.5co 5200Relative Frequenay MHz 0.200.1 6O,ij1JCs-2 :-20 02000.03Relative Frequency GHz F= 35d70 GHz4.021 GHz0.07Q.O50.0411 1恆,F4-FP钮，F3,4】- 200& Sacher lasertEchnik

7、 GmbH 1L_Kb 1L1-400The spectra show the saturated absoption of the D? line of Caesium at 852nm. The spectra are detected with a con ti nu ous sca n with a Sacher Lasertech nik tun able diode laser system.Rubidium Spectroscopy - D1 LineRubidium is a very reactive alcali metal of the first group of th

8、e table of eleme nts. It was first discovered by Bunsen and Kirchhoff in 1861 using spectroscopic in vestigati ons. Due to its typical red color of the spectral lines it was n amed after the Lat in word rubidus (darkred ) It is characterized by one vale nee electr on. The n atural abundance of Rubid

9、ium isotopes is 85Rb(72.2%) and 87Rb(278%)0.1250.1000.075 20QS, Sacher Lasertechnik GrubH0.0500.560,500.45E - u 口一inln-LUinueJl srtral-E 】ffiu.?g peuuEfflBOjSO*Ii00250000500Relative Frequency MHzThe spectra show the saturated absoption of the D2line of Rubidium at 795nm. The spectra are detected via

10、 one continuous scan with a Sacher Lasertechnik tunable diode laser system.d2.htmlRubidium Spect roscopy - D2 LineRubidium is a very reactive alcali metal of the first group of the table of eleme nts. It was first discovered by Bunsen and Kirchhoff in 1861 using spectroscopic investigations. Due to

11、its typical red color of the spectral lines it was named after the Latin word rubidus (darkred). It is characterized by one valence electron. The natural abundance of Rubidium isotopes is 85Rb(72.2%) and 87Rb(27.8%).【E 一InUBtApaoep一岔【EuQ-ss-EDllnJI.L【E - -BUB曲 p 也QUB-RfflI-IAEeQ-WWIWCEH .1 心硏 ej0x06

12、0,04F=2F=2 co 3The spectra show the saturated absoption of the D line of Rubidium at 780nm. The spectra are detected with a con ti nu ous sca n with a Sacher Lasertech nik tun able diode laser system.http:/www.sacher- spectroscopy/rubidium eit ladder.htmlElect romagnetic Induced Transpa rancy (EIT)E

13、lectromagnetic Induced Transparency (EIT)Elect romagnetic Induced Transpa rency (EIT) in a thr ee-level ladde r-type Dopple r-br oadened medium, paying special attention to the case where the coupling and pr obe beams are counte r pr opagating and have simila r frequencies as to r educe the Dopple r

14、 width of the two photon pr ocess.The pumping lase r of wavelength 775.76nm couples the uppe r tr ansition from state 5%, F=4 (state |2) to state 5D5/2, F=5 (state|3) and the pr obe wavelength of 780nm couples one hype rfine tr ansition of state 5S1/2, F=3 (state|1) to state 5P3/2, F=4 (state|2) whi

15、ch is the Rubidium D2 line, Review Min Xiao et. al, Phys. Rev. A51, 576-584 (1995) for therory and experimental setup.The data show the experimental resuIts for Rubidium vapor at room temperature. The violet curve shows the Doppler broadened Rubidium D2 spectrum determined via a low power laser syst

16、em as reference. The yellow curve shows the EIT signal. The position of the EIT dip can be adjusted via the wavelength of the pump laser.http:/www.sacher- spectroscopy/water vapour.htmlWate r Vapor Spectroscopy1388,4 1388,2 1388,0 1 387,8 1 387.6 1307,4Wate r is the most imp ortant molecule on earth

17、. Without water, the re would be no life possible on this planet.Howeve r, in some applicati ons the amou nt of wate r vap or n eeds to be exactly measu red. In the Hit ran datebase, many tr ansitions can be found, and the re are serveral strong abs or ption lines the 1390nm r egime, for example. So

18、me of these strong line at 1388nm are shown in the figu re, detected with a simple wate r vap or abs or ptionod cm1In this figu re, the detected optical density at the abs or ption maximum at a line at 1367.86nm is plotted ver sus the abs or ption coefficient calculated acc or ding to the Hit ran da

19、tabase.egIn ano the r expe rime nt, wavele ngth modulati on spect roscopy was accomplished by mix ing a low and a high tuning frequency. The 2f abs or ption spect ra recor ded with a Lock-In amplifie r are shown in the figu re.These expe riments have been perfor med with our TEC100 Littrow Lase r System, as well as with our TEC500Littma n Lase r System. We gr atefully ack no wledge finani cal supp ort by the BMBF with in contr act 13N7157. For more details, please check our publications.色