A laser spectroscopy system with combined absorption, polarization rotation and fluorescence detection to study two photon transitions in atomic rubidium

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• 作者：Oscar Ló ; pez-Herná ; ndez^a ; Santiago Herná ; ndez-Gó ; mez^a ; Francisco Sebastiá ; n Ponciano-Ojeda^a ; Cristian Mojica-Casique^a ; Ricardo Colí ; n-Rodrí ; guez^a ; Jesú ; s Flores-Mijangos^a ; Daniel Sahagú ; n^b ; Fernando Ramí ; rez-Martí ; nez^a ; ^{ferama@nucleares.unam.mx" class="auth_mail" title="E-mail the corresponding author} ; José ; Jimé ; nez-Mier^a
• 关键词：Laser spectroscopy ; Two-photon transition ; Rubidium
• 刊名：Journal of Applied Research and Technology
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：13
• 期：6
• 页码：543-550
• 全文大小：1736 K

文摘

The design and construction of an experimental system for studying two photon spectroscopy processes in atomic rubidium is presented. It is designed to measure absorption and polarization rotation induced by any of the two laser beams and also the visible fluorescence that results from decay of the excited states. Two home-built diode lasers are used to produce the optical fields that later interact with room temperature rubidium atoms. Using counterpropagating beams allows velocity selection of the groups of atoms that interact with both laser beams. The system was tested in the 5 S → 5 P_3/2 → 5 D_j ladder energy level configuration of atomic rubidium. Blue fluorescence (420 nm) that results from decay of the intermediate 6P_j states is filtered and then measured with a photomultiplier tube. Absorption and fluorescence spectra provide mutually complementary information about the interaction between the rubidium atoms and the two optical fields.