Two-color polarization spectroscopy of rubidium |
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| Authors: | P Kulatunga HC Busch LR Andrews CI Sukenik |
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| Institution: | 1. Department of Physics, Lawrence University, Appleton, WI, 54911, USA;2. Department of Chemistry, Physics and Astronomy, Georgia College & State University, Milledgeville, GA 31061, USA;3. Department of Physics, Old Dominion University, Norfolk, VA 23529, USA;1. Department of Physics, Indian Institute of Science, Bangalore-560012, India;2. Institute for Physical Research, NAS of Armenia, Ashtarak-2, 0203, Armenia |
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| Abstract: | We report on two-color, two-photon polarization spectroscopy in a room-temperature rubidium vapor. We use two separate lasers, a strong pump at 780 nm to induce an anisotropy in the atomic polarization and a weak probe at 776 nm to interrogate this anisotropy. The lasers are resonant with the 52S1/2 → 52P3/2 and 52P3/2 → 52D5/2 transitions in rubidium, respectively. Finally, we have used our polarization spectroscopy signal as an error signal to lock the 776 nm laser. This modulation-free locking scheme allows us to detune the lock point of the second laser by adjusting the detuning of the laser used for the first transition. |
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