Pearman, C. P. and Adams, C. S. and Cox, S. G. and Griffin, P. F. and Smith, D. A. and Hughes, I. G. (2002) 'Polarization spectroscopy of a closed atomic transition : applications to laser frequency locking.', Journal of physics B : atomic, molecular and optical physics., 35 (24). pp. 5141-5151.
We study polarization spectroscopy of Rb vapour. A weak probe beam analyses the birefringence induced in a room temperature vapour by a strong counterpropagating circularly polarized pump beam. In contrast to most other work on polarization spectroscopy, we use a polarization beam splitting cube and two detectors (rather than a polarizer and one detector) to analyse the probe beam. The signal is in the form of a derivative of a Lorentzian. For theoretical analysis we study the closed atomic transition 5 2S1/2 (F = 3) --> 5 2P3/2 (F' = 4) in the D2 line of 85Rb. We study the time needed to redistribute population among the mF states, derive an expression for the expected lineshape and present experimental data in excellent agreement with theory. The polarization spectrum provides an ideal error signal for frequency stabilization of a laser. We describe the geometry and parameters for optimizing the error signal.
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|Publisher Web site:||http://dx.doi.org/10.1088/0953-4075/35/24/315|
|Date accepted:||No date available|
|Date deposited:||No date available|
|Date of first online publication:||December 2002|
|Date first made open access:||No date available|
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