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Optical pumping of Rb by Ti:Sa laser and high-power laser diode

Z. BUCHTA1,2,* , J. RYCHNOVSKÝ1,3, J. LAZAR1

Affiliation

  1. Institute of Scientific Instruments, Academy of Science of the Czech Republic, Královopolská 147, 61264 Brno, Czech Republic
  2. Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 61669 Brno, Czech Republic
  3. Institute of Electrotechnology, Faculty of Electrical Engineering and Communication, Brno University of Technology, Údolní 53, 602 00 Brno, Czech Republic

Abstract

We present a laser system based on a tunable Titanium:Sapphire (Ti:Sa) laser optimized for maximum efficiency of the optical pumping process of Rb atoms. The system represents the first and crucial part of the HpG (hyperpolarized gasses) production process. It was designed for laboratory purposes where the expensive and complicated Ti:Sa laser is justified because of its variability, narrow linewidth and easy tuning of the wavelength. The system consists of a modified commercial Ti:Sa laser pumped by a Nd:YAG laser, beam-forming and polarizing optics, and heated interaction cell attached to a vacuum manifold and gas containers placed in homogeneous magnetic field generated by a set of Helmholz coils. Furthermore we describe another laser system based on a high power semiconductor laser. It is designed to operate in medical and industrial applications to come. We concentrated on the lased diode emission linewidth reduction because of the efficiency of the optical pumping process. The emission linewidth was reduced approximately from 1 THz to 100 GHz..

Keywords

Optical pumping, Ti:Sa laser, Laser diode, Emission linewidth, Spectroscopy, Laser frequency stabilization.

Submitted at: Sept. 12, 2005
Accepted at: Jan. 26, 2006

Citation

Z. BUCHTA, J. RYCHNOVSKÝ, J. LAZAR, Optical pumping of Rb by Ti:Sa laser and high-power laser diode, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 1, pp. 350-354 (2006)