Two-photon optically pumped laser

Thomas A. DeTemple, Ho Kyoon Chung, Samuel J. Petuchowski

Daniel J. Gauthier

Han Seb Moon, Heung‐Ryoul Noh

We have investigated the optical pumping effects of single-resonance optical pumping (SROP) and double-resonance optical pumping (DROP) in the ladder-type electromagnetically induced transparency (EIT) of the 5S1/2–5P3/2–5D3/2 transition of 87Rb atoms. In the 5S1/2(F = 2)–5P3/2(F' = 3)–5D3/2(F'' = 2, 3) transition with the single-resonance cycling 5S1/2(F = 2)–5P3/2(F' = 3) transition, we observed the transmittance spectrum due to DROP and EIT. Based on our experimental results investigated according to the laser power (the probe and the coupling) and the coupling laser detuning, we revealed that DROP was significant for the transmittance spectrum. Particularly, in the 5S1/2(F = 2)–5P3/2(F' = 1, 2)–5D3/2(F'' = 1) transition without a cycling transition, we observed the two-photon absorption due to two-photon atomic coherence, when the probe laser power was weak and the coupling laser power was strong.

B. Nikolaus, D. Z. Zhang, P. E. Toschek

Timofey D. Petukhov, Viktor B. Sukhanov, Gennadiy S. Evtushenko

This paper considers the experiments on nonresonant optical pumping of sodium D-lines. Na-Xe medium is pumped by a dye laser with a wavelength of 560 nm and output energy of 5 mJ and CuBr laser with wavelengths of 510.6 and 578.2 nm and the total output energy of 0.5 mJ (0.2 mJ at 578.2 nm). Receiving radiation when pumped with a copper bromide laser indicates the presence of an effective pumping mechanism via two-photon absorption.

Daniel J. Gauthier, Hope M. Concannon