Two photon addition in coupled Er3+ ions in glasses

A. Stoita, Stéphan Guy, B. Jacquier

Francois E. Auzel, Yihong Chen

M. R. Brown, H. Thomas, James M. Williams +2 more

The pumping intensity and concentration dependences of the fluorescence output from three infrared quantum-counter schemes that involve coupled ions in Er3+-doped SrF2 have been measured at 300 and 77°K. The pumping intensity depended linearly on the numbers of photons absorbed in the schemes. The power of the concentration dependence was found to be noninteger in the range 1%–10%. This has been interpreted as indicating the importance of energy migration between the Er3+ ions as mechanism for populating the energy levels of the coupled ions.

Michal F. Lipson, Lionel C. Kimerling

Shian Zhang, Chenhui Lu, Tianqing Jia +2 more

We theoretically and experimentally demonstrate the quantum coherent control of the resonance-mediated two-photon absorption in rare-earth ions by the phase-shaped femtosecond laser pulse. Our theoretical results show that the resonance-mediated two-photon absorption can be effectively controlled, but the control efficiency depends on the laser repetition rate in real experiment due to the long lifetime and the short decoherence time of the excited state, and the larger laser repetition rate yields the lower control efficiency. These theoretical results are experimentally confirmed in glass sample doped with Er3+ by utilizing the femtosecond lasers with low repetition rate of 1 kHz and high repetition rate of 80 MHz.

Michal F. Lipson, T.D Chen, Desmond Rodney Chin Siong Lim +5 more