Theoretical analyses of an injection-locked diode-pumped rubidium vapor laser

Abstract

Diode-pumped alkali lasers (DPALs) have drawn much attention since they were proposed in 2001. The narrow-linewidth DPAL can be potentially applied in the fields of coherent communication, laser radar, and atomic spectroscopy. In this study, we propose a novel protocol to narrow the width of one kind of DPAL, diode-pumped rubidium vapor laser (DPRVL), by use of an injection locking technique. A kinetic model is first set up for an injection-locked DPRVL with the end-pumped configuration. The laser tunable duration is also analyzed for a continuous wave (CW) injection-locked DPRVL system. Then, the influences of the pump power, power of a master laser, and reflectance of an output coupler on the output performance are theoretically analyzed. The study should be useful for design of a narrow-linewidth DPAL with the relatively high output.

Simulations of the exciplex pumped alkali laser using temperature-dependent energy pooling reactions

“…These findings support the general conclusions of prior flowing XPAL simulations [Xu, 2017;Huang, 2019;Su, 2021] that increased flow speed should raise efficiency while lowering lasing region temperature, but the inclusion of the temperature-dependent energy pooling reaction rates in future modelling is recommended. 3 for Rb energy pooling compare with limited available experimental data [Barbier 1983;Cai, 2018]. Figures 9 and 10 show how the rates in Table 4 for K energy pooling compare with limited available experimental data [Namiotka, 1997].…”

“…Experimental data for temperature-dependent energy pooling rates is much scarcer for Rb than for Cs. Barbier and Cheret [1983], Mu et al [2006], and Cai et al [2018] indicate cross sections for Rb that are similar in magnitude to those of Cs and estimated rates as a function of temperature are baselined to information in [Barbier, 1983;Cai, 2018], Table 3. However, because the energy gap is significantly smaller for Rb(5 2 P3/2) + Rb(5 2 P3/2) → Rb(5 2 D3/2, 5/2) + Rb(5 2 S1/2) reactions than the equivalent Cs reactions, the estimated peak rate constants are higher by almost an order of magnitude, Table 3.…”

“…Figures 7 and 8 illustrate how the rates in Table3for Rb energy pooling compare with limited available experimental data[Barbier 1983;Cai, 2018]. Figures 9 and 10 show how the rates in Table4for K energy pooling compare with limited available experimental data[Namiotka, 1997].…”

“…Figure 8. Temperature dependent rates from Table3for the Rb(6 2 P1/2) + Rb(6 2 P1/2) energy pooling reactions compared to available data[Cai, 2018].…”