Review of alkali laser research and development

Zhdanov, B. V.; Knize, R. J.

doi:10.1117/1.oe.52.2.021010

Cited by 111 publications

(40 citation statements)

References 55 publications

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“…As the medium of a DPAL is in gas-state, the thermally-induced effect for high-powered operations should be lower than the most conventional DPSSL systems [9][10][11]. However, if the output of a DPAL is up to several kilowatts, the thermally-induced effect cannot be simply ignored [12,13].…”

Section: Introductionmentioning

confidence: 96%

Mathematical simulation of heating effects in a static diode-pumped vapor rubidium cell

Zhang¹,

Wang²,

Han³

et al. 2015

SPIE Proceedings

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Diode-pumped alkali lasers (DPALs) have attracted a lot of interests in the recent years because of their high Stokes efficiency, good beam quality, compact size, and near-infrared emission wavelengths. Until now, the thermal features have been only analyzed in an open alkali cell. In this report, we established a mathematical model to examine the heating effect of a static sealed rubidium cell by means of a Finite Difference (FD) procedure. After assuming the absorption coefficient of the alkali vapor, the temperature distributions of a real sealed rubidium vapor cell have been acquired for different powers and beam waists of the pump. The analytic conclusions would be helpful in designing a feasible DPAL.

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Section: Introductionmentioning

confidence: 96%

Mathematical simulation of heating effects in a static diode-pumped vapor rubidium cell

Zhang¹,

Wang²,

Han³

et al. 2015

SPIE Proceedings

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“…Both the theoretical and the experimental studies have proved that a DPAL is now becoming one of the most promising candidates to realize an output with both good beam quality and high power [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Theoretical investigation of output features of a diode-pumped rubidium vapor laser

Wang¹,

Cai²,

Zhang³

et al. 2014

SPIE Proceedings

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In the recent years, diode-pumped alkali lasers (DPALs) have been paid many attentions because of their excellent performances. In fact, the characteristics of a DPAL strongly depend on the physical features of buffer gases. In this report, we selected a diode-pumped rubidium vapor laser (DPRVL), which is an important type among three common DPALs, to investigate how the characteristics of a DPRVL are affected by different conditions. The results signify that the population ratio of two excitation energy-levels are close to that corresponding to thermal equilibrium as the pressure of buffer gases and the temperature of a vapor cell become higher. It has been found that quenching of the upper levels cannot be simply ignored especially for the case of weak pump. The conclusions are thought to be helpful for the configuration design of an end-pumped DPAL.

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“…However, most of these studies have addressed only output performances. Although a few studies have been reported in regarding the characteristics of DPALs in time domain, the detailed analyses of relaxation oscillation (RO) generation still keep infrequent at present [18][19][20][21]. RO is a phenomenon that involves energy exchanges in the time domain between population inversion and cavity photons for optical oscillation [22].…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of relaxation oscillations in a free-running diode-pumped rubidium vapor laser

Cai¹,

Wang²,

Xue³

et al. 2014

Appl. Phys. B

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Diode-pumped alkali lasers (DPALs) have undergone rapid development to become one of the most promising candidates for use as high-power laser sources in recent years. Relaxation oscillation (RO) is a common phenomenon related to the dynamic process in the time domain. Sometimes, it is applied in parameter measurement, but sometimes it should be eliminated to ensure stable output. In this paper, we develop a kinetic model to study the RO features of a DPAL, which are different from those of a conventional solid-state laser. The results reveal that the cell temperature, buffer gas pressure, pumping power, cavity length, and reflectance of an output coupler affect the characteristics of ROs. Among these parameters, the cell temperature and the pumping power exert relatively strong influences on the waiting time of the first spike in the RO. Additionally, the cavity length cannot markedly affect the peak value of the laser intensity. These new analyses should prove useful for understanding the dynamic process of DPAL oscillation and for the future design of a steady high-powered DPAL.

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Review of alkali laser research and development

Cited by 111 publications

References 55 publications

Mathematical simulation of heating effects in a static diode-pumped vapor rubidium cell

Mathematical simulation of heating effects in a static diode-pumped vapor rubidium cell

Theoretical investigation of output features of a diode-pumped rubidium vapor laser

Theoretical study of relaxation oscillations in a free-running diode-pumped rubidium vapor laser

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