In situ non-perturbative temperature measurement in a Cs alkali laser

Shaffer, M. K.; Lilly, Taylor; Zhdanov, B. V.; Knize, R. J.

doi:10.1364/ol.40.000119

Cited by 20 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Removing the influence of both side windows as shown in Figure 2, only the wavefront aberrations induced by the heated gas medium can be obtained as shown in Figure 4(a)-(d). Then, we evaluated the temperature distributions referring to Figure 5(a)-(d) by use of Equation (12). We can see that the temperature in the center area is always lower than that at the cell edge.…”

Section: Resultsmentioning

confidence: 99%

“… can be calculated by the theory introduced in last subsection with the following formula: where is the spatial phase at the edge of a vapor cell. According to the ideal gas law and the Gladstone–Dale relation, the relationship between the temperature of the arbitrary point at the cross-section and that at the cell edge yields [12] …”

Section: Methodological Descriptionmentioning

confidence: 99%

“…According to the ideal gas law and the GladstoneDale relation, the relationship between the temperature of the arbitrary point at the cross-section and that at the cell edge yields [12] T (x, y) = T edge n edge − 1 n(x, y) − 1 .…”

Section: Evaluation Of the Temperature Distribution Inside A Vapor Cellmentioning

confidence: 99%

“…Han et al have created an analytic system by considering both laser kinetics and heat transfer [9][10][11] . Shaffer has presented a new method to measure the temperature in a Cs cell, in which the simulation process is greatly dependent on a software called as QuickFringe [12] . The experimental results of the temperature distribution at the cross-section of a sealed cell containing the alkali vapor medium have been rare so far.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental evaluation of temperature distribution of a vapor cell using a Hilbert transform procedure

Cai

Wang

Gao

et al. 2016

High Pow Laser Sci Eng

View full text Add to dashboard Cite

A diode-pumped alkali vapor laser (DPAL) is one of the most promising candidates of the next-generation high-powered laser source. As the saturated number density of alkali vapor is highly dependent on the temperature inside a vapor cell, the temperature distribution in the cross-section of a cell will greatly affect the homogeneity of a laser medium and the output characteristics of a DPAL. In this paper, we developed an algorithm based on the regime concluding quasi-Hilbert transform to evaluate the phase aberration of a wavefront when the probe beam passes through the vapor cell placed in one arm of a Mach-Zehnder interference setup. According to the theoretical algorithm, we deduced the temperature distribution of a cesium vapor cell for different heating conditions. The study is thought to be useful for development of a high-powered laser.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodological Descriptionmentioning

confidence: 99%

Section: Evaluation Of the Temperature Distribution Inside A Vapor Cellmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental evaluation of temperature distribution of a vapor cell using a Hilbert transform procedure

Cai

Wang

Gao

et al. 2016

High Pow Laser Sci Eng

View full text Add to dashboard Cite

show abstract

“…However, the thermal effects will bring about some serious problems in nonuniformity of the temperature distribution for a high-powered DPAL system because the thermal conductivity of a gas-state medium is so small that the generated heat cannot be transferred outside efficiently [6][7][8][9]. Unlike a conventional electrically-excited gas-state laser, the number densities of alkali vapors and buffer gases (generally being helium and small hydrocarbons such as methane and ethane) in a DPAL often exhibit inhomogeneous distributions resulting from the temperature gradient inside a vapor cell [10].…”

Section: Introductionmentioning

confidence: 99%

Algorithm for evaluation of temperature distribution of a vapor cell in a diode-pumped alkali laser system (part II)

Han¹,

Wang²,

Cai³

et al. 2015

Opt. Express

View full text Add to dashboard Cite

With high efficiency and small thermally-induced effects in the near-infrared wavelength region, a diode-pumped alkali laser (DPAL) is regarded as combining the major advantages of solid-state lasers and gas-state lasers and obviating their main disadvantages at the same time. Studying the temperature distribution in the cross-section of an alkali-vapor cell is critical to realize high-powered DPAL systems for both static and flowing states. In this report, a theoretical algorithm has been built to investigate the features of a flowing-gas DPAL system by uniting procedures in kinetics, heat transfer, and fluid dynamic together. The thermal features and output characteristics have been simultaneously obtained for different gas velocities. The results have demonstrated the great potential of DPALs in the extremely high-powered laser operation.

show abstract

Plasma formation in diode pumped alkali lasers sustained in Cs

Markosyan

Kushner

2016

Journal of Applied Physics

View full text Add to dashboard Cite

In diode pumped alkali lasers (DPALs), lasing action occurs on the resonant lines of alkali atoms following pumping by broadband semiconductor lasers. The goal is to convert the efficient but usually poor optical quality of inexpensive diode lasers into the high optical quality of atomic vapor lasers. Resonant excitation of alkali vapor leads to plasma formation through the excitation transfer from the 2P states to upper lying states, which then are photoionized by the pump and intracavity radiation. A first principles global model was developed to investigate the operation of the He/Cs DPAL system and the consequences of plasma formation on the efficiency of the laser. Over a range of pump powers, cell temperatures, excitation frequency, and mole fraction of the collision mixing agent (N2 or C2H6), we found that sufficient plasma formation can occur that the Cs vapor is depleted. Although N2 is not a favored collisional mixing agent due to large rates of quenching of the 2P states, we found a range of pump parameters where laser oscillation may occur. The poor performance of N2 buffered systems may be explained in part by plasma formation. We found that during the operation of the DPAL system with N2 as the collisional mixing agent, plasma formation is in excess of 1014–1015 cm−3, which can degrade laser output intensity by both depletion of the neutral vapor and electron collisional mixing of the laser levels.

show abstract

In situ non-perturbative temperature measurement in a Cs alkali laser

Cited by 20 publications

References 13 publications

Experimental evaluation of temperature distribution of a vapor cell using a Hilbert transform procedure

Experimental evaluation of temperature distribution of a vapor cell using a Hilbert transform procedure

Algorithm for evaluation of temperature distribution of a vapor cell in a diode-pumped alkali laser system (part II)

Plasma formation in diode pumped alkali lasers sustained in Cs

Contact Info

Product

Resources

About