Algorithm for evaluation of temperature distribution of a vapor cell in a diode-pumped alkali laser system: part I

Abstract

A diode-pumped alkali laser (DPAL) is one of the most hopeful candidates to achieve high power performances. As the laser medium is in a gas-state, populations of energy-levels of a DPAL are strongly dependent on the vapor temperature. Thus, the temperature distribution directly determines the output characteristics of a DPAL. In this report, we developed a systematic model by combining the procedures of heat transfer and laser kinetics together to explore the radial temperature distribution in the transverse section of a cesium vapor cell. A cyclic iterative approach is adopted to calculate the population densities. The corresponding temperature distributions have been obtained for different beam waists and pump powers. The conclusion is thought to be useful for realizing a DPAL with high output power.

Investigation of a new kind of gas-flowing diode pumped cesium laser

“…In this study, we calculate the temperature distribution and velocity distribution at the transverse section of a vapor cell using the similar theory as our previous paper [3,19,20], in which the input parameters of the simulation model are temperature, rotate speed, pump power, and waist radius of a pump beam, etc. The output parameters conclude temperature distribution, velocity distribution, and laser corresponded parameters (such as output power, generate heat, and population density distribution, etc.…”

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

“…Based on the kinetic evaluation, Barmashenko et temperature distribution by assuming the temperature is a constant inside the lasing region [8] . 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] .…”

“…Han et al. have created an analytic system by considering both laser kinetics and heat transfer [9–11] . 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] .…”

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

“…Actually, the inhomogeneous of the alkali vapor directly influences the output performances of a DPAL. Furthermore, the nonuniformity of buffer gases affects the line-center cross sections of both the D 1 line (n 2 P 1/2 → n 2 S 1/2 ) and the D 2 line (n 2 S 1/2 → n 2 P 3/2 ) of an alkali atom as well as the rapid rate of fine-structure mixing (n 2 P 3/2 → n 2 P 1/2 ) [11].…”

“…Generally, flowing the gaseous medium in an enclosed system is thought as an effective way to reduce the thermally-induced effects of a DPAL configuration [12]. In our previous study, a systematic model is constructed to explore the radial temperature distribution in the transverse section of a cesium vapor cell with static state [11]. In this report, we improve our theoretical model by uniting the laser kinetics, fluid dynamic, and heat transfer procedures together to analyze the features of a flowing-gas Cs-DPAL system.…”