A Model of Lasing Action in a Quasi-Four-Level Thin Active Media

Toroghi, Seyfollah; Jafari, Ahmad Khayat; Golpayegani, A. H.

doi:10.1109/jqe.2010.2040368

IEEE J. Quantum Electron.

2010

DOI: 10.1109/jqe.2010.2040368

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A Model of Lasing Action in a Quasi-Four-Level Thin Active Media

Seyfollah Toroghi

Ahmad Khayat Jafari

A. H. Golpayegani

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Cited by 8 publications

(1 citation statement)

References 21 publications

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“…Parameters used in the simulation are listed in Table 2. [19] Convective heat transfer coefficient (K heat ) 10 W/(m 2 •K) [20] Radiative quantum efficiency of 3 F 4 state (η 3F4 R ) 0.98 [21] Temperature of coolant fluid (T cool ) 292 K…”

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confidence: 99%

Up conversion and excited state absorption analysis in the Tm:YAG disk laser multi-pass pumped by 1 μm laser

Song

Zhu

Wang

et al. 2021

High Pow Laser Sci Eng

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We present a 2 μm Tm:YAG disk laser multi-pass pumped by a 1 μm laser. The transitions in competition of up conversion (UC) and excited state absorption (ESA) are analyzed in detail based on a numerical model that considers stimulated emission, fluorescence, non-radiative decay, UC, andESA, showing good agreement with experiments. The proportions and fractional thermal loads of all transitions are derived quantitatively. The results show that UC and ESA are critical in Tm:YAG disk lasers, resulting in a decrease in the absorbed pump power and temperature after lasing for two different disk thicknesses. In addition, although the absorbed pump power of the 0.5 mm disk is lower than in the 1 mm case, its relatively weak UC and ESA and low total fractional thermal load can improve laser performance. A 0.5 mm Tm:YAG disk laser thus delivered the maximum output power of1.05 W with beam quality of Mx2 = 2.02 and My2 = 2.03.

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mentioning

confidence: 99%

Up conversion and excited state absorption analysis in the Tm:YAG disk laser multi-pass pumped by 1 μm laser

Song

Zhu

Wang

et al. 2021

High Pow Laser Sci Eng

View full text Add to dashboard Cite

show abstract

High stability static/dynamic gain in phototransistors for high speed digital optical fiber telecommunication systems based on various modulation code schemes

Paramasivam,

Balashanmugam,

Rajendran

et al. 2024

J Opt

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On the numerical modelling of a 6-energy-level optical gain system

Zhang

et al. 2021

Optik

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A Model of Lasing Action in a Quasi-Four-Level Thin Active Media

Cited by 8 publications

References 21 publications

Up conversion and excited state absorption analysis in the Tm:YAG disk laser multi-pass pumped by 1 μm laser

Up conversion and excited state absorption analysis in the Tm:YAG disk laser multi-pass pumped by 1 μm laser

High stability static/dynamic gain in phototransistors for high speed digital optical fiber telecommunication systems based on various modulation code schemes

On the numerical modelling of a 6-energy-level optical gain system

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