Fluorescence dynamics in Tm,Ho:YLF following 800 nm pulsed laser excitation

Falconieri, M.; Lanzi, A.; Salvetti, G.; Toncelli, A.

doi:10.1007/s003400050369

Cited by 17 publications

(5 citation statements)

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“…4(b). In [48,53], K ETU was determined from luminescence-decay measurements. In [54], we determined it from the modeling of the laser performance and in [55], it was calculated theoretically.…”

Section: Energy-transfer Upconversionmentioning

confidence: 99%

Efficient Tm:LiYF₄ Lasers at ${\sim}2.3~\mu$ m: Effect of Energy-Transfer Upconversion

Loiko

Soulard

Guillemot³

et al. 2019

IEEE J. Quantum Electron.

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The 3 H 4 → 3 H 5 transition of Thulium ions (Tm 3+), which features laser emission at ~2.3 µm is studied in details. We revise the conditions for efficient laser operation using a rateequation model accounting for the ground-state bleaching, crossrelaxation and energy-transfer upconversion (ETU). We show that ETU has a crucial role in reaching more than unity pump quantum efficiency (QY) for ~2.3 µm Tm lasers based on highlydoped crystals. A Ti:Sapphire pumped quasi-continuous-wave 3.5 at.% Tm:LiYF 4 laser generated 0.73 W at 2306 nm with a record-high slope efficiency of 47.3% (versus the absorbed pump power) featuring a QY of 1.27. Diode-pumping of this crystal yielded a peak output power of >2 W. The first 2.3 µm Tm waveguide laser is also reported based on Tm:LiYF 4 epitaxial layers with even higher doping of 6.2 at.% generating 0.23 W with a slope efficiency of 19.8%. The spectroscopic properties of Tm:LiYF 4 relevant for the ~2.3 µm laser operation are revised as well.

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Section: Energy-transfer Upconversionmentioning

confidence: 99%

Efficient Tm:LiYF₄ Lasers at ${\sim}2.3~\mu$ m: Effect of Energy-Transfer Upconversion

Loiko

Soulard

Guillemot³

et al. 2019

IEEE J. Quantum Electron.

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“…High power and high efficiency 2 µm lasers are attractive for a variety of potential medical, military and scientific applications [1][2][3], including remote sensing, laser radar and mid infrared generation via pumping optical parametric oscillators [4,5]. Tm,Ho:YAP lasers with high power and high effi ciency were demonstrated in recent years [6][7][8], but they must be cooled to lower temperature suffering from more high up conversion effects and energy transferring between Tm and Ho.…”

Section: Introductionmentioning

confidence: 99%

High-power and efficiency continuous-wave operation of a-cut Ho:YAP laser at room temperature

et al. 2012

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“…Solid laser sources operating in the two μm wavelength are useful for many applications [1][2][3], such as laser lidar for remote sensing, atmospheric pollution monitoring, rangefinders, wind shear detection and medical applications. Additionally, 2-μm lasers can be applied to nonlinear optics research such as 3 -12 μm optical parametric oscillator [4,5].…”

Section: Introductionmentioning

confidence: 99%

Dual diodes end-pumped Q-switch operation of a c-cut 2044-nm Tm,Ho:YAlO₃laser

Li¹,

Yao²,

Ju³

et al. 2009

Laser Phys. Lett.

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A high efficient, Q-switch, cryogenic operation of ccut Tm (5 at.%),Ho(0.3 at.%):YAlO3 (YAP) laser was reported in this paper. In the temperature of 77 K, the Tm,Ho:YAP crystal was double end-pumped by dual 7.25-W fiber-coupled laser diodes (LDs) at the center wavelength of 793.3 nm. A 2.17-W Qswitch output power was acquired at pulse repetition frequency (PRF) of 10 kHz, corresponding to an optical-optical conversion efficiency of 15.0% and a slope efficiency of 19.4%. The energy per pulse of 1.71 mJ in 71 ns was achieved at 1.25 kHz with the peak power of 24.

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Fluorescence dynamics in Tm,Ho:YLF following 800 nm pulsed laser excitation

Cited by 17 publications

References 0 publications

Efficient Tm:LiYF₄ Lasers at ${\sim}2.3~\mu$ m: Effect of Energy-Transfer Upconversion

Efficient Tm:LiYF₄ Lasers at ${\sim}2.3~\mu$ m: Effect of Energy-Transfer Upconversion

High-power and efficiency continuous-wave operation of a-cut Ho:YAP laser at room temperature

Dual diodes end-pumped Q-switch operation of a c-cut 2044-nm Tm,Ho:YAlO₃laser

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Fluorescence dynamics in Tm,Ho:YLF following 800 nm pulsed laser excitation

Cited by 17 publications

References 0 publications

Efficient Tm:LiYF4 Lasers at ${\sim}2.3~\mu$ m: Effect of Energy-Transfer Upconversion

Efficient Tm:LiYF4 Lasers at ${\sim}2.3~\mu$ m: Effect of Energy-Transfer Upconversion

High-power and efficiency continuous-wave operation of a-cut Ho:YAP laser at room temperature

Dual diodes end-pumped Q-switch operation of a c-cut 2044-nm Tm,Ho:YAlO3laser

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Efficient Tm:LiYF₄ Lasers at ${\sim}2.3~\mu$ m: Effect of Energy-Transfer Upconversion

Efficient Tm:LiYF₄ Lasers at ${\sim}2.3~\mu$ m: Effect of Energy-Transfer Upconversion

Dual diodes end-pumped Q-switch operation of a c-cut 2044-nm Tm,Ho:YAlO₃laser