2-micron lasing in Tm:Lu2O3 ceramic: initial operation

Vetrovec, John; Filgas, David M.; Smith, Carey A.; Copeland, Drew A.; Litt, Amardeep S.; Briscoe, E.; Schirmer, Ernestina

doi:10.1117/12.2291380

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…For better turnabilities in wavelength, ceramic is preferred as the host material. With Tm:Lu2O3 ceramic, a wide tuning range of 1890 -2120 nm with CW output was achieved [22], and a conceptual design for pulsed output up to 370 J energy was suggested [23]. In summary, laser technologies for the wavelength ranges l ~ 1.4 -1.5 µm and l ~ 2.0 -2.3 µm to date have higher maturity levels than those at other wavelengths for pumping ultra-high-power LWIR lasers and amplifiers.…”

Section: Direct Optical Pumpingmentioning

confidence: 99%

Optical pumping for high-power ultrashort LWIR gas lasers

Chen,

Hasson,

Gordon

et al. 2024

High-Power Laser Ablation VIII

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Long-wave infrared (LWIR) lasers based on high-voltage pulsed discharges in the high-pressure CO2 gas have reached multi-TW peak power. As optical pumping appears to be a more viable pathway toward ultrahigh power and high repetition rate, we investigated multiple apparatus including direct and indirect optical pumping. Indirect optical pumping through stimulated Raman scattering in N2 gas could be efficient, and is relatively insensitive to the pump wavelength. On the other hand, laser technologies for direct optical pumping have higher maturity levels at wavelengths of ~ 1.4 µm and ~ 2.0 µm among multiple excitation bands in the mid-IR wavelength.

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Section: Direct Optical Pumpingmentioning

confidence: 99%

Optical pumping for high-power ultrashort LWIR gas lasers

Chen,

Hasson,

Gordon

et al. 2024

High-Power Laser Ablation VIII

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“…But the huge wavelength difference between the pump laser and emission laser will result in a severe quantum defect, which further leads to a serious thermal effect inside the Tm 3+ -doped laser crystal. 5) Moreover, other non-lasing effects including non-radiative relaxation, 6) concentration quenching, 7) excited state absorption 8) as well as up conversion, 9) which typically exist in a quasi-three energy level, also together aggravate the thermal effect. The thermal effect leads to a non-homogeneous temperature gradient distribution inside the Tm 3+ -doped laser crystal, and further results in a transverse gradient change of the refractive index, 10,11) i.e.…”

mentioning

confidence: 99%

The interferometric measurement of thermal lens effect in an LD pumped Tm-doped bulk laser

Zhao¹,

Zhao²,

Li³

et al. 2021

Appl. Phys. Express

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Directly measuring thermal focal length is important for designing and optimizing the mode locking oscillator, especially for a 2-μm mode-locking laser. In this paper, we propose a novel interferometric method for measuring the thermal focal length in a 2-μm mode-locking laser. This method could give a precise measurement of the thermal focal length inside a long-folded oscillator in both lasing and non-lasing operation. We also theoretically calculate the thermal focal length based on the temperature distribution inside the laser crystal, which matches well with the experimental result

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