Ho:YAG laser at 2097 nm pumped by a narrow linewidth tunable 1.91 μm laser

Tian, Juntao; Zhao, Lili; Li, Zhiyong; Bian, Jintian; Ye, Qing; Wang, Hai; Tan, Rongqing

doi:10.1038/s41598-023-27970-0

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…These lasers find wide applications in fields like electro-optics and countermeasures. Currently, there are two methods to achieve 1907 nm laser output: Tm: YLF crystal [6] or thulium-doped fiber [7] as the gain medium. Compared to traditional Tm: YLF lasers, the thulium-doped fiber lasers have higher output power, efficiency, and superior beam quality.…”

Section: Introductionmentioning

confidence: 99%

Dual-path 1907nm high-power thulium-doped fiber laser

He,

Yu,

Ren

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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We developed a high-power thulium-doped fiber laser at 1907 nm with a dual-path configuration. The laser comprises a low-power seed oscillator and dual-path master oscillator power amplifiers (MOPAs). The laser has a central wavelength of 1907.4 nm and a 3 dB linewidth of 0.16 nm, with a maximum output power. Under full power conditions, the laser achieved an average output power of 154 W and 152 W. The dual-path amplifiers have a slope efficiency of 56 % and 55.2 %. The beam quality M 2 factor is about 1.5, which is recorded at the maximum operating power.

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Section: Introductionmentioning

confidence: 99%

Dual-path 1907nm high-power thulium-doped fiber laser

He,

Yu,

Ren

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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“…Since the Ho 3+ ion has no absorption band around 800 nm to utilize the commercialized AlGaAs diode lasers (LDs), initial studies on Ho lasers mainly used the Tm, Ho-codoped crystals for diode pumping − or the single Ho ion-doped crystals for in-band pumping. − However, liquid nitrogen cooling was required for achieving efficient laser operation in the Tm, Ho-codoped crystals due to severe cooperative up-conversion processes, mainly 3 H 4 (Tm 3+ ) + 5 I 8 (Ho 3+ ) → 3 H 6 (Tm 3+ ) + 5 I 5 (Ho 3+ ) and 3 F 4 (Tm 3+ ) + 5 I 7 (Ho 3+ ) → 3 H 6 (Tm 3+ ) + 5 I 5 (Ho 3+ ), which limits the accessibility of these gain media for a compact 2.1 μm laser at room temperatures. As for the Ho-ion doped crystals, additional 1.9 μm Tm lasers are required for cascaded pumping; this leads to a complex and bulky Ho laser system.…”

Section: Introductionmentioning

confidence: 99%

Design and Integration of Vanadate Crystal-Based Tm and Ho Ion-Doped Gain Media for a Miniature Diode-Pumped 2.1 μm Laser

Deng,

Huang,

Liu

et al. 2023

Crystal Growth & Design

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We propose a vanadate crystal-based composite gain medium consisting of Tm 3+ and Ho 3+ ion-doped sections, which facilitates the direct use of common 800 nm diode lasers for a miniature 2.1 μm laser oscillator, owing to the large absorption cross sections and broad absorption bands of the rare earth iondoped vanadate crystals. Moreover, due to heat transfer and the released thermal stress at the interface between the boned Tm:YVO 4 and Ho:YVO 4 sections, significant improvement in the thermal effects of the gain structure is realized, and an efficient Ho laser with a power of 3.62 W at 2053.13 nm is obtained, corresponding to a slope efficiency of 28.6%. To the best of our knowledge, this is the maximum room-temperature power of common diode-pumped vanadate gain media with a wavelength of above 2 μm.

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“…In recent decades, near-infrared (NIR) at 1.9–2.1 μm and mid-infrared (MIR) lasers at 2.7–3.0 μm wavelength bands have been the focus of attention for researchers in various countries, due to their promising applications in many fields, such as environmental, military, biological, medical, and fundamental research. − Especially, it has great advantages in the aspect of ultra-short pulse and tunable lasers. − Using rare-earth ion-doped solid-state lasers is the traditional method for achieving MIR laser output, where Ho 3+ is often chosen as an activating ion because it can simultaneously obtain ∼2.1 ( 5 I 7 → 5 I 8 ) and ∼2.9 ( 5 I 6 → 5 I 7 ) μm emissions …”

Section: Introductionmentioning

confidence: 99%

Growth, Thermal, and Optical Properties of a Novel Mid-Infrared Ho:LuYAP Laser Crystal

Qiao

Sun

Zhang

et al. 2023

Crystal Growth & Design

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A novel mid-infrared Ho:Lu 0.1 Y 0.9 AlO 3 laser crystal with a size of Φ26 mm × 80 mm was grown successfully by the Czochralski method. The crystal structure was characterized in detail by powder and single-crystal X-ray diffractions: Pnma (62) space group, a = 5.3234 Å, b = 7.3517 Å, c = 5.1670 Å, V = 202.22 Å 3 , and Z = 1. The X-ray rocking curves show that the crystal possesses high crystalline quality. It was observed by a transmission electron microscope that all atoms are neatly arranged and all elements are uniformly distributed. Meanwhile, the refractive index curves from 400 to 3000 nm at three crystalline axes and Mohs hardness were also achieved. The thermal expansion coefficient is 4.382 × 10 −6 K −1 , and thermal conductivity is 5.872 W•m −1 •K −1 . Particularly, the maximum phonon energy is only 552 cm −1 , as exhibited by the Raman spectrum. Finally, the transmission, fluorescence spectra, and level lifetimes were measured and compared, which provided a basis for subsequent spectral theoretical analysis and laser experiment.

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Ho:YAG laser at 2097 nm pumped by a narrow linewidth tunable 1.91 μm laser

Cited by 9 publications

References 13 publications

Dual-path 1907nm high-power thulium-doped fiber laser

Dual-path 1907nm high-power thulium-doped fiber laser

Design and Integration of Vanadate Crystal-Based Tm and Ho Ion-Doped Gain Media for a Miniature Diode-Pumped 2.1 μm Laser

Growth, Thermal, and Optical Properties of a Novel Mid-Infrared Ho:LuYAP Laser Crystal

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