Optical Crystals for 1.3 μm All-Solid-State Passively Q-Switched Laser

Shen, Yanxin; Fu, Xiquan; Ye, Cong; Li, Wenyuan; Wang, Yubin; Zhao, Xinrui; Fu, Xihong

doi:10.3390/cryst12081060

Cited by 11 publications

(3 citation statements)

References 134 publications

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“…Passive Q-switched is one type of Q-switched techniques that were used to compress the laser energy to a narrow pulse to improve the power of the output laser pulses [1,2] . It relies on optical element called saturable absorber material (SA).…”

Section: Introductionmentioning

confidence: 99%

Effect of Saturable Absorber Length on Characteristics of Dual Laser Pulses of Passive Q-Switched

A.Shadood,

Abdul-Kareem Mahdi Salih,

Asal

2024

UTJsci

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The effect of saturable absorber material length on the characteristics of the dual passive Q-switching pulses generated from two wavelengths ( and ) instead of single wavelength was simulated. Numerical solution of our previous rate equations model using Rung-Kutta-Fahelberg method has been utilized in simulation. Nd+3 :YAG using as an active medium, and Cr+4:YAG as a saturable absorber material. The results showed that the Nd+3:YAG dual passive Q-switching generated or released at an advanced(earlier) time and characterized by short duration times, high energy and high power with the increasing in the value of . The passive Q-switching for , are released respectively at time 58ns, 60 ns approximately at , while released at time 34 ns, 36 ns respectively approximately at . The duration time of , pulses approximate to 16.8ns, 14.6 ns respectively at , while approximate to 10.8 ns ,9.2 ns respectively at .

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Section: Introductionmentioning

confidence: 99%

Effect of Saturable Absorber Length on Characteristics of Dual Laser Pulses of Passive Q-Switched

A.Shadood,

Abdul-Kareem Mahdi Salih,

Asal

2024

UTJsci

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“…As a result, it becomes challenging to produce large crystals with high-quality doping. Consequently, researchers have focused on exploring novel crystal materials with potential for ∼1 μm lasers, garnering significant attention. − …”

Section: Introductionmentioning

confidence: 99%

Trivalent Neodymium-Doped Double Molybdate/Tungstate Composite Laser Crystals

Ding,

Hu,

Zou

et al. 2023

Crystal Growth & Design

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The use of inhomogeneous broadening in composite disordered crystals has been widely recognized as a successful approach to enhancing the spectral bandwidth of rare-earth ions in optical spectra. In this study, composite disordered laser crystals of rare-earth alkali metal double molybdate/tungstate, doped with 2 atom % Nd 3+ and represented by the general formula Nd:NaGd-(Mo x W 1−x O 4 ) 2 (x = 0.5, 0.7 and 0.9), were grown using the Czochralski method. The crystal structure of the disordered laser crystals was determined to be of the tetragonal phase with a space group of I4 1 /a, as confirmed through X-ray diffraction (XRD) and Rietveld refinement analyses. The spectroscopic properties of the disordered laser crystal, encompassing absorption, emission, and fluorescence decay characteristics were investigated. The (MoO 4 ) 1.0 (WO 4 ) 1.0 composite crystal exhibited an exceptionally broad absorption bandwidth, with a full width at half-maximum (FWHM) of 21 at 808 nm, approximately 10 times wider than that of the well-known Nd:YAG crystal. Moreover, the composite crystal demonstrated the generation of a continuous-wave 1.06 μm laser, which was further frequency-doubled to produce a 532 nm laser. Additionally, the passively Q-switched laser behavior of the composite crystal at 1.06 μm was explored, utilizing tungsten disulfide as a saturable absorber. In summary, the double molybdate/tungstate composite disordered crystal exhibits advantageous characteristics, such as a low melting point (approximately 1200 °C), stable physical−chemical properties, and remarkable spectroscopic properties. These features highlight the potential applications of these composite crystals in all solid-state lasers. Highquality Nd-doped double molybdate/tungstate composite disordered laser crystals were grown by the Czochralski method. By implementing a composite engineering strategy, an exceptionally inhomogeneous spectral broadening with an fwhm of up to 21 at 808 nm was achieved.

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“…Usually, Nd-doped materials present stimulated emission only at 1064 nm ( 4 F 3/2 → 4 I 11/2 ), but in certain conditions, 1.3 µm emission ( 4 F 3/2 → 4 I 13/2 ) also happens [ 19 ]. Since the emission cross-section of the 1064 nm emission is always larger, it is necessary to suppress it to be able to effectively detect the 1.3 µm emission.…”

Section: Introductionmentioning

confidence: 99%

1337 nm Emission of a Nd3+-Doped TZA Glass Random Laser

Dipold

Bordon²,

Magalhães

et al. 2023

Nanomaterials

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Random lasers have been studied using many materials, but only a couple have used glass matrices. Here, we present a study of zinc tellurite and aluminum oxide doped with different percentages of neodymium oxide (4 wt.%, 8 wt.%, and 16 wt.%) and demonstrate for the first time random laser action at 1337 nm. Laser emission was verified and the laser pulse’s rise time and input–output power slope were obtained. A cavity composed of the sample’s pump surface and an effective mirror formed by a second, parallel layer at the gain-loss boundary was probably the main lasing mechanism of this random laser system. The reason for the absence of emission at 1064 nm is thought to be a measured temperature rise in the samples’ active volume.

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Optical Crystals for 1.3 μm All-Solid-State Passively Q-Switched Laser

Cited by 11 publications

References 134 publications

Effect of Saturable Absorber Length on Characteristics of Dual Laser Pulses of Passive Q-Switched

Effect of Saturable Absorber Length on Characteristics of Dual Laser Pulses of Passive Q-Switched

Trivalent Neodymium-Doped Double Molybdate/Tungstate Composite Laser Crystals

1337 nm Emission of a Nd3+-Doped TZA Glass Random Laser

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