Xiaozhao Song

Jiangsu Normal University

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CCDC 975882: Experimental Crystal Structure Determination

The Cambridge Structural Database (2014)

Q. Liu Xiaozhao Song H. Yan

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Crystal (programming language)

10.5517/cc11rh2c

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Observation of 2 µm multiple annular structured vortex pulsed beams by cavity-mode tailoring

Optics Letters (2024)

Qiang Zhu Xiaozhao Song Luyao Li Hui Kang Tianchen Yao

In the past few years, annular structured beams have been extensively studied due to their unique “doughnut” structure and characteristics such as phase and polarization vortices. Especially in the 2 µm wavelength range, they have shown promising applications in fields such as novel laser communication, optical processing, and quantum information processing. In this Letter, we observed basis vector patterns with orthogonality and completeness by finely cavity-mode tailoring with end-mirror space position in a Tm:CaYAlO 4 laser. Multiple annular structured beams including azimuthally, linearly, and radially polarized beams (APB, LPB, and RPB) operated at a Q -switched mode-locking (QML) state with a typical output power of ∼18 mW around 1962 nm. Further numerical simulation proved that the multiple annular structured beams are the coherent superposition of different Hermitian Gaussian modes. Using a self-made M–Z interferometer, we have demonstrated that the obtained multiple annular beams have a vortex phase with orbital angular momentum (OAM) of l = ±1. To the best of our knowledge, this is the first observation of vector and scalar annular vortex beams in the 2 µm solid-state laser.

Optical vortex

10.1364/ol.524370

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Soliton patterns recognition and searching from a 2 µm intelligent mode-locked fiber laser agent

Optics & Laser Technology (2024)

Tianchen Yao Liwen Qi Fangfang Zheng Wei Zhou Hui Kang

Mode (computer interface)

10.1016/j.optlastec.2024.112125

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2 µm cylindrical vector beam generation from a c-cut Tm:CaYAlO₄ crystal resonator

Optics Express (2023)

Yangyu Liu Luyao Li Xiaozhao Song Wei Zhou Qiang Zhu

Different from the traditional ideal column symmetry cavities, we directly generated the cylindrical vector pulsed beams in the folded six-mirror cavity by employing a c-cut Tm:CaYAlO4 (Tm:CYA) crystal and SESAM. By adjusting the distance between the curved cavity mirror (M4) and the SESAM, both the radially polarized beam and azimuthally polarized beam are generated around 1962 nm and the two vectorial modes can be freely switched in the resonator. Further increased the pump power to 7 W, the stable radially polarized Q-switched mode-locked (QML) cylindrical vector beams were also obtained with an output power of 55 mW, the sub-pulse repetition rate of 120.42 MHz, pulse duration of ∼0.5 ns and the beam quality factor M2 of ∼2.9. To our knowledge, this is the first report of radially and azimuthally polarized beams in the 2 µm wavelength solid-state resonator.

Crystal (programming language)

10.1364/oe.484875

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Citations (5)