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Helen Pask on Muck Rack

Helen Pask

United Kingdom
As seen in: LincolnshireWorld, MSN UK, Nature, Grimsby Live, Optica, Louth Leader, Market Rasen Mail, Skegness Standard, The Chad, Hucknall Dispatch
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Articles

Louth star Hickman withdraws from the British Superbike Championship

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By Helen Pask
| MSN UK Verified
; ; ; Continue reading More for You
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Tunable structured laser over full spatial spectrum

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By Jia-Qi Jiang, Helen Pask, Allam Srinivasa Rao, Takashige Omatsu, Shi-jie Fu, Wei Shi, Jian-Quan Yao, Carmelo Rosales-Guzman, Zhi-Han Zhu, Jing-Ni Geng, Tian-Chang Liu, Zhen-Xu Bai, Zhi-Wei Lv
| Nature Verified
Abstract Modern tunable lasers are indispensable instruments in fundamental science and optical frequency applications. With the growing interest in structured light, there’s a need for tunable structured lasers with high transverse electromagnetic (TEM) modal purity across a broad spatial spectrum, but no commercial solutions exist. Here, we present the first tunable structured laser that can emit all possible single TEM modes with extremely high purity over a wide range.
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Investigation of intracavity MgO:LiNbO3 terahertz polariton laser gain over an extended 1–5 THz range

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By Ameera Jose, Ondrej Kitzler, Helen Pask
| Optica Verified
Most intracavity MgO:LiNbO3 terahertz polariton lasers generate output in the 1–3 THz range. In this study, we investigate the potential to extend this tuning range toward 6 THz. We predict broader tuning using a modified polariton gain theory that takes account of additional polariton damping at 3.15 THz and the angle-dependent field overlap in the crystal.
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