Dr. Xiushan Zhu Profile

Dr. Xiushan Zhu

Professor at NP Photonics, Inc.

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Author

Publications (9)

Proceedings Article | 10 March 2020 Presentation

Magneto-optical properties of diamagnetic glasses and paramagnetic glasses in the 2um region (Conference Presentation)

Masoud Mollaee, Xiushan Zhu, Pierre Lucas, Nick O'Brien, Michal Lukowski, Julien Ari, Nasser Peyghambarian

Proceedings Volume 11276, 112760Q (2020) https://doi.org/10.1117/12.2544514

KEYWORDS: Glasses, Magneto-optics, Absorption, Chalcogenide glass, Dysprosium, High power lasers, Optical isolators, Optical properties, Refractive index, Ultraviolet radiation

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Proceedings Article | 4 March 2019 Presentation + Paper

Spectral and concentration dependence of the Verdet coefficient of dysprosium doped germanate glass

David Zelmon, William Poston, John Kunkel, Masoud Mollaee, Michael Li, Jie Zong, Arturo Chavez, Xiushan Zhu

Proceedings Volume 10899, 1089910 (2019) https://doi.org/10.1117/12.2506615

KEYWORDS: Dysprosium, Glasses, Magnetism, Polarization, Bridges, Optical isolators, Terbium, Sensors, Laser systems engineering, High power lasers

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Proceedings Article | 26 February 2013 Paper

Picosecond passively mode-locked mid-infrared fiber laser

C. Wei, X. Zhu, R. Norwood, K. Kieu, N. Peyghambarian

Proceedings Volume 8601, 86011G (2013) https://doi.org/10.1117/12.2003219

KEYWORDS: Fiber lasers, Mode locking, ZBLAN, Crystals, Laser crystals, Picosecond phenomena, Mid-IR, Q switching, Continuous wave operation, Pulsed laser operation

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Mode-locked mid-infrared (mid-IR) fiber lasers are of increasing interest due to their many potential applications in spectroscopic sensors, infrared countermeasures, laser surgery, and high-efficiency pump sources for nonlinear wavelength convertors. Er³⁺-doped ZBLAN (ZrF₄-BaF₂-LaF₃-AlF₃-NaF) fiber lasers, which can emit mid-IR light at 2.65-2.9 μm through the transition from the upper energy level ⁴I_11/2 to the lower laser level ⁴I_13/2, have attracted much attention because of their broad emission range, high optical efficiency, and the ready availability of diode pump lasers at the two absorption peaks of Er³⁺ ions (975 nm and 976 nm). In recent years, significant progress on high power Er³⁺- doped ZBLAN fiber lasers has been achieved and over 20 watt cw output at 2.8 μm has been demonstrated; however, there has been little progress on ultrafast mid-IR ZBLAN fiber lasers to date. We report a passively mode-locked Er³⁺- doped ZBLAN fiber laser in which a Fe²⁺:ZnSe crystal was used as the intracavity saturable absorber. Fe²⁺:ZnSe is an ideal material for mid-IR laser pulse generation because of its large saturable absorption cross-section and small saturation energy along with the excellent opto-mechanical (damage threshold ~2 J/cm²) and physical characteristics of the crystalline ZnSe host. A 1.6 m double-clad 8 mol% Er³⁺-doped ZBLAN fiber was used in our experiment. The fiber core has a diameter of 15 μm and a numerical aperture (NA) of 0.1. The inner circular cladding has a diameter of 125 μm and an NA of 0.5. Both continuous-wave and Q-switched mode-locking pulses at 2.8 μm were obtained. Continuous-wave mode locking operation with a pulse duration of 19 ps and an average power of 51 mW were achieved when a collimated beam traversed the Fe²⁺:ZnSe crystal. When the cavity was modified to provide a focused beam at the Fe²⁺:ZnSe crystal, Q-switched mode-locked operation with a pulse duration of 60 ps and an average power of 4.6 mW was achieved. More powerful and narrower pulses are expected if the dispersion of the cavity can be properly managed.

Proceedings Article | 26 February 2013 Paper

Single-frequency, single-polarization holmium-doped ZBLAN fiber laser

X. Zhu, J. Zong, A. Miller, K. Wiersma, R. Norwood, N. Prasad, A. Chavez-Pirson, N. Peyghambarian

Proceedings Volume 8601, 86010Y (2013) https://doi.org/10.1117/12.2003214

KEYWORDS: Fiber lasers, ZBLAN, Optical fibers, Fiber Bragg gratings, Glasses, Absorption, Polarization, Photonics, Cladding, Raman spectroscopy

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Proceedings Article | 26 February 2013 Paper

Single-frequency ytterbium-doped fiber laser at 976 nm

X. Zhu, W. Shi, J. Zong, D. Nguyen, R. Norwood, A. Chavez-Pirson, N. Peyghambarian

Proceedings Volume 8601, 86010X (2013) https://doi.org/10.1117/12.2003207

KEYWORDS: Fiber lasers, Fiber Bragg gratings, Second-harmonic generation, Ytterbium, Semiconductor lasers, Signal to noise ratio, Fiber amplifiers, Wavelength division multiplexing, Polarization, Laser crystals

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Proceedings Article | 16 February 2012 Paper

Holmium-doped ZBLAN fiber lasers at 1.2 µm

X. Zhu, J. Zong, R. Norwood, A. Chavez-Person, N. Peyghambarian, N. Prasad

Proceedings Volume 8237, 823727 (2012) https://doi.org/10.1117/12.906795

KEYWORDS: ZBLAN, Fiber lasers, Glasses, Absorption, Luminescence, Holmium, Fiber amplifiers, Ions, Raman spectroscopy, Optical fibers

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Proceedings Article | 1 March 2010 Paper

Novel nonlinear transmission of porphyrin complexes containing rhenium selenide clusters

J. Wang, X. Zhu, X. Tu, Z. Zheng, R. Norwood, D. Steeves, B. Kimball, N. Peyghambarian

Proceedings Volume 7599, 759918 (2010) https://doi.org/10.1117/12.842443

KEYWORDS: Absorption, Rhenium, Metals, Molecules, Copper, Nonlinear optics, Transmittance, Chemical species, Laser damage threshold, Saturable absorption

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Proceedings Article | 1 March 2010 Paper

Nonlinear transmission using highly nonlinear Bragg mirrors

X. Zhu, J. Wang, P. Lau, D. Nguyen, R. Norwood, D. Steeves, B. Kimball, N. Peyghambarian

Proceedings Volume 7599, 759915 (2010) https://doi.org/10.1117/12.841004

KEYWORDS: Mirrors, Nonlinear optics, Oxides, Refractive index, Transition metals, Polymers, Absorption, Thin films, Optical switching, Optical limiting

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Proceedings Article | 19 February 2010 Paper

Gaussian beam shaping based on multimode interference

X. Zhu, A. Schülzgen, H. Li, J. Moloney, N. Peyghambarian

Proceedings Volume 7579, 75790M (2010) https://doi.org/10.1117/12.840981

KEYWORDS: Multimode fibers, Beam shaping, Gaussian beams, Free space, Wave propagation, Lithium, High power fiber amplifiers, Near field, Optical fibers, Far-field diffraction

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Showing 5 of 9 publications

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