Dr. Jun Zhang Profile

Dr. Jun Zhang

Physicist at DEVCOM Army Research Lab

SPIE Involvement:

Conference Program Committee | Author

Proceedings Article | 4 March 2022 Presentation + Paper

First demonstration of dispersion-shifted LMA silica fiber in a high-power 1.6-um laser

Charles Yu, Victor Khitrove, Paul Pax, Cody Mart, Mike Runkle, Mike Messerly, Jay Dawson, Jun Zhang, Mark Dubinskii

Proceedings Volume 11981, 119810S (2022) https://doi.org/10.1117/12.2608370

KEYWORDS: Raman spectroscopy, Fiber lasers, Fiber amplifiers, Dispersion, Optical fibers, Optical amplifiers, Modulation, Erbium, Multimode fibers, Diodes

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Proceedings Article | 5 March 2021 Presentation

Compact eye-safe pulsed hybrid (fiber-bulk) MOPA based on Er-doped gain media

Jun Zhang, Radha Pattnaik, Viktor Fromzel, Nikolay Ter-Gabrielyan, Colin Baker, E. Joseph Friebele, Jasbinder Sanghera, Mark Dubinskii

Proceedings Volume 11682, 116820O (2021) https://doi.org/10.1117/12.2588457

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Proceedings Article | 14 May 2019 Presentation

A power scaled diode cladding pumped 2.8 µm Er:ZBLAN fiber laser (Conference Presentation)

G. Alex Newburgh, Mark Dubinskii, Jun Zhang, Wei Lu

Proceedings Volume 10981, 1098107 (2019) https://doi.org/10.1117/12.2522816

KEYWORDS: Fiber lasers, Diodes, Cladding, Semiconductor lasers, Laser development, Quantum efficiency, Surgery, Laser applications, Environmental sensing, Defense and security

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Proceedings Article | 14 March 2018 Presentation

Power scaling of the in-band diode-pumped Er-nanoparticle-doped fiber laser (Conference Presentation)

Jun Zhang, Radha Pattnaik, Mark Dubinskii, Colin Baker, E. Joseph Friebele, Ashley Burdett, Woohong Kim, Jasbinder Sanghera

Proceedings Volume 10528, 1052803 (2018) https://doi.org/10.1117/12.2296922

KEYWORDS: Fiber lasers, Erbium, Doping, Nanoparticles, Fabrication, Absorption, Upconversion

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Proceedings Article | 14 March 2018 Presentation

Yb-Er co-doping for resonantly pumped fiber lasers at eye-safer wavelengths (Conference Presentation)

Colin Baker, E. Joseph Friebele, Ashley Burdett, Daniel Rhonehouse, Woohong Kim, Jasbinder Sanghera, Jun Zhang, Radha Pattnaik, Mark Dubinskii

Proceedings Volume 10528, 1052807 (2018) https://doi.org/10.1117/12.2296604

KEYWORDS: Fiber lasers, Erbium, Eye, Ions, Doping, Nanoparticles, Ytterbium, Erbium lasers, Laser applications, Laser safety

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Proceedings Article | 22 February 2018 Presentation + Paper

Comparison of Tm-doped fiber laser performance as diode pumped at 800 nm and 1620 nm

G. A. Newburgh, J. Zhang, M. Dubinskii

Proceedings Volume 10528, 1052808 (2018) https://doi.org/10.1117/12.2296589

KEYWORDS: Fiber lasers, Thulium, Diodes, Quantum efficiency, Semiconductor lasers, Aspheric lenses, Optical fibers, Fiber couplers, Electrons, Fiber coupled lasers

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Proceedings Article | 19 September 2017 Presentation

Highly efficient cladding-pumped double-clad fiber laser based on a concentrically co-grown Yb:YAG/YAG crystal structure (Conference Presentation)

Jun Zhang, Youming Chen, Shizhuo Yin, Claire Luo, Mark Dubinskii

Proceedings Volume 10382, 103820O (2017) https://doi.org/10.1117/12.2277079

KEYWORDS: Crystals, Liquid phase epitaxy, Fiber lasers, Laser crystals, Liquids, Photonic crystal fibers, Optical fibers, High power lasers, Optical fabrication, Fabrication

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Proceedings Article | 21 April 2017 Presentation

Clad-pumped Er-nanoparticle-doped fiber laser (Conference Presentation)

Colin Baker, E. Joseph Friebele, Daniel Rhonehouse, Barbara Marcheschi, John Peele, Woohong Kim, Jasbinder Sanghera, Jun Zhang, Youming Chen, Radha Pattnaik, Mark Dubinskii

Proceedings Volume 10083, 100831P (2017) https://doi.org/10.1117/12.2256594

KEYWORDS: Erbium, Fiber lasers, Nanoparticles, Cladding, Absorption, Ions, Directed energy weapons, Upconversion, Doping, Aluminum

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Proceedings Article | 16 March 2016 Paper

Nanoparticle doping for improved Er-doped fiber lasers

Colin Baker, E. Joseph Friebele, Charles Askins, Michael Hunt, Barbara Marcheschi, Jake Fontana, John Peele, Woohong Kim, Jasbinder Sanghera, Jun Zhang, Radha Pattnaik, Larry Merkle, Mark Dubinskii, Youming Chen, Iyad Dajani, Cody Mart

Proceedings Volume 9728, 97280T (2016) https://doi.org/10.1117/12.2217905

KEYWORDS: Erbium, Doping, Fiber lasers, Aluminum, Nanoparticles, Ions, Absorption, Silica, Luminescence, Refractive index

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Proceedings Article | 16 March 2015 Paper

Raman gain of SiC as a potential medium for Raman lasers

Larry Merkle, Jun Zhang, Graham Allen, Jay Dawson, Mark Dubinskii

Proceedings Volume 9359, 935904 (2015) https://doi.org/10.1117/12.2077299

KEYWORDS: Raman spectroscopy, Silicon carbide, Raman scattering, Crystals, Laser crystals, Laser beam diagnostics, Laser damage threshold, Beam propagation method, Polarization, Light scattering

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Proceedings Article | 4 March 2015 Paper

Erbium nanoparticle doped fibers for efficient, resonantly-pumped Er-doped fiber lasers

E. Joseph Friebele, Colin Baker, Charles Askins, Jake Fontana, Michael Hunt, John Peele, Barbara Marcheschi, Euneku Oh, Woohong Kim, Jasbinder Sanghera, Jun Zhang, Radha Pattnaik, Larry Merkle, Mark Dubinskii

Proceedings Volume 9344, 934412 (2015) https://doi.org/10.1117/12.2079443

KEYWORDS: Erbium, Optical fibers, Aluminum, Ions, Neptunium, Silica, Fiber lasers, Refractive index, Doping, Nanoparticles

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Proceedings Article | 10 September 2014 Paper

Synthesis of high purity metal oxide nanoparticles for optical applications

C. Baker, W. Kim, E. Friebele, G. Villalobos, J. Frantz, L. Shaw, B. Sadowski, J. Fontana, M. Dubinskii, J. Zhang, J. Sanghera

Proceedings Volume 9161, 91610D (2014) https://doi.org/10.1117/12.2061082

KEYWORDS: Nanoparticles, Ceramics, Oxygen, Oxides, Spinel, Metals, Fiber lasers, Doping, Particles, Transmittance

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Proceedings Article | 13 May 2009 Paper

Power scaling of resonantly pumped Yb-free Er-doped fiber laser

M. Dubinskii, J. Zhang, V. Ter-Mikirtychev

Proceedings Volume 7325, 73250A (2009) https://doi.org/10.1117/12.820802

KEYWORDS: Fiber lasers, Quantum efficiency, Fiber amplifiers, Erbium, Energy transfer, Ytterbium, Semiconductor lasers, Fiber Bragg gratings, Eye, Safety

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Even though Yb-doped fiber lasers are known to be the most powerful and most efficient among all fiber lasers, recent successes in the eye-safe ~1.5μm Yb-Er-doped fiber lasers (where Er is excited through Yb-Er energy transfer) are quite impressive. Output power of Yb-Er fiber lasers reached ~300 W level and their optical-to-optical efficiency, for somewhat lower power levels, is exceeding 40% [2]. Nevertheless, as far as real eye safety is concerned, multi-hundred Watt Yb-Er fiber lasers typically carry in their output a significant fraction of competing 1-μm Yb emission, which totally compromises an eye-safe side of the application. Ultimate efficiency and thermal management of Yb-Er approach are also suffering due to: (i), inefficiency of Yb-Er energy transfer and, (ii), gigantic ~40% quantum defect of Er-doped fiber pumped at 9XX-nm. Presented here are very recent and successful results on power scaling of resonantly pumped Yb-free Er-doped fiber lasers and amplifiers. We are reporting an Ybfree Er-doped cladding-pumped fiber power scaling to ~50 W with ~57% optical-tooptical efficiency [6] in a few first experimental steps. This is clear manifestation of scaling potential of this most efficient approach to high power eye-safe fiber laser. The only competing approach to scalable eye-safe fiber laser implements Tm³⁺-doped fibers pumped at ~790 nm while relying on well known "2-for-1" process leading to quite efficient excitation of the ~2μm Tm³⁺ laser operation [4]. This approach has operational optical-to-optical efficiency quantum limit of ~75% [4], while resonantly pumped Ybfree Er-doped fiber laser's optical-to-optical efficiency quantum limit exceeds 95% due to its low-quantum-defect (QD) pump-lase scheme. Significant scaling potential of resonantly-pumped Yb-free Er-doped fiber lasers and amplifiers sets a path to an eye-safe fiber laser concept with drastically relaxed thermal management and nearly diffraction limited beam quality at ~kW-=-class power levels as well as high electrical to optical efficiency.

Proceedings Article | 28 April 2008 Paper

Yb-free, SLM EDFA: comparison of 980-, 1470- and 1530-nm excitation for the core- and clad-pumping

M. Dubinskii, V. Ter-Mikirtychev, J. Zhang, I. Kudryashov

Proceedings Volume 6952, 695205 (2008) https://doi.org/10.1117/12.782760

KEYWORDS: Fiber lasers, Fiber amplifiers, Optical amplifiers, Semiconductor lasers, Erbium, Fiber coupled lasers, Diodes, Fiber couplers, Spatial light modulators, Commercial off the shelf technology

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Showing 5 of 14 publications

Conference Committee Involvement (15)

Optical Components and Materials XXII

25 January 2025 | San Francisco, California, United States

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVIII

18 August 2024 | San Diego, California, United States

Optical Components and Materials XXI

29 January 2024 | San Francisco, California, United States

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII

20 August 2023 | San Diego, California, United States

Optical Components and Materials XX

30 January 2023 | San Francisco, California, United States

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVI

21 August 2022 | San Diego, California, United States

Optical Components and Materials XIX

24 January 2022 | San Francisco, California, United States

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XV

2 August 2021 | San Diego, California, United States

Optical Components and Materials XVIII

6 March 2021 | Online Only, California, United States

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XIV

24 August 2020 | Online Only, California, United States

Optical Components and Materials XVII

4 February 2020 | San Francisco, California, United States

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XIII

11 August 2019 | San Diego, California, United States

Optical Components and Materials XVI

4 February 2019 | San Francisco, California, United States

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XII

19 August 2018 | San Diego, California, United States

Optical Components and Materials XV

29 January 2018 | San Francisco, California, United States

Showing 5 of 15 Conference Committees

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