Dr. Colin David McMillen Profile

Dr. Colin David McMillen

at Clemson Univ

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Publications (7)

Proceedings Article | 13 March 2024 Presentation

Growth of single crystal fibers of doped lutetia for laser applications

Allen Benton, Rylan Terry, Colin McMillen, Joseph Kolis

Proceedings Volume PC12864, PC128640F (2024) https://doi.org/10.1117/12.3001086

KEYWORDS: Crystals, Laser crystals, Laser applications, Ytterbium, YAG lasers, Fiber lasers, Crystal optics, Scanning electron microscopy, Refractive index, Raman scattering

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Proceedings Article | 4 March 2019 Presentation

Single crystals of borates for deep UV nonlinear optics (Conference Presentation)

Joseph Kolis, Colin McMillen, Henry Giesber

Proceedings Volume 10902, 1090202 (2019) https://doi.org/10.1117/12.2514740

KEYWORDS: Crystals, Nonlinear crystals, Deep ultraviolet, Nonlinear optics, Crystal optics, Optical properties, Polishing, Laser vision correction, Laser applications, Laser metrology

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All-solid-state deep UV lasers (266nm and shorter) have many potential applications including metrology, LIBS, imaging, chem/bio standoff detection, ARPES spectroscopy, and laser surgery. There are few suitable direct laser emission lines at such short wavelengths, making the use of frequency generation by harmonic generation an important tool for UV solid state laser development. The primary limitation of the field is the development of suitable single crystals for nonlinear frequency conversion. The materials must be acentric, have bandgaps substantially wider than the desired conversion line and and be capable of phase matching to these short wavelengths. Several borate crystals have been reported as possible candidates for deep UV nonlinear applications. These include compounds with the formula ABBF (ABe2BO3F2) where A = K, Rb or Cs, and SBBO (Sr2Be2B2O7). Both compounds have very attractive properties for deep UV nonlinear applications including acentric crystal structures, wide band edges, moderate birefringence and reasonable nonlinear coefficients. Both classes are difficult to crystallize and process however. They have two dimensional structures making them somewhat soft, difficult to cut and polish at a critical angle, and making them prone to disorder. The ABBF phases have very attractive optical properties with wide bandgaps and are capable of frequency conversion to 175nm. They are extremely difficult to grow as single crystals however and are extremely soft and difficult to process. To date these are debilitating limitations. The SBBO crystals appear to have nearly as attractive properties with somewhat less of a bandgap than KBBF, but appear to have greater NLO coefficients. They are considerably harder than KBBF but are prone to severe disorder. Recently the application of hydrothermal methods led to the crystal growth of both of these classes of compounds. The hydrothermal growth of KBBF and RBBF led to formation of large single crystals that can be used for new cutting and polishing methods enabling their use in applications such as ARPES. The hydrothermal growth of SBBO greatly reduces the disorder in the crystals enabling a more confident determination of their optical properties. The recent structural redetermination of SBBO and the examination of their optical properties will be discussed.

Proceedings Article | 7 May 2012 Paper

Advanced smart multifunctional laser crystals for next generation solid state lasers

D. Brown, K. Kowalewski, V. Envid, J. Zembek, J. Kolis, C. McMillen, H. Geisber

Proceedings Volume 8381, 838108 (2012) https://doi.org/10.1117/12.921434

KEYWORDS: Crystals, YAG lasers, Laser crystals, Nd:YAG lasers, Doping, Ions, Samarium, Absorption, Solid state lasers, Oxides

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Proceedings Article | 7 May 2012 Paper

Cryogenic Yb:YAG picosecond laser with high average power visible and ultraviolet harmonic generation

D. Brown, K. Kowalewski, V. Envid, J. Zembek, B. Canale, J. Kolis, C. McMillen, H. Geisber

Proceedings Volume 8381, 83810T (2012) https://doi.org/10.1117/12.921425

KEYWORDS: Crystals, Second-harmonic generation, Cryogenics, Ultraviolet radiation, Picosecond phenomena, Nonlinear crystals, Visible radiation, Harmonic generation, Temperature metrology, Copper

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Proceedings Article | 26 February 2010 Paper

Progress in crystalline semiconductor core optical fibers

J. Ballato, T. Hawkins, P. Foy, C. McMillen, R. Stolen, R. Rice

Proceedings Volume 7598, 759815 (2010) https://doi.org/10.1117/12.846767

KEYWORDS: Optical fibers, Crystals, Germanium, Silicon, Single crystal X-ray diffraction, Raman spectroscopy, Cladding, Crystallography, Semiconductors, Crystal optics

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Proceedings Article | 2 December 2009 Paper

Progress in semiconductor optical fibers

J. Ballato, T. Hawkins, P. Foy, B. Kukuoz, C. McMillen, R. Stolen, N. Hon, B. Jalali, R. Rice

Proceedings Volume 7630, 76301S (2009) https://doi.org/10.1117/12.853237

KEYWORDS: Optical fibers, Germanium, Silicon, Crystals, Cladding, Raman spectroscopy, Semiconductors, Single crystal X-ray diffraction, Glasses, Optical semiconductors

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Proceedings Article | 14 February 2008 Paper

The synthesis and properties of rare earth doped yttria and scandia for eye-safe single crystal and ceramic lasers

J. Ballato, C. McMillen, B. Kokuoz, K. Serivalsatit, J. Kolis

Proceedings Volume 6871, 68711G (2008) https://doi.org/10.1117/12.769063

KEYWORDS: Crystals, Laser crystals, Ceramics, Crystallography, Oxides, Single crystal X-ray diffraction, Nanoparticles, Particles, FT-IR spectroscopy, Solid state lasers

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Showing 5 of 7 publications

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