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  1. No Access

    Article

    Q-switched operation of dual-cavity Nd:YAG lasers

    We report Q-switched operation of a dual-cavity Nd:YAG laser with a fundamental Gaussian TEM00 mode, a first-order Laguerre–Gaussian mode, or a multimode, which can be selected simply by adjusting the apertures i...

    E. K. Park, Y. J. Oh, I. C. Park, J. W. Kim in Journal of the Korean Physical Society (2023)

  2. No Access

    Article

    High-power extra-large-mode-area Yb-doped fiber laser and amplifier at 978 nm

    We report an efficient, high-power operation of a fiber laser and a power amplifier at ~ 978 nm incorporating an extra-large-mode-area (XLMA) triple-clad Yb-doped fiber. A simple numerical calculation for the ...

    J. P. Kim, J. S. Park, Y. J. Oh, E. H. Han… in Journal of the Korean Physical Society (2021)

  3. No Access

    Article

    Efficient wavelength-tunable operation of tandem-pumped Yb fiber lasers

    Highly efficient operation of double-clad Yb fiber lasers with fixed-wavelength and wavelength-tunable resonator configurations tandem-pumped by tunable Yb fiber lasers is reported. When wavelength selection w...

    Y. J. Jung, M. J. Jeon, H. Jeong, J. W. Kim in Applied Physics B (2017)

  4. No Access

    Article

    Structural, electrical, and multiferroic properties of Aurivillius (Bi7−x La x )Fe3Ti3O21 thin films

    The effects of La3+- ion do** on the structural, electrical, and multiferroic properties of the six-layered Aurivillius-phase Bi7Fe3Ti3O21 thin film were investigated. A chemical solution deposition method was ...

    C. M. Raghavan, J. W. Kim, J. Y. Choi, S. S. Kim… in Journal of the Korean Physical Society (2016)

  5. No Access

    Article

    High-power TEM00 and Laguerre–Gaussian mode generation in double resonator configuration

    A simple method for controlling the spatial gain distribution in an end-pumped solid-state laser to allow the selective excitation of the fundamental Gaussian (TEM00) and the first-order Laguerre–Gaussian doughn...

    D. J. Kim, J. W. Kim in Applied Physics B (2015)

  6. No Access

    Article

    Effects of rare-earth (Tb, Yb, and Lu)-do** on the structural, electrical and ferroelectric properties of K0.5Bi4.5Ti4O15 thin films

    The electrical and the ferroelectric properties of pure K0.5Bi4.5Ti4O15 and a series of rare-earth-doped K0.5 RE 0.5Bi4Ti4O15 (RE = Tb, Yb, and Lu) ...

    J. W. Kim, C. M. Raghavan, J. Y. Choi, S. S. Kim in Journal of the Korean Physical Society (2015)

  7. No Access

    Article

    Effects of Mn-do** on the electrical and the ferroelectric properties of Bi6Fe2Ti3O18 thin films prepared by using chemical solution deposition

    Mn-doped Bi6Fe2Ti3O18 (Bi6Fe2-x Mn x Ti3O18, x = 0.0, 0.5, 1.0 and 1.5, represented as BFMTO00, BFMTO05, BFMTO10 and BFMTO15, respectively) thin films were prepar...

    J. W. Kim, C. M. Raghavan, J. Y. Choi, W-J. Kim… in Journal of the Korean Physical Society (2015)

  8. No Access

    Article

    Effects of Ho- and Ni-do** alone and of co-do** on the structural and the electrical properties of BiFeO3 thin films

    The effects of Ho and Ni do** alone and of co-do** with Ho and Ni on the structural, electrical and ferrolectric properties of BiFeO3 thin films are reported. Pure BiFeO3, (Bi0.9Ho0.1)FeO3, Bi(Fe0.98Ni0.02)O3...

    J. W. Kim, C. M. Raghavan, J. Y. Choi, S. S. Kim in Journal of the Korean Physical Society (2015)

  9. No Access

    Article

    Structural, electrical and optical properties of a Li-doped ZnO thin film fabricated on a Pt(111)/Ti/SiO2/Si(100) substrate

    A Li-doped ZnO (Zn1−x Li x O1−δ , x = 0.12) thin film was fabricated on a Pt(111)/Ti/SiO2/Si(100) substrate by using a chemical solution depositio...

    C. M. Raghavan, J. W. Kim, K. W. Jang, S. S. Kim in Journal of the Korean Physical Society (2015)

  10. No Access

    Article

    Design of polarized radioactive-ion beams at the RISP for nuclear-structure, nuclear-reaction and astrophysics experiments

    Polarized rare isotope (RI) beams have been designed at the Rare Isotope Science Project (RISP) for the study of the nuclear-structure, nuclear-reaction and astrophysics experiments. A powerful method has been...

    W. Kim, A. Gladkov, V. Kavtanyuk, Y. Seon… in Journal of the Korean Physical Society (2015)

  11. No Access

    Article

    High-power master-oscillator power-amplifier with optical vortex output

    A high-power master-oscillator power-amplifier with optical vortex output is reported. The master oscillator for an optical vortex seed beam is a simple two-mirror Nd:YAG laser using a fiber-based pump beam co...

    D. J. Kim, J. W. Kim, W. A. Clarkson in Applied Physics B (2014)

  12. No Access

    Article

    Design of the RAON accelerator systems

    The RAON is the name of the heavy ion accelerator facility under construction in Korea that includes the In-flight Fragment (IF) and Isotope Separation On-Line (ISOL) facilities to support cutting-edge researc...

    D. Jeon, I. S. Hong, H. J. Kim, J. W. Kim… in Journal of the Korean Physical Society (2014)

  13. No Access

    Article

    Structural, ferroelectric and electrical properties of Fe-doped K0.5Bi4.5Ti4O15 thin films prepared by using a chemical solution deposition

    The effects of Fe3+ ion do** on the structural, ferroelectric and electrical properties of K0.5Bi4.5Ti4O15 (KBTi) thin films were investigated. Pure KBTi and Fe-doped KBTi (KBTFe) thin films were prepared by us...

    J. W. Kim, C. M. Raghavan, S. S. Kim in Journal of the Korean Physical Society (2013)

  14. No Access

    Article

    Thermal distribution of a carbon foil used to extract a 30-MeV proton beam

    Modern cyclotron technology employs negative hydrogen (H−) ion acceleration and positive hydrogen (H+) ion (proton) extraction using a carbon foil, which strips two electrons. The strip** efficiency depends on ...

    J. H. Kim, J. W. Kim, Y. S. Kim in Journal of the Korean Physical Society (2013)

  15. No Access

    Article

    Structural and electrical studies on rare-earth-element-substituted (Bi0.9 A 0.1)(Fe0.975Ti0.025)O3+δ (A = Nd, Gd, Eu) thin films

    Pure BiFeO3 (BFO) and rare-earth-metal-ion co-substituted (Bi0.9 A 0.1)(Fe0.975Ti0.025)O3+δ (A = Nd, Gd and Eu, denoted by BNdFTi, BGdFTi, and BEuFTi, respectively...

    C. M. Raghavan, J. W. Kim, W. J. Kim, S. S. Kim in Journal of the Korean Physical Society (2012)

  16. No Access

    Article

    High-power laser operation of the first-order Laguerre-Gaussian (LG01) mode in a diode-laser-pumped Nd:YAG laser

    High-power operation of an Nd:YAG laser with a first-order Laguerre-Gaussian (LG01) mode output by using a simple pump-beam-sha** technique in an end-pumped solid-state laser configuration is reported. An analy...

    J. W. Kim in Journal of the Korean Physical Society (2012)

  17. No Access

    Article

    Efficient second-harmonic generation of continuous-wave Yb fiber lasers coupled with an external resonant cavity

    Efficient second-harmonic generation of continuous-wave Yb fiber lasers is reported. A simple bow-tie external resonant cavity incorporating a type I LBO nonlinear optical crystal was employed for second harmo...

    J. W. Kim, J. Jeong, K. Lee, S. B. Lee in Applied Physics B (2012)

  18. No Access

    Article

    Electrical properties of Dy, Mn Co-doped BiFeO3 thin films prepared by using chemical solution deposition

    The effects of Dy, Mn alone do** and co-do** on the structural, electrical and ferroelectric properties of BiFeO3 thin films were investigated. (Bi1−x Dy x )(...

    J. W. Kim, C. M. Raghavan, H. J. Kim, Y. J. Kim… in Journal of the Korean Physical Society (2012)

  19. No Access

    Article

    Structure and electrical properties of (La, Zn) Co-doped BiFeO3 thin films prepared by using chemical solution deposition

    We prepared pure BiFeO3 (BFO) and (Bi0.9La0.1)(Fe0.975Zn0.025)O3−δ (BLFZO) thin films on Pt(111)/Ti/SiO2/Si(100) substrates by using a chemical solution deposition method. Improved electrical pro...

    Y. J. Kim, H. J. Kim, J. W. Kim, C. M. Raghavan… in Journal of the Korean Physical Society (2012)

  20. No Access

    Article

    Reduced leakage current and improved ferroelectric properties of Eu and Mn codoped BiFeO3 thin films

    We prepared (Bi0.94Eu0.06)(Fe0.94Mn0.06)O3 (BEFM), (Bi0.94Eu0.06)FeO3 (BEFO), and BiFeO3 (BFO) thin films on Pt(111)/Ti/SiO2/Si(100) substrates by using a pulsed laser deposition method. X-ray diffraction and Ram...

    D. Do, J. W. Kim, S. S. Kim, W. -J. Kim… in Journal of the Korean Physical Society (2012)

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