The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform

Huib J Bakker - One of the best experts on this subject based on the ideXlab platform.

  • influence of pump waveLength and Crystal Length on the phase matching of optical rectification
    Journal of The Optical Society of America B-optical Physics, 2005
    Co-Authors: Nick C J Van Der Valk, P C M Planken, Anton N Buijserd, Huib J Bakker
    Abstract:

    We present measurements on terahertz generation by optical rectification, in which both the thickness of the generation Crystal and the waveLength of the generating optical pulse are varied. The difference between the group velocity at optical frequencies and the phase velocity at terahertz frequencies affects the time trace and spectrum of the generated terahertz pulse. For the thickest Crystal, we find that the phase mismatch gives rise to the generation of two pulses, separated by 4.5 ps. The physical origin of the observed features is clarified with a simple model that includes phase matching and absorption.

Dehua Li - One of the best experts on this subject based on the ideXlab platform.

  • Generation of 1053-nm femtosecond pulses by Yb:YAG laser
    Conference on Lasers and Electro-Optics International Quantum Electronics Conference, 2009
    Co-Authors: Binbin Zhou, Dehua Li, Hao Teng, Gilbert L. Bourdet
    Abstract:

    Femtosecond Yb:YAG laser at 1053 nm was realized by optimized Crystal Length and doping concentration, stable mode-locking power of 180 mW was achieved under 2W pump. Measurement shows 170fs pulse duration and 7nm spectrum bandwidth.

  • Optical-to-THz conversion efficiency analysis and comparison of ZnTe, DAST, LiNbO 3 Crystals
    Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology, 2008
    Co-Authors: Dehua Li, Xiaodong Qi
    Abstract:

    A theoretical analysis of optical-to-THz conversion efficiency via optical rectification in nonlinear Crystal and the conversion efficiency comparison of ZnTe, DAST, LiNbO 3 is presented; The optical-to-THz conversion efficiencies are mainly affected by following several factors; Pulse durations mostly affect the conversion efficiency: Optical-to-THz conversion efficiency approaches to a maximum when Crystal Length is equal to the optimal Length Lc, for the periodically-inverted Crystals, conversion efficiency is almost proportional to the Crystal Length when absorption of medium is negligible. Taking account of the absorption of Crystals, effective Length of Crystal is L eff =0.63/α, the conversion efficiency approaches to a constant eventually when the Crystal Length is increased for Crystal DAST and LiNbO 3 . But the optical-to-THz wave conversion efficiency of ZnTe will increase rapidly with increase of Crystal Length.

  • A theoretical analysis of optical-to-THz conversion efficiency via optical rectification
    Science China-technological Sciences, 2008
    Co-Authors: Dehua Li, Xiaodong Qi
    Abstract:

    A theoretical analysis of an ultra-short pulse converted to Terahertz radiation via optical rectification in nonlinear optical Crystal is presented here; several factors that affect optical-to-THz conversion efficiencies are discussed; pulse durations affect the conversion efficiency effectively: when Crystal Length is equal to the optimal Crystal Length l c, optical-to-THz conversion efficiency is the highest, but for the periodically-inverted electro-optic Crystals, conversion efficiency is almost proportional to the Crystal Length when absorption can be neglected. Taking account of the absorption of Crystals, effective Length of Crystal is L eff=0.63/α, there is no apparent increase of conversion efficiency and the conversion efficiency approaches to a constant eventually when the Crystal Length is increased.

Xiaodong Qi - One of the best experts on this subject based on the ideXlab platform.

  • Optical-to-THz conversion efficiency analysis and comparison of ZnTe, DAST, LiNbO 3 Crystals
    Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology, 2008
    Co-Authors: Dehua Li, Xiaodong Qi
    Abstract:

    A theoretical analysis of optical-to-THz conversion efficiency via optical rectification in nonlinear Crystal and the conversion efficiency comparison of ZnTe, DAST, LiNbO 3 is presented; The optical-to-THz conversion efficiencies are mainly affected by following several factors; Pulse durations mostly affect the conversion efficiency: Optical-to-THz conversion efficiency approaches to a maximum when Crystal Length is equal to the optimal Length Lc, for the periodically-inverted Crystals, conversion efficiency is almost proportional to the Crystal Length when absorption of medium is negligible. Taking account of the absorption of Crystals, effective Length of Crystal is L eff =0.63/α, the conversion efficiency approaches to a constant eventually when the Crystal Length is increased for Crystal DAST and LiNbO 3 . But the optical-to-THz wave conversion efficiency of ZnTe will increase rapidly with increase of Crystal Length.

  • A theoretical analysis of optical-to-THz conversion efficiency via optical rectification
    Science China-technological Sciences, 2008
    Co-Authors: Dehua Li, Xiaodong Qi
    Abstract:

    A theoretical analysis of an ultra-short pulse converted to Terahertz radiation via optical rectification in nonlinear optical Crystal is presented here; several factors that affect optical-to-THz conversion efficiencies are discussed; pulse durations affect the conversion efficiency effectively: when Crystal Length is equal to the optimal Crystal Length l c, optical-to-THz conversion efficiency is the highest, but for the periodically-inverted electro-optic Crystals, conversion efficiency is almost proportional to the Crystal Length when absorption can be neglected. Taking account of the absorption of Crystals, effective Length of Crystal is L eff=0.63/α, there is no apparent increase of conversion efficiency and the conversion efficiency approaches to a constant eventually when the Crystal Length is increased.

Nick C J Van Der Valk - One of the best experts on this subject based on the ideXlab platform.

  • influence of pump waveLength and Crystal Length on the phase matching of optical rectification
    Journal of The Optical Society of America B-optical Physics, 2005
    Co-Authors: Nick C J Van Der Valk, P C M Planken, Anton N Buijserd, Huib J Bakker
    Abstract:

    We present measurements on terahertz generation by optical rectification, in which both the thickness of the generation Crystal and the waveLength of the generating optical pulse are varied. The difference between the group velocity at optical frequencies and the phase velocity at terahertz frequencies affects the time trace and spectrum of the generated terahertz pulse. For the thickest Crystal, we find that the phase mismatch gives rise to the generation of two pulses, separated by 4.5 ps. The physical origin of the observed features is clarified with a simple model that includes phase matching and absorption.

P C M Planken - One of the best experts on this subject based on the ideXlab platform.

  • influence of pump waveLength and Crystal Length on the phase matching of optical rectification
    Journal of The Optical Society of America B-optical Physics, 2005
    Co-Authors: Nick C J Van Der Valk, P C M Planken, Anton N Buijserd, Huib J Bakker
    Abstract:

    We present measurements on terahertz generation by optical rectification, in which both the thickness of the generation Crystal and the waveLength of the generating optical pulse are varied. The difference between the group velocity at optical frequencies and the phase velocity at terahertz frequencies affects the time trace and spectrum of the generated terahertz pulse. For the thickest Crystal, we find that the phase mismatch gives rise to the generation of two pulses, separated by 4.5 ps. The physical origin of the observed features is clarified with a simple model that includes phase matching and absorption.