Applied Physics B

, 92:535 | Cite as

Collinear broadband optical parametric generation in periodically poled lithium niobate crystals by group velocity matching

  • O. Prakash
  • H.-H. Lim
  • B.-J. Kim
  • K. Pandiyan
  • M. Cha
  • B. K. Rhee
Article

Abstract

Collinear broadband optical parametric generation (OPG) using periodically poled lithium niobate (PPLN) crystals were designed and experimentally demonstrated with the quasi-phase matching (QPM) periods of 21.5, 24.0, and 27.0 µm. The broad gain bandwidth was accomplished by choosing a specific set of the period and the pump wavelength that allows the group velocities of the signal and the idler to match close to the degeneracy point. OPG gain bandwidth and also the spectral region could be controlled by proper design of QPM period and pump wavelength. The total OPG gain bandwidth of 600, 900, and 1200 nm was observed for the PPLN devices with QPM periods of 21.5, 24.0, and 27.0 µm, respectively. We have also observed multiple color visible generation whenever the OPG spectrum was significantly broad. From the visible peaks of the three PPLN samples, it is found that broad gain bandwidth is crucial in the temperature-insensitive collinear simultaneous RGB generation from a single crystal.

PACS

42.65.Ky 42.65.Yj 42.65.Lm 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • O. Prakash
    • 1
  • H.-H. Lim
    • 1
  • B.-J. Kim
    • 1
  • K. Pandiyan
    • 1
  • M. Cha
    • 1
  • B. K. Rhee
    • 2
  1. 1.Department of PhysicsPusan National UniversityBusanKorea
  2. 2.Department of PhysicsSogang UniversitySeoulKorea

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