Header menu link for other important links
X
Wavelength dependent resonant nonlinearities in a standard saturable absorber IR26 on picosecond time scale
Basanth S. Kalanoor,
Published in
2010
Volume: 283
   
Issue: 20
Pages: 4059 - 4063
Abstract
Nonlinear optical properties of a standard dye IR26 have been studied by using the Z-scan technique to decipher the difference in the mechanism of nonlinear absorption on picosecond time scale at two wavelengths i.e. at 1064 nm and 532 nm. A prominent contribution of nonlinear absorption is observed in the Z-scan profiles at 1064 nm. The dye exhibits the mechanism of self-defocusing at 1064 nm in contrast to that of self-focusing at 532 nm. While the two photon absorption has been found to be the dominant mechanism of reverse saturable absorption at 1064 nm, the mechanism of excited state absorption is operating at 532 nm. Additionally, the optical phase conjugate geometry of degenerate four wave mixing (DFWM) technique has been used to measure the third order nonlinear susceptibility values at 532 nm to compare with those obtained from the Z-scan profiles. © 2010 Elsevier B.V.
About the journal
JournalOptics Communications
Open AccessNo
Concepts (27)
  •  related image
    1064 NM
  •  related image
    Degenerate four wave mixing
  •  related image
    DEGENERATE FOUR WAVE MIXING TECHNIQUES
  •  related image
    Dominant mechanism
  •  related image
    Excited state absorption
  •  related image
    Non-linear optical properties
  •  related image
    Nonlinear absorptions
  •  related image
    OPTICAL PHASE
  •  related image
    PICOSECOND TIME SCALE
  •  related image
    RESONANT NONLINEARITY
  •  related image
    Reverse saturable absorption
  •  related image
    Saturable absorbers
  •  related image
    SELF-DEFOCUSING
  •  related image
    SELF-FOCUSING
  •  related image
    THIRD-ORDER NONLINEAR SUSCEPTIBILITY
  •  related image
    Two photon absorption
  •  related image
    Two wavelength
  •  related image
    Z-scan
  •  related image
    Z-scan technique
  •  related image
    Absorption
  •  related image
    Dye lasers
  •  related image
    Excited states
  •  related image
    Lasers
  •  related image
    Optical materials
  •  related image
    Optical properties
  •  related image
    Semiconductor quantum wells
  •  related image
    Four wave mixing