Title:	Thermo-optic nonlinearity of the laser dye LDS 867 under low power CW laser excitation
Authors:	Ann Mary, K.A. Sonia Mary, E.J. Vidyadharan, Viji Philip, Reji Unnikrishnan, N.V.
Issue Date:	17-Feb-2015
Publisher:	IOP Publishing Ltd.
Citation:	IOP Conference Series: Materials Science and Engineering, 2015, Vol 73, p012055
Abstract:	Thermally induced optical nonlinearity of the laser dye LDS 867 is studied in ethanol solution using the self phase modulation and closed aperture z-scan techniques, employing a continuous wave low power He-Ne laser beam for excitation. The nonlinear optical (NLO) coefficients are obtained by analyzing the z-scan curve on the basis of the thermal lens model. The dye exhibits a negative thermal nonlinearity which can be inferred from the occurrence of a pre-focal peak followed by a post-focal valley in the z-scan. The large nonlinear refractive index (n2) measured at the excitation wavelength of 633nm reveals that the material is NLO active even at low excitation powers of less than 1 mW. Results indicate that LDS 867 is a promising material for optical power limiting applications.
Description:	Open Access, Book Chapter from International Conference on Materials Science and Technology (ICMST 2012), 10–14 June 2012, Kerala, India
URI:	http://hdl.handle.net/2289/6205
Alternative Location:	http://adsabs.harvard.edu/abs/2015MS%26E...73a2055M http://dx.doi.org/10.1088/1757-899X/73/1/012055
Copyright:	2015 IOP Publishing Ltd.
Appears in Collections:	Research Papers (LAMP)

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