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Growth and optical properties of different compositions of LiNbO3 single crystal fibers

CHI-YUNG CHEN1,* , JYH-CHEN CHEN1, CHIH-TA CHIA2

Affiliation

  1. Department of Mechanical Engineering, National Central University, Jhong-Li 32001, Taiwan
  2. Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan

Abstract

In this study the laser-heated pedestal growth (LHPG) method was used to grow lithium niobate (LiNbO3) single crystal fibers with different compositions ratios [Li2CO3]/[Nb2O5] = 44:56, 45:55, 46:54, 47:53, 48:52, 48.6:51.4, 49:51 and 50:50 achieved by different seed rods. X-ray Single-Crystal Diffractometer (X-Ray/CCD) was used to determine the lattice parameters and crystalline structure of the crystals. The UV absorption spectrum, Fourier-transform infrared spectrometer and Raman scattering spectroscopy results were used to find the optical properties and standard characterization of the different LiNbO3 single crystals. We note that the wavelength of the UV absorption edge and the wave number of the O-H absorption peak were less when the Li2O composition was large. The plotted results tended to fit a Gaussian curve. The Full-Width Half-Maximum (FWHM) of the Raman peak found at 152 cm-1 of the E(TO) mode decreased linearly as the amount of the Li2O composition increased. The Raman scattering results showed that the structure at the LiNbO3 crystal became more rigid when the amount of the Li2O composition increased..

Keywords

Laser heated pedestal growth method, Lithium niobate, Infrared and Raman spectroscopy, UV absorption spectroscopy.

Submitted at: Nov. 14, 2006
Accepted at: May 15, 2007

Citation

CHI-YUNG CHEN, JYH-CHEN CHEN, CHIH-TA CHIA, Growth and optical properties of different compositions of LiNbO3 single crystal fibers, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 5, pp. 1260-1264 (2007)