Pockels coefficients characterization of pure and iron doped lithium niobate using adaptive optics and the Czochralski crystal growth technique

Denise Edwards; Darayas Patel; Kurt Kanzler; Michael Curley; Sundar Bairavarasu; Hossin Abdeldayem; Curtis Banks; Tesfaye Gebre; Manmohan D. Aggarwal; Jai Ching Wang; Matthew E. Edwards

doi:10.1117/12.618175

7 September 2005 Pockels coefficients characterization of pure and iron doped lithium niobate using adaptive optics and the Czochralski crystal growth technique

Denise Edwards, Darayas Patel, Kurt Kanzler, Michael Curley, Sundar Bairavarasu, Hossin Abdeldayem, Curtis Banks, Tesfaye Gebre, Manmohan D. Aggarwal, Jai Ching Wang, Matthew E. Edwards

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Proceedings Volume 5876, Laser Beam Shaping VI; 58760Y (2005) https://doi.org/10.1117/12.618175
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We have measured the r_c (effective electrooptical coefficient) of pure and doped Ferroelectric Lithium Niobate (LN) using a single beam, null detection polarimeter. The polarimeter is adjustable between two adaptive optics configurations--an iris hard stop beam pattern on the one hand and a diffractive optics generated top-hat beam on the other. We clearly show the need to control thermal heating of LN due to the transmitted laser beam. The required heating control has been implemented using a fabricated metallic heat sink called a "Cold Finger." In addition to its electrooptical properties, LN possesses a combination of unique piezoelectric, pyroelectric, and photorefractive properties. These properties make it suitable for applications in optical devices as frequency doublers, modulators, switches, and filters in communication systems and holographic recording medium. We present the classical microscopic anharmonic oscillator description for generating Pockels coefficients, and briefly describe the polarimetry measurement system. Here, the growth of pure and iron doped lithium Niobate is also described using an Automatic Diameter Control Czochralski Design growth technique. The results of growth, electrooptic measurements, adaptive optics implementation and some physical properties are compared and presented.

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Denise Edwards, Darayas Patel, Kurt Kanzler, Michael Curley, Sundar Bairavarasu, Hossin Abdeldayem, Curtis Banks, Tesfaye Gebre, Manmohan D. Aggarwal, Jai Ching Wang, and Matthew E. Edwards "Pockels coefficients characterization of pure and iron doped lithium niobate using adaptive optics and the Czochralski crystal growth technique", Proc. SPIE 5876, Laser Beam Shaping VI, 58760Y (7 September 2005); https://doi.org/10.1117/12.618175

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KEYWORDS

Crystals

Lithium niobate

Electro optics

Polarimetry

Refractive index

Adaptive optics

Iron

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