Observation of the photorefractive effect in single-domain BaTiO3 crystal fibera)

Abstract

Photorefractive effects are, for the first time to our knowledge, observed in single-domain tetragonal BaTiO3 fibers fabricated by the laser pedestal method. The diameter and length of the fiber are 250 μm and 2 mm, respectively. The photorefractivity is confirmed both by beam amplification through two-wave mixing and holographic image storage.

A Comparative Study on Solution- and Bridgman-Grown Single Crystals of Benzimidazole by High-Resolution X-ray Diffractometry, Fourier Transform Infrared, Microhardness, Laser Damage Threshold, and Second-Harmonic Generation Measurements

“…12 It is also used in phase conjugation and image reconstruction. 8 Organic molecules containing conjugate systems have some advantages over inorganic materials because of the possibility of highly enhanced electronic nonlinear optical polarization responses. The basic structure of organic NLO materials is based on the π bond system; 13 due to the overlap of π orbitals, delocalization of electronic charge distribution leads to a high mobility of the electron density.…”

“…The search for new nonlinear optical (NLO) materials has been increased in the last few decades because of their potential applications in optical modulation, second-harmonic generation (SHG), optical signal processing, optical switching, optical data storage devices, etc . It is also used in phase conjugation and image reconstruction . Organic molecules containing conjugate systems have some advantages over inorganic materials because of the possibility of highly enhanced electronic nonlinear optical polarization responses.…”

Applications of photorefractive crystals

“…planar waveguides or optical fibres) on the basis of standard photorefractive crystals which demonstrate photorefractive properties (in particular, dynamic holographic recording and phase conjugation) in addition to traditional advantages of the waveguide structures-long length of interaction and high concentration o f light energy. And indeed, some impressive technological results were obtained recently, both on producing planar photorefractive waveguides (see the review paper by van Wood et U / 1989) and on growing of single crystal optical fibres from traditional photorefractive crystals of SBN (Hesselink and Redfield 1988), LiNbO, (Yoshinaga et a/ 1990) and BaTiO, (Ito et al 1992).…”

Birefringent and nonlinear optical assessment of single crystal lithium niobate fibres

“…Doped and undoped fibres of most optical materials may be grown for a wide range of potential applications in which their small size makes them compatible with miniature solid-state and diode lasers. These include such diverse topics as laser media and amplifiers [5], phase conjugation and image processing [6], sensing [7], high power optical beam delivery [8] and polarizers utilizing gradient index (GRIN) fibres [9].…”