SBN-75 (Strontium Barium Niobate) is a photorefractive crystal similar to SBN-60, but with a different composition ratio of strontium, barium, and niobium. SBN-75 has a ratio of 75:25:1, which results in different optical properties compared to SBN-60.
Like SBN-60, SBN-75 exhibits strong photorefractive properties, making it useful in holography, optical storage, and optical phase conjugation applications. However, SBN-75 has some advantages over SBN-60 in certain applications.
One advantage of SBN-75 is its higher photorefractive sensitivity, which allows for faster response times in applications such as holographic data storage. SBN-75 also has a higher photorefractive damage threshold than SBN-60, which makes it more suitable for high-power laser applications.
SBN-75 is also useful for applications such as self-pumped phase conjugation, where it can be used to correct for distortions in laser beams caused by atmospheric turbulence or other factors. In this application, SBN-75 acts as a self-pumped phase conjugate mirror, reflecting the incoming laser beam back onto itself with a phase reversal that cancels out any distortions.
Overall, SBN-75 is a valuable photorefractive crystal for a variety of optical applications, with advantages such as higher sensitivity and higher damage threshold compared to SBN-60. Its photorefractive properties make it useful in holography, optical storage, and optical phase conjugation, and it is a promising candidate for high-power laser applications.
|Crystal Structure|| |
|Lattice(Cell) Parameters, Å|| |
a = 12.43024, c = 3.91341
|Transmission Range, µm|| |
0.35 - 6.0
|Refractive Index at 0.63µm|| |
ne = 2.35, no = 2.37 @0.51µm
|Electro-Optic Coefficient r41, pm/V|| |
|Optical Activity, deg/mm at 500 nm|| |
|- deg/mm at 600 nm|| |
|Density, g/cm3|| |
|Mohs Hardness|| |
|Melting Point, C|| |
1500 ± 10°C
|Dielectric Constant|| |
|Dark Resistance, Ohm cm|| |
|Absorption coefficient @0.44µm|| |
|Thermal conductivity @25°C|| |
|Thermo-optic coefficient dne/dT|| |
|Curie temperature|| |
|Half wave Voltage|| |