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Optical Isolators

Photonics Spectra
Jun 2010
Optek Technology, Industrial Sensing & ControlRequest Info
 
TT electronics Optek Technology’s OPI1268 optical isolator delivers AC and DC voltage isolation up to 16 kV while achieving digital data transmission rates of 2 MBd. It is UL-recognized and designed for power isolation in high-voltage PC board circuits in industrial electronics systems, medical electronic equipment and office machines. The output integrated circuit (IC) detects the incoming optical signal and converts it to a proportionate current, which is fed through a linear amplifier and compensated for temperature, current and voltage, resulting in stable digital output with an open collector inverter configuration. The device comprises a GaAlAs LED with a peak wavelength of 850 nm, optically coupled to a Photologic photodiode in the output IC. Packaged in an opaque plastic housing, it measures 27.94 x 6.35 x 8.89 mm and operates from —40 to 100 °C.


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GLOSSARY
isolator
A device intended to prevent return reflections along a transmission path.
linear amplifier
Amplifier in which the input and output pulse heights are directly proportional.
optical isolator
Also known as an optical diode, an optical isolator is a device that utilizes the Faraday effect to suppress or redirect backscattered or backreflected light in order to allow light transmission in one direction only. Optical isolators are commonly found in laser cavities.
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