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Pseudoheterodyne detection scheme for optical interferometers

Pseudoheterodyne detection scheme for optical interferometers

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© The Institution of Electrical Engineers
Published

A heterodyne signal recovery scheme for interferometric sensors based on frequency ramping of the laser diode source is described. Using a PLL detector, signals in the range 10−4 to 6 rad have been recovered, the system being linear over 5 decades.

Inspec keywords: optical fibres; light interferometers; signal detection; electric sensing devices

Other keywords: laser diode source; optical fibre interferometric sensors; pseudoheterodyne detection scheme; optical interferometers; heterodyne signal recovery scheme; frequency ramping; PLL detector

Subjects: Sensing devices and transducers; Fibre optics; Optical interferometry

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