Fiber optic interferometers to sense various physical parameters including temperature, strain, pressure, and refractive index have been widely investigated. They can be categorized into four types: Fabry-Perot, Mach-Zehnder, Michelson, and Sagnac. In this paper, each type of interferometric sensor is reviewed in terms of operating principles, fabrication methods, and application fields. Some s...

The dependence of the frin ge pattern of an oscill ating Fabry-Pcrot intcrferomctcr upon the vibration a mplitude is discussed cxperimentall y a nd thcoret icall y. If t hc frin gcs of t he stationary interferomet er are wide, the frin gc pattcrn tends to di sappea r at certain valucs of the amplitude. If the stationary frin ges a re narrow, a splitting of frin ges occurs at ccrtain a mpli tude...

We developed algorithms which allow us to find regimes of the signal-recycled Fabry-Perot–Michelson interferometer [for example, the Advanced Laser Interferometric Gravitational Wave Observatory (LIGO)], optimized concurrently for two (binary inspirals þ bursts) and three (binary inspirals þ bursts þ millisecond pulsars) types of gravitational wave sources. We show that there exists a relativel...

Recently we developed ultrasound-modulated optical microscopy (UOM) based on a long-cavity confocal Fabry-Perot interferometer (CFPI). This interferometer is used for real-time detection of multiply scattered light modulated by high frequency (30 to 75 MHz) ultrasound pulses propagating in an optically, strongly scattering medium. In this work, we use this microscope to study the dependence of ...

The algorithms used for reduction of data obtained in a Fabry-Perot interferometer mode of the new focal reducer of the 6m telescope SCORPIO are described. The main attention is focused on the procedures of photometry correction of channels and night sky emission subtraction, which is especially important for observations with a CCD in comparison with a photon counter. The influence of various ...

We report the frequency stabilization of an erbium-doped fiber distributedfeedback laser using an all-fiber based Michelson interferometer of large arm imbalance. The interferometer uses a 1 km SMF-28 optical fiber spool and an acousto optic modulator allowing heterodyne detection. The frequency noise power spectral density is reduced by more than 40 dB for Fourier frequencies ranging from 1 Hz...

A coherent perfect absorber is essentially a specially designed Fabry-Perot interferometer, which completely extinguishes the incident coherent light. The one- and two-beam coherent perfect absorbers have been analyzed using classical electrodynamics by considering index matching in layered structures to totally suppress reflections. This approach presents a clear and physically intuitive pictu...

[1] Novel optical measurements of F-region ion temperatures have been made in conjunction with thermospheric neutral temperatures. A ground-based FabryPerot interferometer has been used to observe high-latitude Fregion ion temperatures using the O(P) auroral emission at 732 nm, and upper-thermospheric neutral temperatures using the O(D) airglow emission at 630 nm. Dual wavelength measurements w...