The spectral spacing of the interference fringes formed by a pair of long-period fiber gratings
was investigated. The variation of the fringe spacing was measured while the separation …

We demonstrate implementation of an all-fiber Mach–Zehnder interferometer formed in a
photonic crystal fiber (PCF). We formed the all-PCF Mach–Zehnder interferometer by …

A review of refractive index measurement based on different types of optical fiber sensor
configurations and techniques is presented. It addresses the main developments in the area …

We investigate leaky-mode propagation of the cladding modes of an optical fiber through
coupling with a long-period fiber grating. A one-dimensional ray propagation model is …

We present two novel schemes for refractometry based on a long-period fiber grating–(LPG-
) based Michelson interferometer. These schemes are designed to overcome the …

A robust graphene-coated in-fiber Mach-Zehnder interferometer (MZI) formed with a pair of 3-
dB long-period fiber gratings is proposed and demonstrated for ammonia (NH 3) gas …

An optical liquid-level sensor (LLS) based on a long-period fiber grating (LPG)
interferometer is proposed and experimentally demonstrated. Two identical 3-dB LPGs are …

The paper deals with the response of a Mach–Zehnder interferometer composed by two 3-
dB long period gratings (LPG) with different external refractive indices higher than that of …

We present a refractive index (RI) sensor based on a fiber Mach–Zehnder interferometer
(MZI) formed by two cascaded special long-period fiber gratings (LPFGs) with rotary …

The authors describe self-interference fringes created in a single long-period fibre grating
(LPG) formed in a double-cladding fibre, one end of which is coated with a metal film. The …