High-resolution strain fiber laser-sensor based on core-offset mach-zehnder interferometer

Abstract

This paper presents an axial strain laser sensing setup based on a core-offset Mach-Zehnder interferometer (MZI). The core-offset MZI was implemented by fusion splicing of three segments of single mode fiber and was used as wavelength selective filter and sensing head. The experimental results show that in the strain range from 0 to 333.333 με, the laser wavelength emission shifts linearly from 1554 to 1557 nm, achieving a strain sensitivity of 5.2332 pm/με and an R2 value of 0. 9988. The laser emission has a linewidth of 0.02 nm and a single-mode suppression ratio (SMSR) of 45 dB. Furthermore, the fiber laser offers output power stability at room temperature, compactness, and robustness. The experimental results show that in the strain range from 0 to 333.333 µε, the laser wavelength emission shifts linearly from 1554 to 1557 nm, achieving a strain sensitivity of 5.2332 pm/µε and an R2 value of 0. 9988. The laser emission has a linewidth of 0.02 nm and a single-mode suppression ratio (SMSR) of 45 dB. Furthermore, the fiber laser offers output power stability at room temperature, compactness, and robustness.

Development of a tunable infrared pyroelectric element based on the interferometer principle

“…where, FWHM is the half-power bandwidth, which affects the tuning range of the interferometer, and it can be expressed as [15]:…”

Research on sensing characteristics of microfluidic sensor based on photonic crystal fiber

“…One of the most active research directions is based on the principle of multimode interference, interference between the core mode and cladding mode, and mode interference of special fibers. Previous researchers have predominantly concentrated on the fiber core-wrapped offset structure [5][6][7], the fiber taper or waist-enlarged structure [8][9][10], and the singlemode-multimode-single-mode structure [11,12]. More recent * Author to whom any correspondence should be addressed.…”