Long Distance Distributed Strain Sensing in OFDR by BM3D-SAPCA Image Denoising

We present a long distance distributed strain sensing in optical frequency domain reflectometry (OFDR) by shape-adaptive principal component analysis Block-Matching three-dimensional filter (BM3D-S…

Elimination of Side Lobe Ghost Peak Using Wiener Deconvolution Filter in OFDR

Ghost peaks refer to these peaks on backscattering trace measured by a reflectometer similar to Fresnel reflection peaks appearing at the position of non-reflection events in optical fiber or optic…

Hybrid Sapphire Dual-Fabry—Perot-Cavities Sensor for High Temperature and R…

We presented a hybrid sapphire dual-Fabry-Perot- cavities sensor for high temperature and refractive index measurement. A double-sided polished sapphire solid wafer is connected in series with a do…

Review of Fiber Mechanical and Thermal Multi-Parameter Measurement Technologi…

In extreme environments such as abysmal sea and deep space, the characteristics of low-temperature, vacuum, electromagnetic interference will significantly affect the performance of measuring instr…

High Accuracy and Real-Time Positioning Using MODWT for Long Range Asymmetric…

The key technology to demodulate the vibration position along the sensing fiber link in the asymmetric fiber interferometer based vibration sensors is to extract similar variation features with hig…

High Sensitivity Distributed Static Strain Sensing Based on Differential Rela…

We present a novel distributed high sensitivity static strain sensing method based on differential relative phase in optical frequency domain reflectometry (OFDR). By performing two separate tests …

Dual-Frequency CARS Excitation Source With Two Independent-Tunable Stokes Wav…

An excitation source with two independent-tunable Stokes wavelengths is demonstrated for dual-frequency coherent anti-Stokes Raman scattering applications. Two Stokes wavelengths can be independent…

L-Band Wavelength-Tunable Er3+-Doped Tellurite Fiber Lasers

The spectroscopic properties of Er 3+ -doped tellurite glasses were investigated and a 1 wt.% Er 3+ -doped tellurite fiber was fabricated for L-band lasers. Wavelength-tunable fiber lasers in a lin…

Self-Filtering High-Resolution Dual-Sapphire-Fiber-Based High-Temperature Sensor

An S-transform-Based Positioning Method for Asymmetric Interferometer Disturb…