Topological insulators (TIs), are novel two-dimension materials, which can act as effective saturable absorbers (SAs) in a fiber laser. Moreover, based on the evanescent wave interaction, deposition of the TI on microfiber would create an effective SA, which has combined advantages from the strong nonlinear optical response in TI material together with the sufficiently-long-range interaction le...

Determining the pH values of microscopic plant samples may help to explain complex processes in plants, so it is an area of interest to botanists. Fiber-optic probes with small dimensions can be used for this purpose. This paper deals with the fiber-optic detection of the pH values of droplets of plant xylem exudate based on ratiometric fluorescence intensity measurements with an internal refer...

This article investigates the possibilities of gas detection using a tapered optical fiber coated with graphene oxide layer. Measurement is based on changes in light beam propagation depending process absorption to In this paper, we investigated change double-clad wide range. We present special platform constructed for deposition additional functional materials that enable preparation sensor mo...

INTRODUCTION The Thulium fiber laser has recently been tested as a potential alternative to the Holmium:YAG laser for lithotripsy. This study explores use of a short taper for expanding the Thulium fiber laser beam at the distal tip of a small-core fiber. METHODS Thulium fiber laser radiation with a wavelength of 1,908 nm, 10 Hz pulse rate, 70 mJ pulse energy, and 1-millisecond pulse duration...

We report a novel fiber-optic anemometer with self-temperature compensation capability based on a Fabry-Pérot interferometer (FPI) formed by a thin silicon film attached to the end face of a single-mode fiber. Guided in the fiber are a visible laser beam from a 635 nm diode laser used to heat the FPI and a white-light in the infrared wavelength range as the signal light to interrogate the optic...

Laser diode beam divergence is the main parameter for beam shaping and fiber optic coupling. Increasing the waveguide layer thickness is the conventional method to decrease the beam divergence. In this paper, the broadened asymmetric waveguide is introduced to decrease the divergence without increasing the optical power. The asymmetric waveguide was used to shift the vertical optical field to n...

Abstract The wide application of optical spectroscopy makes miniaturized spectrometers with fundamental importance. scalability, high-performance, low-cost, and small footprint are still contradicting each other limiting the applicability spectrometer for practical application. Here we propose a compact that satisfies four advantages. device uses fiber taper tip to generate complex leaky mode p...

Abstract A rapid and high-performance sensor for lard adulterant in edible oil was developed using the tapered plastic optical fiber (POF) coated with graphene multi-walled carbon nanotubes. The coating material deposited onto a POF taper waist diameter length of 0.45 mm 1 cm, respectively. addition used to increase sensitivity selectivity coefficient toward substance. sensing mechanism is base...

Miniaturized Whispering Gallery Mode (WGM) temperature sensor has great potentials of high resolution and great on-chip integration capability. This study focuses on the development of this kind of sensor based on the shifting wavelength of the optical resonance due to thermal expansion and thermo-optic effects of a silica microsphere. Excellent linear dependence of the wavelength shift versus ...

Quantum transduction, the process of converting quantum signals from one form energy to another is a key step in harnessing different physical platforms and associated qubits for information processing. Optoelectromechanics has been effective approaches undertake transduction optical-to-microwave signals, among others such as those using atomic ensembles, collective magnetostatic spin excitatio...