Passively Q-Switched Er-Doped Fiber Laser Based on Bentonite Clay (AlHOSi) Saturable Absorber.

This paper presents the investigations toward the direct use of bentonite clay (AlHOSi) nanoparticles to act like a saturable absorber (SA) for the Q-switched pulse operation of an erbium-doped fiber laser (EDFL). The measured results reveal that with the incorporation of bentonite clay nanopowder as a SA, an EDFL is realized with a Q-switching mechanism starting at a pump power of 30.8 mW, and a Q-switched emission wavelength was noticed at 1562.

Q-switched pulse operation in erbium-doped fiber laser subject to zirconia (ZrO) nanoparticles-based saturable absorber.

In this paper, the zirconia (ZrO) nanoparticles-based saturable-absorber (SA) have been incorporated in an erbium-doped fiber laser (EDFL) cavity for achieving a Q-switched pulse operation. The implementation of the zirconia nanoparticles-based powder on the fiber facet was accomplished using the index-matching gel's adhesion effect. The incorporation of SA in the laser cavity yielded a stable and self-starting Q-switched operation under 19.

Metalloporphyrin based MOF-545 coupled with solid solution ZnCdS for efficient photocatalytic hydrogen production.

The growing concern over the rapid consumption of fossil fuels has spurred scientists to seek environment-friendly and sustainable energy alternatives. The utilization of photocatalytic water splitting shows great potential in generating environmentally friendly hydrogen energy. Zirconium-based porphyrin MOF-545 has drawn extensive attention in photocatalysis since it has strong light absorption and fast electron transfer capability.

Voice-Activated Lightweight Reacher to Assist with Upper Extremity Movement Limitations: A Case Study.

The focus of this research was to design a functional and user-friendly reacher for people with spinal cord injuries (SCIs). Engineering advancements have taken assistive robotics to new dimensions. Technologies such as wheelchair robotics and myo-electronically controlled systems have opened up a wide range of new applications to assist people with physical disabilities.