The aim of this study was to evaluate the efficacy of autologous platelet-rich plasma (PRP) combined with erbium fractional laser therapy for facial acne or acne scars. PRP combined with erbium fractional laser therapy was used for the treatment of 22 patients, including 16 patients who suffered from facial acne scars and 6 patients who suffered from acne scars concomitant with acne. Whole bloo...

The influence of energy-transfer upconversion (ETU) between neighboring ions in the upper and lower laser levels of erbium 3m continuous-wave lasers on heat generation and thermal lensing is investigated. It is shown that the multiphonon relaxations following each ETU process generate significant heat dissipation in the crystal. This undesired effect is an unavoidable consequence of the efficie...

We demonstrate a low-threshold microsphere laser on a silicon chip, fabricated from erbium-doped silica sol–gel film. Single-longitudinal mode lasing emission is observed from a 37 μm diameter microsphere cavity with an erbium ion concentration of 2× 1019 cm−3. The measured lasing threshold of the silica microsphere laser is as low as 4.8 μW. (Some figures may appear in colour only in the onlin...

A distributed feedback channel waveguide laser in erbium-doped aluminum oxide on a silicon substrate is reported. The optically pumped laser has a threshold pump power of 15 mW and emits 3 mW in single-frequency operation at 1545.2 nm wavelength with a slope efficiency of 6.2% and linewidth of 15 kHz. Keywords—Distributed feedback (DFB) laser; waveguide laser; erbium-doped laser; Bragg gratings...

We report, for the first time to our knowledge, the presence of concentration-induced nonuniform power in tunable erbium-doped fiber lasers. A theoretical model is proposed with pair-induced quenching taken into account. We obtain good agreement between numerical and experimental results of a high-concentration erbium-doped fiber ring laser with a large tuning range of over 100 nm. These findin...

Dentistry has a new weapon in the fight against tooth decay. This ‘light saber’ of dentistry is the erbium laser. The dental laser is the latest modern innovation for the 21st Century. Erbium lasers have proven safe and effective for the removal of tooth decay and cavity preparation, in addition to many soft tissue and hard tissue surgical procedures. The FDA approved the erbium laser for marke...

Temperature-dependent measurements of the photoluminescence ~PL! intensity, PL lifetime, and infrared photocurrent, were performed on an erbium-implanted silicon p – n junction in order to investigate the energy transfer processes between the silicon electronic system and the Er 4 f energy levels. The device features excellent light trapping properties due to a textured front surface and a high...

We report on integrated erbium-doped waveguide lasers designed for silicon photonic systems. The distributed Bragg reflector laser cavities consist of silicon nitride waveguide and grating features defined by wafer-scale immersion lithography and a top erbium-doped aluminum oxide layer deposited as the final step in the fabrication process. The resulting inverted ridge waveguide yields high opt...

Techniques of film deposition by co-evaporation, ion-beam assisted mixing, oxygen ion implantation, and thermal annealingwere been combined in a novel way to study processing of erbium-in-silicon thinfilm materials for optoelectronics applications. Structures with erbium concentrations above atomic solubility in silicon and below that of silicide compoundswere prepared by vacuum co-evaporation ...