Doped Glass Fiber Laser Research Articles

Dual-wavelength Bi2Se3-based passively Q-switching Nd3+-doped glass all-fiber laser

We demonstrate a dual-wavelength passively Q-switched Nd3+-doped glass fiber laser using a few-layer topological insulator Bi2Se3 as a saturable absorber (SA) for the first time, to the best of our knowledge. The laser resonator is a simple and compact linear cavity using two fiber end-facet mirrors. The SA is fabricated by Bi2Se3/polyvinyl alcohol composite film. By inserting the SA into the laser cavity, a stable Q-switching operation is achieved with the shortest pulse width and maximum pulse repetition rate of 601 ns and 205.2 kHz, respectively. The maximum average output power and maximum pulse energy obtained are about 6.6 mW and 38.8 nJ, respectively.

Feedback controlled laser system for safe and efficient reshaping of nasal cartilage

Laser septochondrocorrection (LSC) is a non-invasive, bloodless, painless procedure which takes only 10 minutes to complete and can be performed in outpatient settings. The efficacy and safety of this technology can be guarantied with the feed-back control system monitoring tissue characteristics in the course of laser treatment. Laser medical equipment for septochondrocorrection includes an Erbium doped glass fiber laser, special instrument, opto thermo mechanical contactor, and feed back control system measuring temperature on the nasal septum surface and switching the laser off when preset value of temperature is achieved. To the date LSC procedure has been applied for 380 patients, aging from 12 until 68 years. The new laser equipment LRC-701 manufactured by Arcuo Medical Inc. was tested for 106 patients in Moscow and for 64 patients in Crete. The positive results habe been obtained for 95 percent of the patients with two years follow-up. No age limitation, no complications and negative secondary effects were observed.

S271 – The Use of Erbium Doped Glass Fiber Laser in Septoplasty

Objectives To evaluate the efficacy of Erbium doped glass fiber laser in patients undergoing cartilage reshaping under local anesthesia. Methods A prospective study was conducted in 64 patients undergoing laser nasal septal cartilage reshaping. Micro-surgical sponges soaked in a tetracaine solution plus adrenalines were applied in each side of the nose for 10 minutes before the procedure. The cartilage of nasal septum was straightened and fixed in the median position using a modified nasal speculum. An optothermomechanical contactor with transparent indenter and thermocouple sensor was placed on septal regions of maximum mechanical stress. Patients were asked to evaluate the severity of pain during the procedure on a visual analog scale. A rhinomanometric evaluation was conducted prior to and after the procedure. All patients were asked to evaluate the improvement of their symptoms. All patients' data and potential complications were put in a database and were statistically assessed. Results Statistical analysis showed significant improvement of their symptoms and of rhinomanometric results. No complications or side effects occurred. The mean operative time was 35 minutes. Conclusions Septal cartilage reshaping is an easy, painless, and bloodless method using an Erbium doped glass fiber Laser. Laser device LSC-701 (Arcuo Medical Inc.) is an effective, safe, and inexpensive medical equipment.

Facial resurfacing: An overview

Facial resurfacing is a broad topic referring to procedures that change the texture and appearance of skin. Resurfacing procedures are broadly classified as ablative or nonablative. Ablative procedures are considered the first line treatment for the most common indications for facial resurfacing, which are photoaging and acne scarring. The goal of this review is to provide an overview of the factors that optimize the clinical efficacy of an ablative procedure, including careful patient selection, preoperative skin preparation, correct operative technique, and vigilant postoperative care, as well as review both the traditional and some of the latest technologies that effectively resurface facial skin.