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We report a heavily Yb3+/Al3+/B3+/F- co-doped high silica rod with a negative refractive index relative to pure silica. The high silica rod was fabricated from nanoporous silica rod by the glass phase-separation technology. For lowering the refractive index, B3+ and F- were simultaneously introduced into the silica rod. The optical properties of the silica rod were investigated. The fiber preform was prepared by the rod-in-tube method by which the Yb3+ doped high silica rod was only used as an active core. The fiber has a core diameter of 80 μm and a cladding diameter of 400 μm. The measurements show that the Yb3+ in the high silica fiber core is 15856 ppm by weight, while the refractive index is 0.0024 lower than that of the inner cladding. The amplification performance of the fiber was investigated. It is indicated that the nanoporous silica glass based on the glass phase-separation technology has a great potential for gain-guided index anti-guided high silica fiber.
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A way of providing nursing care that is guided by the integration of the best available scientific knowledge with nursing expertise. This approach requires nurses to critically assess relevant scientific data or research evidence, and to implement high-quality interventions for their nursing practice.
A way of providing health care that is guided by a thoughtful integration of the best available scientific knowledge with clinical expertise. This approach allows the practitioner to critically assess research data, clinical guidelines, and other information resources in order to correctly identify the clinical problem, apply the most high-quality intervention, and re-evaluate the outcome for future improvement.
A way of providing emergency medical care that is guided by a thoughtful integration of the best available scientific knowledge with clinical expertise in EMERGENCY MEDICINE. This approach allows the practitioner to critically assess research data, clinical guidelines, and other information resources in order to correctly identify the clinical problem, apply the most high-quality intervention, and re-evaluate the outcome for future improvement.
Conducting a biopsy procedure with the aid of a MEDICAL IMAGING modality.
The collecting of fetal blood samples via ultrasound-guided needle aspiration of the blood in the umbilical vein.