Thermal Effect Study of LD Edge-Pumped Slab Lasers

Preparation and Spectral Properties of Er³⁺/Yb³⁺ Co-Doped Phosphate Glass Active Optical Fiber

“…Usually Yb-ions dopant concentration is as 10 times as Er-ions in phosphate matrix, which efficiently separate adjacent Er-ions and decrease the probability of Er-ions pairs generation. This effect greatly decreases the up transversal probability and concentration repression, which is crucial to improve optical gain [10][11][12]. Er 3+ /Yb 3+ co-doped system energy level diagram is indicated in Fig.…”

“…The aforesaid advantages of Er 3+ /Yb 3+ co-doped fiber material has attracted considerable attention to achieve high gain amplifier. Many research companies have obtained substantial results with singal gain of many dozens dBcm [7][8][9][10][11].…”