980-mn diode-pumped Er-doped fiber optical amplifiers with high gain-bandwidth product

<title>980-nm quantum-well ridge waveguide lasers with high coupled power intosingle-mode fiber</title>

“…Strained layer quantum well lasers emitting at a wavelength of 980nm have demonstrated great potential as practicable pump sources for Er-doped Fiber Amplifiers (EDFA's) [1]. For this application, it is necessary to launch relatively high levels of continuous wave power into single mode optical fiber, which is most readily accomplished by confining the laser to single spatial mode operation.…”