Abstract

Erbium-doped fiber amplifiers are expected to significantly influence the future of optical fiber communication systems [1]. Recently, 980 nm was identified as being the most efficient pump wavelength where no excited state absorption exists [2]. To realize practical fiber amplifiers semiconductor laser pumping is considered to be indispensable. There is therefore a need for a high power 980 nm laser diode with a high coupling efficiency into the single-mode optical fiber.

© 1990 Optical Society of America