Abstract

A Yb-doped double-cladding fiber amplifier is v-groove side pumped by a 100μm-wide, broad-stripe, 975-nm laser diode. The amplifier exhibits, separately, 39% electrical-to-optical conversion efficiency, 89% internal optical-to-optical conversion efficiency, 4-W output power at 1060  nm, and a small-signal gain of 53  dB.

© 1999 Optical Society of America

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