Dy3+-doped materials have been proposed for optical amplifiers at 1.3 μm. Dy3+ has severa1 advantages over Pr3+-based amplifiers for 1.3-μm telecommunication applications. First, as seen in Fig. 1, numerous pump bands exist in the near-IR for populating the (6H9/2, 6F11/2) level.

© 1998 Optical Society of America

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