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Opt Lett. 1994 Dec 15;19(24):2101-3.

Er(3+):Yb(3+)-codoped fiber distributed-feedback laser.

Abstract

We report what is to our knowledge the first fiber distributed-feedback laser using a single Bragg grating at 1.5 microm written directly into a 2-cm-long Er(3+)-doped fiber codoped with Yb(3+). We obtained robust single-frequency operation by either using one end reflector or locally heating the center of the grating to create the necessary phase shift.

PMID:
19855753
[PubMed]
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