Broadly tunable continuous wave 2.3-µm Tm:tellurite bulk glass laser.

We report, for the first time to the best of our knowledge, a continuous wave trivalent thulium ion (Tm)-doped bulk glass near 2.3 µm. In the experiments, a bulk Tm-doped tellurite glass with the stoichiometric composition of 74TeO-12ZnO-4LaO-10NaO (Tm:TZLN) was used.

Advanced distributed feedback lasers based on composite fiber heavily doped with erbium ions.

Specially designed composite heavily Er-doped fiber in combination with unique point-by-point inscription technology by femtosecond pulses at 1,026 nm enables formation of distributed-feedback (DFB) laser with ultra-short cavity length of 5.3 mm whose parameters are comparable and even better than those for conventional Er-doped fiber DFB lasers having much longer cavity. The composite fiber was fabricated by melting rare-earth doped phosphate glass in silica tube.