Title

Spectroscopic Evaluation Of Caya1O4 Doped With Trivalent Er, Tm, Yb And Ho For Eyesafe Laser Applications

Abstract

Spectroscopic properties of relevance for laser applications have been studied for rare earths in CaYA1O4. Fitting of a theoretical model to observed energy levels yields crystal field parameters and unobserved levels. Structural disorder leads to broad linewidths,but cross sections are larger than in many common hosts. Tm-Tm cross relaxation rates are comparable to those in Tm: YAG, and Yb-Er transfer rates are comparable to those in Yb, Er:phosphate glass. Room temperature Yb-Er upconversion is stronger than in YAG, but modeling shows that neither unconversion nor population of Er4I 13 2 is very efficient upon pumping Yb. The host's yellow color intensifies upon annealing in air, a potential problem for visible laser operation. Tm or Ho 2 μm laser operation, or Er 1.5 μ operation upon direct excitation of Er4I 13 2, are more promising. © 1994.

Publication Date

1-1-1994

Publication Title

Optical Materials

Volume

3

Issue

4

Number of Pages

287-306

Document Type

Article

Identifier

scopus

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/0925-3467(94)90042-6

Socpus ID

0028529879 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0028529879

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