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US 11,502,474 B2Granted
High efficiency 1.3μm emission in praseodymium doped conventional glass and fiber
AssigneeThorlabs, Inc.
InventorRobert M. Pafchek
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Abstract
An optical material including: a silica host; and a Praseodymium dopant; wherein the Praseodymium atoms are configured to form nanoclusters in the silica host. In addition, the optical material may include an Ytterbium co-dopant. The nanoclusters include Ge, Te, Ta, Lu and/or F, Cl to minimize multi-phonon quenching. Moreover, the nanoclusters may be encapsulated in a low phonon energy shell to minimize energy transfer to the host matrix.
Claims14
An optical material comprising:
- a silica host;
- and
- a Praseodymium dopant;
- wherein the Praseodymium atoms are configured to form nanoclusters in the silica host;
- wherein the nanoclusters are configured to have excited state absorption (ESA) which allows gain in the 1.3 micron wavelength region;
- and
- wherein the nanoclusters are encapsulated in a low phonon energy shell to minimize energy transfer to the host matrix.
4 more elements
A fiber amplifier comprising fiber amplifier including a fiber made of an optical material that comprises:
- a silica host;
- and
- a Praseodymium dopant;
- wherein the Praseodymium atoms are configured to form nanoclusters in the silica host;
- wherein the nanoclusters are configured to have excited state absorption (ESA) which allows gain in the 1.3 micron wavelength region;
- and
- wherein the nanoclusters are encapsulated in a low phonon energy shell to minimize energy transfer to the host matrix.
4 more elements
Dependencies are inferred from the claim text.