Fluorophosphate glasses for active device

Patent metadata

Field	Value
Publication number	US-2020002218-A1
Application number	US-201816465432-A
Country	US
Kind code	A1
Filing date	May 19, 2018
Priority date	May 19, 2017
Publication date	Jan 2, 2020
Grant date	—

Abstract

The disclosed fluorophosphate glasses for an active device include: a metaphosphate composition including Al(PO 3 ) 3 ; a fluoride composition including BaF 2 and SrF 2 ; and a dopant composed of ErF 3 and YbF 3 , and have thermal and mechanical properties to be able to be used as a glass base material for an active device (e.g., optical fiber laser), have a high emission cross-section characteristic, have a reinforced upconversion and downconversion emission characteristic, and have high sensitivity S in a cryogenic environment.

First claim

What is claimed is:

1 . Fluorophosphate glasses for an active device, comprising:
a metaphosphate composition including Al(PO 3 ) 3 ; a fluoride composition including BaF 2 and SrF 2 ; and a dopant composed of ErF 3 and YbF 3 .

2 . The fluorophosphate glasses of claim 1 , wherein the YbF 3 is about 3 mol % to about 5 mol %.

3 . The fluorophosphate glasses of claim 2 , wherein the ErF 3 is about 3 mol % and the YbF 3 is about 3 mol % to about 5 mol %.

4 . The fluorophosphate glasses of claim 1 , wherein the Al(PO 3 ) 3 is about 20 mol % to about 30 mol %,
the BaF 2 is about 10 mol % to about 60 mol %, and the SrF 2 is about 10 mol % to about 70 mol %.

5 . The fluorophosphate glasses of claim 4 , wherein the Al(PO 3 ) 3 is about 20 mol %,
the BaF 2 is about 40 mol % to about 60 mol %, and the SrF 2 is about 20 mol % to about 40 mol %.

6 . The fluorophosphate glasses of claim 5 , wherein the ErF 3 is about 3 mol % and the YbF 3 is about 3 mol % to about 5 mol %.

7 . The fluorophosphate glasses of claim 4 , wherein the Al(PO 3 ) 3 is about 20 mol %,
the BaF 2 is about 60 mol %, and the SrF 2 is about 20 mol %.

8 . The fluorophosphate glasses of claim 7 , wherein the ErF 3 is about 3 mol % and the YbF 3 is about 3 mol % to about 5 mol %.

9 . The fluorophosphate glasses of claim 4 , wherein the Al(PO 3 ) 3 is about 20 mol %,
the BaF 2 is about 50 mol %, and the SrF 2 is about 30 mol %.

10 . The fluorophosphate glasses of claim 9 , wherein the ErF 3 is about 3 mol % and the YbF 3 is about 3 mol % to about 5 mol %.

11 . The fluorophosphate glasses of claim 4 , wherein the Al(PO 3 ) 3 is about 20 mol %,
the BaF 2 is about 40 mol %, and the SrF 2 is about 40 mol %.

Assignees

• Korea Photonics Tech Inst

Inventors

• Choi Ju Hyeon
• In Jung Whan
• Hwang Yeon
• Kim Young Bok

Classifications

• C03C2201/14

  containing boron and fluorine · CPC title

• C03C2201/36

  containing rare earth metals and aluminium, e.g. Er-Al co-doped · CPC title

• C03C3/247 Primary

  containing fluorine and phosphorus · CPC title

• C03C4/12

  for luminescent glass; for fluorescent glass · CPC title

• C03C2201/3488

  Ytterbium · CPC title