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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9431788 B1

PDFFull Text
Date of Patent:
Aug. 30, 2016

Filed:

Mar. 27, 2015

Mode converter for high power, higher-order mode optical fiber amplifiers

Applicant:

Ofs Fitel, Llc, Norcross, GA (US);

Inventor:

Jeffrey W Nicholson, Warren, NJ (US);

Assignee:

OFS FITEL, LLC, Norcross, GA (US);

Attorney:

Wendy W. Koba, Esq.

Primary Examiner:

Eric Bolda

Int. Cl.
CPC ...
G02B 6/26 (2006.01); G02B 5/18 (2006.01); G02B 6/02 (2006.01); H01S 3/067 (2006.01); G02B 27/46 (2006.01); H01S 3/091 (2006.01); G02B 6/32 (2006.01); G02B 6/34 (2006.01); G02B 27/00 (2006.01); G02B 6/14 (2006.01);
U.S. Cl.
CPC ...
H01S 3/06754 (2013.01); G02B 6/262 (2013.01); G02B 6/268 (2013.01); G02B 6/32 (2013.01); G02B 6/34 (2013.01); G02B 27/0012 (2013.01); G02B 27/46 (2013.01); H01S 3/06708 (2013.01); H01S 3/091 (2013.01); G02B 6/14 (2013.01);
Abstract

A mode converter for use with a higher-order mode (HOM)-based fiber amplifiers takes the form of axicon-based configuration that is able to convert high power (tens of mW and higher) optical signals propagating in higher-order mode form into a diffraction-limited beam without experiencing the nonlinear effects (such as self-phase modulation) that are found when using a long-period grating (LPG) to create a diffraction-limited beam by performing mode conversion. The axicon may comprise a bulk optic device, a fiber-based device, or a GRIN-based configuration (where the refractive index profile of the GRIN element is formed to create a diffraction-limited signal).

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