	US 11,874,494 B2
	Reduced diameter optical fiber with improved microbending
Scott Robertson Bickham, Corning, NY (US); Sergejs Makovejs, Manchester (GB); Pushkar Tandon, Painted Post, NY (US); and Aramais Robert Zakharian, Painted Post, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Feb. 25, 2021, as Appl. No. 17/184,909.
Claims priority of provisional application 62/991,231, filed on Mar. 18, 2020.
Claims priority of application No. 2025269 (NL), filed on Apr. 3, 2020.
Prior Publication US 2021/0294029 A1, Sep. 23, 2021
Int. Cl. G02B 6/036 (2006.01); G02B 6/02 (2006.01)

CPC G02B 6/036 (2013.01) [G02B 6/02009 (2013.01); G02B 6/02295 (2013.01)]

14 Claims

1. An optical fiber comprising:

a core region comprising silica glass doped with chlorine and/or an alkali metal; and

a cladding region surrounding the core region, the cladding region comprising an inner cladding directly adjacent to the core region, an outer cladding surrounding the inner cladding, and a trench region disposed between the inner cladding and the outer cladding in a radial direction, the trench region having a volume of about 30% Δ-micron²or greater,

wherein the optical fiber has an effective area at 1550 nm of about 100 micron²or less, and

wherein the optical fiber has a mode field diameter at 1550 nm of about 10 microns to about 10.5 microns, and

wherein the diameter of the cladding region is about 110 microns or less.