A detailed structure light fiber which has a large caliber core and the smoothed dominant mode, its manufacturing method, and its directions in laser micro processing - INSERM(INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE)

Title:

A detailed structure light fiber which has a large caliber core and the smoothed dominant mode, its manufacturing method, and its directions in laser micro processing

Document Type and Number:

Japanese Patent JP6121426

Kind Code:

B2

Abstract:

The fiber comprises a core (2) having an index N and diameter of 10 μm or more, surrounded by a ring (4) having an index N+Δn and thickness ΔR, and cladding (6) surrounding the ring and comprising for example air gaps (8). According to the invention: Δn≧10−3 and ΔR=α/(Δn)β [1] where: 5×10−4 μm≰α≰5×10−2 μm and 0.5≰β≰1.5. The numbers α and β are dependent on the wavelength λ of the light guided by the fiber, the number of missing gaps therein, the diameter d of the gaps, the spacing Λ thereof and N. To design the fiber, λ, the number of missing gaps, d/Λ, the core doping content, Λ and Δn are chosen; and ΔR is determined using equation [1] so as to obtain a flattened fundamental mode.

Inventors:

Yugono Emmanuel
Lago roll
Muso Arnaud
Kiken Poi Eve
Bumman Jero
Bigo Laurent
Valentin Constance

Application Number:

JP2014530273A

Publication Date:

April 26, 2017

Filing Date:

September 18, 2012

Export Citation:

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Assignee:

INSERM(INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE)
Universite Reel 1 Chronicle Technology
Center National D'Orcharsh Chillon Tiffic

International Classes:

G02B6/02; B23K26/064; G02B6/032

Domestic Patent References:

JP2000111753A
JP2004077891A
JP2007522497A

Foreign References:

US20040247272
WO2011031704A1
US20040156608

Attorney, Agent or Firm:

Shinei Patent Office

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