Title: Fiber optic coupler exhibiting low nonadiabatic loss
Application Number: 95104698 Application Date: 1995.05.04
Publication Number: 1120172 Publication Date: 1996.04.10
Approval Pub. Date: 2001.10.10 Granted Pub. Date: 2001.10.10
International Classifi-cation: G02B6/28
Applicant(s) Name: Corning Incorporated Address:
Inventor(s) Name: David L. Werdman;Jr. Donald R. Young
Attorney & Agent: SHEN ZHAOKUN
Abstract:
    A optical fiber coupler comprises a plurality of single-mode optical fibers, each of which is tapered to form a small diameter section that extends in contiguous relationship with the small diameter sections of the other fibers to form a coupling region. Each of the fibers has a core surrounded by a cladding of refractive index lower than that of the core. At least one of the fibers has a refractive index pedestal of refractive index ni between said core and cladding, wherein n1
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