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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 7 — Mar. 1, 2005
  • pp: 1270–1282

Small-focus integral fiber lenses: modeling with the segmented beam-propagation method and near-field characterization

Noel Axelrod, Aaron Lewis, Nissim Ben Yosef, Rima Dekhter, Galina Fish, and Alexander Krol  »View Author Affiliations


Applied Optics, Vol. 44, Issue 7, pp. 1270-1282 (2005)
http://dx.doi.org/10.1364/AO.44.001270


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Abstract

Tapered- and straight-core fiber microlenses of hyperbolic shape are studied with the segmented beam propagation method (Se-BPM). This new formulation extends to a large scale the finite-difference time-domain method for calculating propagation of the wave field in guiding systems. It is based on partitioning an entire computational domain into subdomains along the direction of propagation. The Helmholtz equation can be solved directly for each subdomain, and an iterative procedure is used to propagate the field from one subdomain to another. The Se-BPM is compared with other approaches that are commonly used to analyze straight-core fiber microlen devices in the paraxial approximation. We deal mainly with small-spot-size fiber microlenses where this approximation does not apply. We show that the emergent beam is not Gaussian in the far field. Instead of the usual far-field characterization we propose a near-field characterization of the fiber microlens. This is possible with the near-field scanning optical microscopy technique.

© 2005 Optical Society of America

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2310) Fiber optics and optical communications : Fiber optics
(130.0130) Integrated optics : Integrated optics
(230.7370) Optical devices : Waveguides
(350.5500) Other areas of optics : Propagation

History
Original Manuscript: February 2, 2004
Revised Manuscript: July 20, 2004
Manuscript Accepted: August 3, 2004
Published: March 1, 2005

Citation
Noel Axelrod, Aaron Lewis, Nissim Ben Yosef, Rima Dekhter, Galina Fish, and Alexander Krol, "Small-focus integral fiber lenses: modeling with the segmented beam-propagation method and near-field characterization," Appl. Opt. 44, 1270-1282 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-7-1270

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