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P. Patra

Bio: P. Patra is an academic researcher. The author has contributed to research in topics: Bessel function & Graded-index fiber. The author has an hindex of 2, co-authored 2 publications receiving 15 citations.

Papers
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Journal ArticleDOI
14 Apr 2008-Optik
TL;DR: In this paper, the authors presented analytical expressions for first higher order modal field as well as cladding decay parameter in the case of graded index fiber using a series expansion method involving the Chebyshev technique.

15 citations

Journal ArticleDOI
15 Sep 2008-Optik
TL;DR: In this article, the first theoretical investigation of the coupling efficiency of a laser diode to a single-mode fiber via a hemispherical microlens on the elliptical core fiber tip in presence of possible transverse and angular misalignments is presented.

8 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors summarized the key technologies of a single mode fiber coupling to a laser diode and its direction of development in the future, and focused on optimizing the optical structure and the coupling parameters to improve the coupling efficiency and packaging performance.

16 citations

Journal ArticleDOI
TL;DR: In this article, a simple iterative method involving Chebyshev formalism is proposed to evaluate the first higher order modal field for dual-mode optical fiber having step and parabolic index profiles.
Abstract: Abstract We report evaluation of first higher order modal field for dual mode optical fiber having step and parabolic index profiles. The study is carried out both in absence as well as in presence of Kerr nonlinearity. The analysis is based on a simple iterative method involving Chebyshev formalism. Taking some typical step- and parabolic-index fibers as examples, we show that our results agree excellently with the exact results which can be obtained by applying rigorous methods. Thus, our simple formalism stands the merit of being considered as an accurate alternative to the existing cumbersome methods. The prescribed formalism provides scope for accurate estimation of different propagation parameters associated with first higher order mode in such kinds of fibers in presence of Kerr nonlinearity. The execution of formalism being user friendly, it will be beneficial to the system engineers working in the field of optical technology.

16 citations

Journal ArticleDOI
01 Sep 2018-Optik
TL;DR: In this paper, the authors present a theoretical analysis of the coupling efficiency of a laser diode to a single-mode triangular index fiber coupling via upside-down tapered hemispherical microlens on the tip of the fiber in presence of possible transverse and angular offsets.

14 citations

Journal ArticleDOI
01 Jul 2014-Optik
TL;DR: In this article, the formulated ABCD matrix formalism is employed to prescribe analytical expression of coupling efficiency of a laser diode to single-mode circular core dispersion-shifted as well as dispersionflattened fiber via hyperbolic microlens on the tip of the fiber.

11 citations

Journal ArticleDOI
01 Feb 2011-Optik
TL;DR: In this paper, the authors present simple but accurate analytical expressions for the fractional modal power guided inside the core, the excitation efficiency of the mode by uniform light source and Petermann I and II spot sizes as well in case of graded index fiber.

8 citations