Patent
Reduction of bend loss through constraint of optical fiber parameters
TLDR
In this article, a method of assembling an optical system includes the steps of: (i) selecting, from a plurality of optical fibers characterized by a common nominal cut-off wavelength λcn and an actual cutoff length λc such that the cutoff wavelength of each one of this plurality of fibers is the same as the nominal cut off wavelength or differs slightly from the nominal cutoff length due to manufacturing tolerances, only fibers with λ c>λmin, where λmin is a predetermined minimum acceptable cutoff wavelengths of the selected fibers; and (ii)Abstract:
A method of assembling an optical system includes the steps of: (i) selecting, from a plurality of optical fibers characterized by a common nominal cut-off wavelength λcn and an actual cut-off wavelength λc such that the cut-off wavelength λc of each one of this plurality of fibers is the same as the nominal cut-off wavelength λcn or differs slightly from the nominal cut-off wavelength due to manufacturing tolerances, only fibers with λc>λmin, where λmin is a predetermined minimum acceptable cut-off wavelength of the selected fibers; and (ii) bending at least one section of at least one of these selected fibers such that this bent section has a bend radius R, where 12 mm<R<18 mm.read more
Citations
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Patent
Low bend loss optical fiber
TL;DR: In this paper, an optical fiber with a Young's modulus of less than 1.0 MPa and a glass transition temperature less than −25° C is presented, and the secondary coating has a Young modulus greater than 1200 MPa.
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Large-mode-area optical fibers with reduced bend distortion
TL;DR: In this article, the authors proposed a method of making LMA optical fiber with a grading depth of Δn g, as measured from a central maximum at or near the axis to a lower level that is not greater than the central maximum and not less than the index of the cladding region.
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Optical fiber with specialized index profile to compensate for bend-induced distortions
TL;DR: The as-fabricated profile as mentioned in this paper is defined as a "pre-distorted" profile that takes into account the gradient introduced by bending the fiber, and is used to improve the effective area of the inventive fiber.
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TL;DR: In this paper, a low-profile packaged FPGA integrated circuit includes a die-bonded assembly disposed within a co-fired multilayer ceramic integrated circuit package.
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TL;DR: In this paper, a single-mode optical fiber that propagates an optical signal at a wavelength of 1310 nm, in singlemode operation, has a mode field diameter of 6.6 μm or more at the wavelength of 1410 nm; and a macro bending loss of at most 0.1 dB/10 turns with a bending radius of 7.5 mm at a length of 1650 nm.
References
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Journal ArticleDOI
Curvature loss formula for optical fibers
TL;DR: In this article, the curvature loss for optical fibers with constant radius of curvature of their axes is derived by expressing the field outside of the fiber in terms of a superposition of cylindrical outgoing waves.
Journal ArticleDOI
Field deformation and loss caused by curvature of optical fibers
TL;DR: In this paper, a theoretical evaluation of curvature losses of a step-index fiber with a bent axis incorporating the influence of field deformation on the loss coefficient is presented, and the limitations of the simple loss formula in case of a sharply bent overmoded waveguide are pointed out.
Journal ArticleDOI
Influence of curvature on the losses of doubly clad fibers
TL;DR: For typical fibers the leakage loss of the HE(11) mode begins to increase significantly when the radius of curvature of the fiber axis reaches the 1-10-cm range.
Journal ArticleDOI
Bending effects in optical fibers
TL;DR: In this article, the authors analyzed the coupling at bends in optical fibers supporting one or only a few guided modes by considering the local normal modes for the corresponding straight waveguide and determined the correction to these matrix elements due to the longitudinal strain in a bent fiber.
Journal ArticleDOI
Bend loss in single-mode fibers
L. Faustini,Giuseppe Martini +1 more
TL;DR: In this paper, the results of extensive single-radius bend loss measurements for two different fibers over wide ranges of wavelength (800-1600 nm) and curvature radius (13.5-27.5 mm).