Journal ArticleDOI
Tapered waveguides for guided wave optics.
TLDR
Strip waveguides having half-paraboloid shaped tapers that permit efficient fiber to waveguide coupling have been fabricated by Ag ion exchange in soda-lime glass with a reduction in the input coupling loss has been accomplished by tailoring the diffusion.Abstract:
Strip waveguides having half-paraboloid shaped tapers that permit efficient fiber to waveguide coupling have been fabricated by Ag ion exchange in soda-lime glass. A reduction in the input coupling loss has been accomplished by tailoring the diffusion to provide a gradual transition from a single-mode waveguide to a multimode waveguide having cross-sectional dimensions comparable to the core diameter of a single-mode fiber. Waveguides without tapers exhibit an attenuation of 1.0 dB/cm and an input coupling loss of 0.6 dB. The additional loss introduced by the tapered region is 0.5 dB. By way of contrast, an input coupling loss of 2.4 dB is obtained by coupling directly to a single-mode waveguide, indicating a net improvement of 1.3 dB for the tapered waveguides.read more
Citations
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Journal ArticleDOI
Ion-exchanged glass waveguide technology: a review
TL;DR: A review of the history and current status of ion exchanged glass waveguide technology is given in this article, where an overview of fabrication, characterization and modeling of waveguides is given and the most important waveguide devices and their applica- tions are discussed.
Journal ArticleDOI
Superposed Kuznetsov-Ma solitons in a two-dimensional graded-index grating waveguide
Chao-Qing Dai,Hai-Ping Zhu +1 more
TL;DR: In this article, the authors used the National Natural Science Foundation of China (NNF) and the Zhejiang Provincial Natural Sciences Foundation (ZPNF) to support the work of the authors.
Journal ArticleDOI
Beam propagation in tapered quadratic-index waveguides: Analytical solutions
Lee W. Casperson,J. Kirkwood +1 more
TL;DR: In this paper, a Gaussian beam of light propagating through a quadratic lenslike medium remains Gaussian, even if all of the parameters of the medium vary along the propagation path.
Journal ArticleDOI
Constant-width variable-index transition for efficient Ti:LiNbO 3 waveguide-fiber coupling
P. Suchoski,R. Ramaswamy +1 more
TL;DR: In this paper, a constant-width variable-index transition has been developed that allows for both low-loss fiber-waveguide coupling and efficient device operation on the same lithium niobate chip.
Journal ArticleDOI
Controlling optical similaritons in a graded-index nonlinear waveguide by tailoring of the tapering profile
TL;DR: In this article, the effect of different tapering profiles, on the intensity of optical similaritons, in a graded-index nonlinear waveguide is studied. And the authors illustrate the procedure to tailor sech2-type and parabolic taper profiles of such non-linear waveguides.
References
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Journal ArticleDOI
Optical waveguides formed by thermal migration of ions in glass.
TL;DR: The ion-exchange process has proved to be a simple means for fabricating tapered-edge couplers and low loss films can be fabricated using this process and the modal losses in these films do not agree with those losses predicted by existing theories.
Journal ArticleDOI
Planar optical waveguides formed by silver-ion migration in glass
TL;DR: In this paper, a detailed study has been carried out on the propagation-mode characteristics of graded-index planar optical waveguides formed by silver-sodium ion exchange, and it has been found that the index profile can be accurately modeled by a monotonic decrease from a maximum value at the surface, following a second-order polynomial distribution.
Journal ArticleDOI
Optical waveguide parabolic coupling horns
TL;DR: In this paper, a parabolic shape is proposed to provide adiabatic transition regions between wide and narrow-channel optical waveguides, which is consistent with diffraction theory in the wide-channel limit.
Journal ArticleDOI
Coupling optical waveguides by tapers
TL;DR: The coupling of single-mode optical waveguides through the use of expanding and contracting tapers is examined theoretically, and a tradeoff is found to exist, that is, widening the guide by means of a taper leads to less critical coupling tolerances for transverse displacements, but tighter tolerance for angular misalignment.
Journal ArticleDOI
Coupling from Multimode to Single-Mode Linear Waveguides Using Horn-Shaped Structures
R.K. Winn,J.H. Harris +1 more
TL;DR: In this article, the authors investigated coupling from a multimode to a single-mode linear waveguide using horn-shaped structures and obtained a coupling efficiency in excess of 90 percent.