Brillouin scattering in thin‐film waveguides
TL;DR: In this article, the Brillouin component was observed for the first time along the backscattered m lines in the anisotropic film waveguides and each order of the forward as well as the backward lines were found to be split into two components and attributed to the presence of TE and TM modes.
Abstract: Brillouin component is observed for the first time along the backscattered m lines in the anisotropic film waveguides. Each order of the forward as well as the backscattered m lines is found to be split into two components and are attributed to the presence of TE and TM modes. Temperature conditions under which the films are made and the thickness of the films are found to be critical. Polystyrene films are used in the investigations as waveguide materials due to their compatibility.
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Proceedings Article•
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TL;DR: In this paper, the main theoretical and experimental developments to date in Integrated Optics are reviewed, including material considerations, guiding mechanisms, modulation, coupling and mode losses, as well as the fabrication and applications of periodic thin film structures.
Abstract: In order to enable optical systems to operate with a high degree of compactness and reliability it is necessary to combine large number of optical functions in small monolithic structures. A development, somewhat reminiscent of that that took place in Integrated Electronics, is now beginning to take place in optics. The initial challenge in this emerging field, known appropriately as "Integrated Optics", is to demonstrate the possibility of performing basic optical functions such as light generation, coupling, modulation, and guiding in Integrated Optical configurations. The talk will review the main theoretical and experimental developments to date in Integrated Optics. Specific topics to be discussed include: Material considerations, guiding mechanisms, modulation, coupling and mode losses. The fabrication and applications of periodic thin film structures will be discussed.
786 citations
TL;DR: In this article, an account of Brillouin scattering on thin dip-coated polystyrene waveguides has been given and the behavior of the waveguide near the Bragg region is discussed.
Abstract: An account of Brillouin scattering on thin dip‐coated polystyrene waveguides has been given. The behavior of the waveguide near the Bragg region is discussed. The Brillouin scattering observed in dip‐coated polystyrene films is attributed to the corrugations in the waveguide due to stress birefringence.
3 citations
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Proceedings Article•
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TL;DR: In this paper, the main theoretical and experimental developments to date in Integrated Optics are reviewed, including material considerations, guiding mechanisms, modulation, coupling and mode losses, as well as the fabrication and applications of periodic thin film structures.
Abstract: In order to enable optical systems to operate with a high degree of compactness and reliability it is necessary to combine large number of optical functions in small monolithic structures. A development, somewhat reminiscent of that that took place in Integrated Electronics, is now beginning to take place in optics. The initial challenge in this emerging field, known appropriately as "Integrated Optics", is to demonstrate the possibility of performing basic optical functions such as light generation, coupling, modulation, and guiding in Integrated Optical configurations. The talk will review the main theoretical and experimental developments to date in Integrated Optics. Specific topics to be discussed include: Material considerations, guiding mechanisms, modulation, coupling and mode losses. The fabrication and applications of periodic thin film structures will be discussed.
786 citations
TL;DR: In this article, the authors report theory and experiment on modes of propagating light waves in deposited semiconductor films, where the modes are excited by a prism-film coupler which is also used for the measurement of their phase velocities.
Abstract: We report theory and experiment on modes of propagating light waves in deposited semiconductor films. The modes are excited by a novel prism‐film coupler which is also used for the measurement of their phase velocities. Up to 50% of the incident laser energy has been fed into a single mode of propagation. The positions and linewidths of the modes, the wave intensity inside the film, and a dramatic view of the mode spectrum displayed by the scattered light are discussed in detail.
751 citations
TL;DR: In this article, a theory of the prism-film coupler is presented, and the physical principles involved are illustrated by a method that combines wave and ray optics, where the modes in the thin-film light guide and their modification by the effect of coupling are studied.
Abstract: A prism–film coupler has been discussed recently by Tien, Ulrich, and Martin as a device to couple efficiently a laser beam into thin-film dielectric light guides. This coupler also allows an accurate measurement of the spectrum of propagating modes from which the refractive index and the thickness of the film can be determined. We present here a theory of the prism–film coupler. The physical principles involved are illustrated by a method that combines wave and ray optics. We study the modes in the thin-film light guide and their modification by the effect of coupling. We also calculate the field distributions in the prism and the film, the power transfer between the prism and the film, and derive a condition of optimum operation. In one example, 81% of the laser power can be fed into any desired mode of propagation in the film.
733 citations
TL;DR: In this article, backward stimulated Brillouin scattering (SBS) in glass optical fibers has been observed with less than 1 W of input power at 5355 A. Experimental results are compared with theory, and the implied limitation to optical fiber transmission is discussed.
Abstract: Observations of backward stimulated Brillouin scattering (SBS) in glass optical fibers are reported. Threshold for SBS has been achieved with less than 1 W of input power at 5355 A. Relaxation behavior in the SBS signal has also been observed and is attributed to finite‐cell‐length oscillation. Experimental results are compared with theory, and the implied limitation to optical fiber transmission is discussed.
655 citations
554 citations