4×4 nonblocking integrated acousto-optic space switch

Tsai, C.S.; Le, P.

doi:10.1063/1.106625

Cited by 19 publications

(8 citation statements)

References 19 publications

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“…Optical guided wave devices with acousto-optical interaction are of immense utility in high-speed signal processing operations, optical computers and wide-band optical communication. A wide variety of acousto-optical devices, such as acousto-optical deflectors [1], switches [2], tunable filters [3] and modulators [4] based on bulk photorefractive single crystals (LiNbO 3 ), chalcogenide glasses [5] and thin film layered structures, is being investigated. The layered structures have attracted considerable attention because of their potential for fabricating integrated acousto-optical devices.…”

Section: Introductionmentioning

confidence: 99%

Studies on acousto-optical interaction in epitaxial thin film heterostructures

Nayak¹,

Gupta²,

Sreenivas³

1999

J. Phys. D: Appl. Phys.

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Thin film epitaxial heterostructures consisting of SrTiO 3 /BaTiO 3 /SrTiO 3 and SrTiO 3 /BaTiO 3 /SrTiO 3 /Si have been studied theoretically with interdigital transducer (IDT) electrodes at various locations. The thickness of each individual layer has been optimized for achieving an efficient SAW performance with a high electromechanical coupling coefficient. The structural feasibility and practical implications of various device configurations for an acousto-optical device are discussed. The introduction of a thin non-piezoelectric SrTiO 3 over-layer onto a piezoelectric BaTiO 3 film is found to enhance the electromechanical coupling coefficient (k 2 ). In a symmetrical SrTiO 3 /IDT/BaTiO 3 /SrTiO 3 waveguide structure the maximum value of k 2 is found to increase from 2.438 to 9.23% for a variation in the thickness of the SrTiO 3 over-layer in the range 0-0.12λ. Symmetrical and asymmetrical waveguide structures formed with SrTiO 3 and BaTiO 3 thin films in combination have been examined and a symmetrical waveguide structure (SrTiO 3 /IDT/BaTiO 3 /SrTiO 3 /Si) is found to exhibit a high acousto-optical figure of merit M = 57 × 10 −15 s 3 kg −1 and k 2 = 1.96% for a device operating with the fundamental mode at wavelength λ = 8 µm.

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Section: Introductionmentioning

confidence: 99%

Studies on acousto-optical interaction in epitaxial thin film heterostructures

Nayak¹,

Gupta²,

Sreenivas³

1999

J. Phys. D: Appl. Phys.

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“…The spatial separation of the WG arms was chosen to be 1.5λ SAW (i.e. by an odd multiple -3-of λ SAW /2) to ensure that the arms were modulated with opposite phase by a traveling SAW as in [74] (see (19)). The latter was generated by a regular IDT with a design wavelength of λ SAW = 5.6 µm (corresponding to f SAW ≈ 520 MHz).…”

Section: Multiple-output Interferometersmentioning

confidence: 99%

“…In this way, first integrated acousto-optic devices were mainly based on Bragg diffraction of guided light beams by SAW beams in 2D slab optical WGs. A whole class of integrated acousto-optical devices devices, such as light modulators [17,18] or light switches [19,20], were demonstrated during the first years. A great number of these devices have been fabricated in LiNbO 3 and to a lesser degree, semiconductor materials such as GaAs.…”

Section: Introductionmentioning

confidence: 99%

Semiconductor optical waveguide devices modulated by surface acoustic waves

Crespo-Poveda¹,

Bühler²,

Sáez³

et al. 2019

J. Phys. D: Appl. Phys.

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This paper reviews the application of coherent acoustic phonons in the form of surface acoustic waves to control the response of semiconductor optical waveguide devices. We lay special emphasis on devices built upon three-dimensional rectangular waveguides, which offer excellent possibilities for integration due to the stronger confinement of the optical fields. We address the spatial distribution of the acoustic fields, as well as the excitation of surface acoustic waves in piezoelectric materials using interdigital transducers. The mechanisms responsible for the interaction between light and the acoustic modes in the optical waveguides, as well as the influence of waveguide parameters in the performance of the devices, are also discussed. Finally, we review the most important advances on the modulation of semiconductor optical waveguide devices built upon three-dimensional waveguides, and explore several exciting future technological possibilities. These include, among others, the generation of slow light in photonic crystal waveguides to enhance the sound-light interaction in the reviewed devices.

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“…3 It is clear that the integrated AO device module just described can perform baseband frequency modulation as well as frequency shifting of a light wave. The resulting baseband integrated AO frequency shifter module was designed to operate at the optical wavelength of 1.…”

Section: Frequency Shifter and Modulatormentioning

confidence: 99%

<title>Integrated acousto-optic circuits for communications, signal processing, and computing</title>

Tsai

1992

SPIE Proceedings

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ABSThACFThere has been a number of significant advances in recent years in the conception and realization of new and novel guided-wave acoustooptic (AO) devices and related integration technologies in common waveguide substrates.In this paper, a selective review of the most recent advances in the realization of multi-channel integrated AO modules or circuits in LiNbO3 and GaAs substrates with applications to communications, RF signal processing and computing is presented. INTRODUCHONIntegrated Acustooptics involving Bragg diffraction ofguided-opticalwaves (GOW) from surface acoustic waves 182

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4×4 nonblocking integrated acousto-optic space switch

Cited by 19 publications

References 19 publications

Studies on acousto-optical interaction in epitaxial thin film heterostructures

Studies on acousto-optical interaction in epitaxial thin film heterostructures

Semiconductor optical waveguide devices modulated by surface acoustic waves

<title>Integrated acousto-optic circuits for communications, signal processing, and computing</title>

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