Acousto-optic photonic crossbar switch Part I: design

Abstract

We present the design of a 12 × 12 photonic crossbar interconnection network constructed using a single three-dimensional acousto-optic crystal. Previous crossbars based on bulk acousto-optic cells require multichannel deflectors with one deflector per optical input; in contrast the design presented here angularly multiplexes these independent deflectors into a single-transducer acousto-optic device. A Fourier-optics analysis of an acoustically lossy Bragg deflector is coupled to a momentum-space analysis that permits the derivation of complete design equations for the switch. As a concrete example, the complete design of a 12 × 12 crossbar is presented. Finally, a coupled-mode analysis of the first- and second-order diffractions in the angularly multiplexed Bragg cell reveals the fundamental efficiency bounds of the switching network.

Doppler-free, multiwavelength acousto-optic deflector for two-photon addressing arrays of Rb atoms in a quantum information processor

“…The resulting 3 dB rippled acousto-optic bandshape is as illustrated in Figure 2 c). 20,23 For our AOD beam scanner design, we chose TeO 2 as our AO crystal because of its anomalous slow shear mode with high diffraction efficiency and high resolution when compared to other crystals (e.g., GaP or LiNbO 3 ). 24 Using the stiffness tensor coefficients of the TeO 2 crystal, the directional dependent acoustic velocity can be determined from the eigensolution of the Christoffel equation.…”

<title>Rapid reconfiguration in an acousto-optic crossbar interconnection network</title>

“…4 shows the operation of one of these prism pairs. The magnification of the pair: M (cos 012 cosO22" \ cos0 cos 021) (1) is only dependent upon the angles of refraction 023, calculated from Snells law. In our 12x12 AOPC, the required magnification to properly fit the 45 mm wide beam to the 6.5 mm high transducer is 1/7.…”