Scalable Wavelength-Converting Crossbar Switches

Abstract

Abstract-We report scalable low-power wavelength-converting crossbar switches that monolithically integrate two-dimensional compact arrays of surface-normal photodiodes with quantum-well waveguide modulators. We demonstrate proof-of-concept, electrically reconfigurable 2 2 crossbars that perform unconstrained wavelength conversion across 35 nm in the -band (1530-1565 nm), using only 4.3-mW absorbed input optical power, and with 10-dB extinction ratio at 1.25 Gb/s. Such wavelength-converting crossbars provide complete flexibility to selectively convert any of the input wavelengths to any of the output wavelengths at high data bit rates in telecommunication, with the input and output wavelengths being arbitrarily chosen within the -band.

Violet to deep-ultraviolet InGaN∕GaN and GaN∕AlGaN quantum structures for UV electroabsorption modulators

“…[18][19][20] We use RIE to etch down to the middle of n layer to define device mesas, as illustrated in Fig. 1.…”

Photovoltaic nanocrystal scintillators hybridized on Si solar cells for enhanced conversion efficiency in UV

“…The reasons for blending nanocrystals in a very small amount of polymeric solution include obtaining a high film quality and a sharp edge in the optical absorption spectra of the resulting nanocrystal-polymer thin film. To fabricate our samples, we use standard fabrication techniques similar to those developed and described in our previous optoelectronics device work [17][18][19][20][32][33][34][35]. We prepare the nanocrystal-polymer films on our samples on the hot plate (at 50 °C) to achieve uniform films.…”

Single ultrafast diffusive conduction based optoelectronic switch for multi-channel operation

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Abstract: For multi-channel optical switching, we report single ultrafast diffusive conduction based optoelectronic switches that accommodate >100 optical channels (with 2,000mm -2 channel density and <10% crosstalk), on 300µm×300µm devices with switching bandwidths of >50GHz.Ultrafast all-optical switching has been extensively investigated and different types of photonic switches have been successfully demonstrated [1][2][3][4][5][6]. Such optical switches hold great promise for a wide range of high-speed applications that extend from optical wavelength conversion [1] to optical regeneration [2].

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“…Ultrafast all-optical switching has been extensively investigated and different types of photonic switches have been successfully demonstrated [1][2][3][4][5][6]. Such optical switches hold great promise for a wide range of high-speed applications that extend from optical wavelength conversion [1] to optical regeneration [2].…”

“…Such optical switches hold great promise for a wide range of high-speed applications that extend from optical wavelength conversion [1] to optical regeneration [2]. Such applications typically require arrays of switches, where a large number of optical channels need to be brought together into a small volume and switched within such limited space [3]. However, it is technically challenging to incorporate a large number of switches into an array integrated on a chip scale and to meet the requirements of such demanding multi-channel applications.…”