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Compound Semiconductor Integrated Photonics for Avionics

Tauke-Pedretti, Anna; Vawter, Gregory A.; Skogen, Erik J.; Alford, Charles A.; Cajas, Florante G.; Overberg, Mark E.; Peake, Gregory M.; Wendt, J.R.; Chow, Weng W.; Lentine, Anthony L.; Nelson, Jeffrey S.; Sweatt, W.C.; Jared, Bradley H.; Resnick, Paul J.; Sanchez, Carlos A.; Pipkin, Jennifer R.; Girard, Gerald R.; Nielson, Greg; Cruz-Campa, Jose L.; Okandan, Murat

Abstract not provided.

Wavelength Conversion Arrays for Optical and X-Ray Diagnostics at Z

Skogen, Erik J.; Laros, James H.; Vawter, Gregory A.; Tauke-Pedretti, Anna; Peake, Gregory M.; Alford, Charles A.; Cajas, Florante G.

Optical diagnostics play a central role in dynamic compression research. Currently, streak cameras are employed to record temporal and spectroscopic information in single-event experiments, yet are limited in several ways; the tradeoff between time resolution and total record duration is one such limitation. This project solves the limitations that streak cameras impose on dynamic compression experiments while reducing both cost and risk (equipment and labor) by utilizing standard high-speed digitizers and commercial telecommunications equipment. The missing link is the capability to convert the set of experimental (visible/x-ray) wavelengths to the infrared wavelengths used in telecommunications. In this report, we describe the problem we are solving, our approach, our results, and describe the system that was delivered to the customer. The system consists of an 8-channel visible-to-infrared converter with > 2 GHz 3-dB bandwidth.

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Selective layer disordering in intersubband Al0.028Ga0.972N/AlN superlattices with silicon nitride capping layer

Applied Physics Express

Wierer, Jonathan J.; Allerman, A.A.; Skogen, Erik J.; Tauke-Pedretti, Anna; Vawter, Gregory A.; Montano, Ines M.

Selective layer disordering in an intersubband Al0.028Ga0.972N/AlN superlattice using a silicon nitride (SiNx) capping layer is demonstrated. The SiNx capped superlattice exhibits suppressed layer disordering under high-temperature annealing. Additionally, the rate of layer disordering is reduced with increased SiNx thickness. The layer disordering is caused by Si diffusion, and the SiNx layer inhibits vacancy formation at the crystal surface and ultimately, the movement of Al and Ga atoms across the heterointerfaces. Patterning of the SiNx layer results in selective layer disordering, an attractive method to integrate active and passive III-nitride-based intersubband devices.

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Photonic integration at sandia national laboratories

Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2015

Tauke-Pedretti, Anna; Vawter, Gregory A.; Skogen, Erik J.; Alford, Charles A.; Peake, Gregory M.; Overberg, Mark E.; Cajas, Florante G.

This talk will discuss recent work on photonic integration for applications in optical signal processing, digital logic, and fundamental device research with an emphasis on InP-based photonic integrated circuit technology. © 2015 OSA.

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Cascaded double ring resonator filter with integrated SOAs

Optics InfoBase Conference Papers

Tauke-Pedretti, Anna; Vawter, Gregory A.; Skogen, Erik J.; Peake, Gregory M.; Overberg, Mark E.; Alford, Charles; Torres, David; Cajas, Florante; Kalivoda, James

We present a filter consisting of cascaded ring resonators with integrated SOAs. The filter demonstrates an extinction ratio >30 dB, a free spectral range of 56 GHz and a FWHM bandwidth of 3 GHz. © 2010 Optical Society of America.

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Mutual injection locking of monolithically integrated coupled-cavity DBR lasers

IEEE Photonics Technology Letters

Tauke-Pedretti, Anna; Vawter, Gregory A.; Skogen, Erik J.; Peake, Gregory M.; Overberg, Mark E.; Alford, Charles A.; Chow, Weng W.; Yang, Zhenshan Y.; Torres, David; Cajas, Florante

We present a photonic integrated circuit (PIC) composed of two strongly coupled distributed Bragg reflector (DBR) lasers. This PIC utilizes the dynamics of mutual injection locking to increase the relaxation resonance frequency from 3 GHz to beyond 30 GHz. Mutual injection-locking and external injection-locking operation are compared. © 2011 IEEE.

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Results 1–25 of 69
Results 1–25 of 69