Publications

39 Results
Skip to search filters

High-Brightness Ultraviolet Lasers for Leap-Ahead National Security Applications

Skogen, Erik J.; Fortuna, S.A.; Allerman, A.A.; Smith, Michael; Alford, Charles A.; Crawford, Mary H.

In this project we endeavored to improve the state-of-the-art in UV lasers diodes. We made important advancements in several fronts from modeling, to epitaxial growth, to fabrication, and testing. Throughout the project it became clear that polarization doping would be able to help advance the state of laser diode design in terms of electrical performance, but the optical design would need to be investigated to ensure that a 2D guided mode would be supported. New capability in optical modeling using commercial software demonstrated that the new polarization doped structures would be viable. New capability in pulsed testing was established to reach the current and voltage required. Our fabricated devices had some parasitic electrical paths which hindered performance that we were ultimately unable to overcome in the project timeframe. We do believe that future projects will be able to leverage the advancements made under this project.

More Details

Heterogeneous Integration of Silicon Electronics and Compound Semiconductor Optoelectronics for Miniature RF Photonic Transceivers

Nordquist, Christopher N.; Skogen, Erik J.; Fortuna, S.A.; Hollowell, Andrew E.; Hemmady, Caroline S.; Saugen, J.M.; Forbes, T.; Wood, Michael G.; Jordan, Matthew J.; McClain, Jaime L.; Lepkowski, Stefan M.; Alford, Charles A.; Peake, Gregory M.; Pomerene, Andrew P.; Long, Christopher M.; Serkland, Darwin K.; Dean, Kenneth A.

Abstract not provided.

A COLD ATOM INTERFEROMETRY SENSOR PLATFORM BASED ON DIFFRACTIVE OPTICS AND INTEGRATED PHOTONICS

Lee, Jongmin L.; McGuinness, Hayden J.; Soh, Daniel B.; Christensen, Justin C.; Ding, Roger D.; Finnegan, Patrick S.; Hoth, Gregory W.; Kindel, William K.; Little, Bethany J.; Rosenthal, Randy R.; Wendt, Joel R.; Lentine, Anthony L.; Eichenfield, Matthew S.; Gehl, M.; Kodigala, Ashok; Siddiqui, Aleem M.; Skogen, Erik J.; Vawter, Gregory A.; Ison, Aaron M.; Bossert, David B.; Fuerschbach, Kyle H.; Gillund, Daniel P.; Walker, Charles A.; De Smet, Dennis J.; Brashar, Connor B.; Berg, Joseph B.; Jhaveri, Prabodh M.; Smith, Tony G.; Kemme, S.A.; Schwindt, Peter S.; Biedermann, Grant B.

Abstract not provided.

Heterogeneous integration of silicon electronics and compound semiconductor optoelectronics for miniature rf photonic transceivers

ECS Transactions

Nordquist, C.D.; Skogen, Erik J.; Fortuna, S.A.; Hollowell, Andrew E.; Hemmady, C.S.; Saugen, J.M.; Forbes, T.; Wood, M.G.; Jordan, Matthew J.; McClain, Jaime L.; Lepkowski, Stefan M.; Alford, Charles A.; Peake, Gregory M.; Pomerene, Andrew P.; Long, C.M.; Serkland, Darwin K.; Dean, Kenneth A.

Heterogeneous Integration (HI) may enable optoelectronic transceivers for short-range and long-range radio frequency (RF) photonic interconnect using wavelength-division multiplexing (WDM) to aggregate signals, provide galvanic isolation, and reduce crosstalk and interference. Integration of silicon Complementary Metal-Oxide-Semiconductor (CMOS) electronics with InGaAsP compound semiconductor photonics provides the potential for high-performance microsystems that combine complex electronic functions with optoelectronic capabilities from rich bandgap engineering opportunities, and intimate integration allows short interconnects for lower power and latency. The dominant pure-play foundry model plus the differences in materials and processes between these technologies dictate separate fabrication of the devices followed by integration of individual die, presenting unique challenges in die preparation, metallization, and bumping, especially as interconnect densities increase. In this paper, we describe progress towards realizing an S-band WDM RF photonic link combining 180 nm silicon CMOS electronics with InGaAsP integrated optoelectronics, using HI processes and approaches that scale into microwave and millimeter-wave frequencies.

More Details

DEPLOYABLE COLD ATOM INTERFEROMETRY SENSOR PLATFORMS BASED ON DIFFRACTIVE OPTICS AND INTEGRATED PHOTONICS

Lee, Jongmin L.; Biedermann, Grant B.; McGuinness, Hayden J.; Soh, Daniel B.; Christensen, Justin C.; Ding, Roger D.; Finnegan, Patrick S.; Hoth, Gregory W.; Kindel, Will K.; Little, Bethany J.; Rosenthal, Randy R.; Wendt, J.R.; Lentine, Anthony L.; Eichenfield, Matthew S.; Gehl, M.; Kodigala, Ashok; Siddiqui, Aleem M.; Skogen, Erik J.; Vawter, Gregory A.; Ison, Aaron M.; Bossert, David B.; Fuerschbach, Kyle H.; Gillund, Daniel P.; Walker, Charles A.; De Smet, Dennis J.; Brashar, Connor B.; Berg, Joseph B.; Jhaveri, Prabodh M.; Smith, Tony G.; Kemme, S.A.; Schwindt, Peter S.

Abstract not provided.

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 N.; Cruz-Campa, Jose L.; Okandan, Murat O.

Abstract not provided.

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

Skogen, Erik J.; Dolan, Daniel 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.

More Details

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

Applied Physics Express

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

We demonstrate the selective layer disordering in intersubband Al0.028Ga0.972 N/AlN superlattices using a silicon nitride (SiNx) capping layer. The (SiNx) capped superlattice exhibits suppressed layer disordering under high-temperature annealing. In addition, 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. In conclusion, patterning of the SiNx layer results in selective layer disordering, an attractive method to integrate active and passive III–nitride-based intersubband devices.

More Details

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.; Overberg, Mark E.; Peake, Gregory M.; 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.

More Details

Layer disordering and doping compensation of an intersubband AlGaN/AlN superlattice by silicon implantation

Applied Physics Letters

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

Layer disordering and doping compensation of an Al0.028Ga0.972N/AlN superlattice by implantation are demonstrated. The as-grown sample exhibits intersubband absorption at ∼1.56 μm which is modified when subject to a silicon implantation. After implantation, the intersubband absorption decreases and shifts to longer wavelengths. Also, with increasing implant dose, the intersubband absorption decreases. It is shown that both layer disordering of the heterointerfaces and doping compensation from the vacancies produced during the implantation cause the changes in the intersubband absorption. Such a method is useful for removing absorption in spatially defined areas of III-nitride optoelectronic devices by, for example, creating low-loss optical waveguides monolithically that can be integrated with as-grown areas operating as electro-absorption intersubband modulators.

More Details

Wide dynamic range of ring resonator channel-dropping filters with integrated SOAs

Optics InfoBase Conference Papers

Vawter, Gregory A.; Tauke-Pedretti, Anna; Skogen, Erik J.

We present the first complete simulation of the dynamic range and noise of InGaAsP multi-ring channel-drop filters with internal SOAs. The results show gain saturation, and spontaneous emission noise limit the dynamic range. © 2010 Optical Society of America.

More Details

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.

More Details

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.

More Details

Cascaded double ring resonator filter with integrated SOAs

2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, OFC/NFOEC 2011

Tauke-Pedretti, Anna; Vawter, Gregory A.; Skogen, Erik J.; Peake, Gregory M.; Overberg, Mark E.; Alford, Charles A.; 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. © 2011 Optical Society of America.

More Details

Wide dynamic range of ring resonator channel-dropping filters with integrated SOAs

2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, OFC/NFOEC 2011

Vawter, Gregory A.; Tauke-Pedretti, Anna; Skogen, Erik J.

We present the first complete simulation of the dynamic range and noise of InGaAsP multi-ring channel-drop filters with internal SOAs. The results show gain saturation, and spontaneous emission noise limit the dynamic range. © 2011 Optical Society of America.

More Details

Enhanced frequency response in monolithically integrated coupled cavity lasers and electro-absorption modulator

Vawter, Gregory A.; Wendt, J.R.; Alford, Charles A.; Skogen, Erik J.; Overberg, Mark E.; Peake, Gregory M.; Chow, Weng W.; Yang, Zhenshan Y.

We present the bandwidth enhancement of an EAM monolithically integrated with two mutually injection-locked lasers. An improvement in the modulation efficiency and bandwidth are shown with mutual injection locking.

More Details

Injection-locked composite lasers for mm-wave modulation : LDRD 117819 final report

Vawter, Gregory A.; Skogen, Erik J.; Chow, Weng W.; Overberg, Mark E.; Peake, Gregory M.; Wendt, J.R.

This report summarizes a 3-year LDRD program at Sandia National Laboratories exploring mutual injection locking of composite-cavity lasers for enhanced modulation responses. The program focused on developing a fundamental understanding of the frequency enhancement previously demonstrated for optically injection locked lasers. This was then applied to the development of a theoretical description of strongly coupled laser microsystems. This understanding was validated experimentally with a novel 'photonic lab bench on a chip'.

More Details
39 Results
39 Results