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Conference Record of the IEEE Photovoltaic Specialists Conference
Cederberg, Jeffrey G. ; Nielson, Gregory N. ; Cruz-Campa, Jose L. ; Sanchez, Carlos A. ; Alford, Charles A. ; Okandan, Murat O. ; Skogen, Erik J. ; Lentine, Anthony L.
In this paper we propose a stacked multi-junction solar cell design that allows the intimate contact of the individual cells while maintaining low resistive losses. The cell design is presented using an InGaP and GaAs multi-junction cell as an illustrative example. However, the methodologies presented in this paper can be applied to other III-V cell types including InGaAs and InGaAsP cells. The main benefits of the design come from making small cells, on the order of 2×10-3 cm2. Simulations showed that series resistances should be kept to less than 5 ω for devices up to 400 μm in diameter to keep resistance power losses to less than 1%. Low resistance AuBe/Ni/Au ohmic contacts to n-type InGaP are also demonstrated with contact resistivity of 5×10-6 ωcm-2 when annealed at 420°C. © 2013 IEEE.
Vawter, Gregory A. ; Skogen, Erik J. ; Overberg, Mark E. ; Peake, Gregory M. ; Alford, Charles A. ; Wendt, J.R. ; Cajas, Florante G.
Vawter, Gregory A. ; Skogen, Erik J. ; Peake, Gregory M. ; Overberg, Mark E. ; Alford, Charles A. ; Cajas, Florante G.
Vawter, Gregory A. ; Skogen, Erik J. ; Peake, Gregory M. ; Overberg, Mark E. ; Alford, Charles A. ; Cajas, Florante G.
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.
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.
Vawter, Gregory A. ; Wendt, J.R. ; Alford, Charles A. ; Skogen, Erik J. ; Overberg, Mark E. ; Peake, Gregory M. ; Chow, Weng W. ; Yang, Zhenshan Y.
Skogen, Erik J. ; Vawter, Gregory A.
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.
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.
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.
Vawter, Gregory A. ; Wendt, J.R. ; Alford, Charles A. ; Skogen, Erik J. ; Peake, Gregory M. ; Overberg, Mark E. ; Chow, Weng W. ; Yang, Zhenshan Y.
We present a photonic integrated circuit (PIC) composed of two strongly coupled lasers. This PIC utilizes the dynamics of mutual injection locking to increase the relaxation resonance frequency from 3 GHz to beyond 30 GHz.
Skogen, Erik J. ; Vawter, Gregory A. ; Tauke-Pedretti, Anna ; Peake, Gregory M. ; Overberg, Mark E. ; Alford, Charles A. ; Sullivan, Charles T.
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'.
Skogen, Erik J. ; Vawter, Gregory A. ; Tauke-Pedretti, Anna ; Peake, Gregory M. ; Overberg, Mark E. ; Sullivan, Charles T.
Vawter, Gregory A. ; Skogen, Erik J. ; Peake, Gregory M. ; Overberg, Mark E. ; Chow, Weng W. ; Yang, Zhenshan Y.
Vawter, Gregory 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.
Vawter, Gregory A. ; Tauke-Pedretti, Anna ; Skogen, Erik J.
Sullivan, Charles T. ; Hsu, Alan Y. ; Keeler, Gordon A. ; Raring, James W. ; Serkland, Darwin K. ; Skogen, Erik J. ; Spahn, Olga B. ; Vawter, Gregory A.
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