J
Joseph P. Donnelly
Researcher at Massachusetts Institute of Technology
Publications - 196
Citations - 4057
Joseph P. Donnelly is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Laser & Semiconductor laser theory. The author has an hindex of 36, co-authored 196 publications receiving 3900 citations. Previous affiliations of Joseph P. Donnelly include Brigham and Women's Hospital.
Papers
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Journal ArticleDOI
Biomimetic gradient hydrogels for tissue engineering
Shilpa Sant,Matthew J. Hancock,Matthew J. Hancock,Joseph P. Donnelly,Joseph P. Donnelly,Dharini Iyer,Dharini Iyer,Dharini Iyer,Ali Khademhosseini,Ali Khademhosseini +9 more
TL;DR: This review draws on specific biological examples to motivate hydrogel gradients as tools for studying cell-material interactions and summarizes the current and future trends in gradient hydrogels and cell- material interactions in context with the long-term goals of tissue engineering.
Patent
Planar optical waveguide, modulator, variable coupler and switch
TL;DR: In this article, a planar semiconductor optical waveguide, modulator, variable coupler and switch are described, and the coupling length is such that substantially all the optical energy in the input channel is coupled to and emerges from the other channel.
Journal ArticleDOI
Design Considerations for 1.06- $mu$ m InGaAsP–InP Geiger-Mode Avalanche Photodiodes
Joseph P. Donnelly,E.K. Duerr,K. A. McIntosh,Eric A. Dauler,Douglas C. Oakley,Steven H. Groves,Christopher J. Vineis,L.J. Mahoney,K.M. Molvar,P.I. Hopman,Katharine Jensen,G.M. Smith,Simon Verghese,D. C. Shaver +13 more
TL;DR: In this paper, a device model based on experimental data that can simultaneously predict dark count rate and photon detection efficiency (PDE) as a function of overbias and temperature is presented.
Journal ArticleDOI
Near-diffraction-limited diode laser arrays by wavelength beam combining.
Bien Chann,Robin K. Huang,Leo J. Missaggia,C.T. Harris,Zong-Long Liau,Anish K. Goyal,Joseph P. Donnelly,T. Y. Fan,Antonio Sanchez-Rubio,George W. Turner +9 more
TL;DR: This work demonstrates 35 W output peak power with M2 approximately 1.35 in both dimensions from a 100 element, 100 microm pitch slab-coupled optical waveguide laser diode array using wavelength beam combining.
Patent
Hybrid two-dimensional surface-emitting laser arrays
TL;DR: In this paper, a two-dimensional surface-emitting diode laser arrays are described that take advantage of both the advanced state of development of linear laser arrays with conventional cleaved end faces and the rapid development of Si heat sink technology.