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Hugh Podmore - IEEE Xplore Author Profile

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90° hybrids are important components for coherent optical communications. Conventional implementations only cover the C band, while broadband, metamaterial-based devices require sub-100nm feature sizes. We propose a design based on dual-etch silicon subwavelength structures that achieves a 170 nm bandwidth with deep-UV compatible feature sizes.Show More
We develop a Silicon on Insulator based integrated optical chip for Interferometric Fiber Optic Gyroscopes. The optical design mirrors what is being done in literature, however some differentiating factors include: the introduction of a polarization filter and the choice of waveguide technology. The polarization filter alongside the grating couplers will result in a polarization extinction ratio o...Show More
Honeywell Aerospace has been selected by the Canadian Space Agency to implement the Quantum Encryption and Science Satellite (QEYSSat), a Canadian-owned and operated scientific and technology demonstration mission towards the next-generation of secure communications infrastructure. Quantum key distribution (QKD) is a method for distributing, via single-photon transfer, verifiably-confidential encr...Show More
We demonstrate a novel compressed sensing Fourier-transform spectrometer (FTS) in a compact format. This FTS consists of 160 planar-waveguide Mach-Zehnder interferometers (MZIs) arrayed on a photonic chip, effecting a discrete Fourier-transform of the input spectrum. Incoherence between the sampling domain, and the signal domain permits compressive sensing retrieval of sparse spectra using an unde...Show More
We report our advances in development of on-chip Fourier-transform spectrometers. Specifically, we present applications of subwavelength engineered waveguides in a new type of a compressive-sensing Fourier-transform spatial heterodyne spectrometer chip. The spectrometer is implemented as an array of Mach-Zehnder interferometers (MZIs) integrated on a photonic chip, in a spatial heterodyne configur...Show More
This paper presents the design and operating principles of an advanced Fourier transform (FT) microspectrometer. The microspectrometer is a static Fourier transform instrument based on the principle of spatial heterodyne spectroscopy (SHS), affording high optical throughput (étendue) as compared with an arrayed waveguide (AWG) or planar waveguide echelle grating spectrometer. The instrument is rea...Show More
The application of 2-dimensional periodic arrays of sub-wavelength structures as anti-reflection surfaces at the interface between a vacuum and commercial solar cell coverglass is investigated. It is determined that compared to commercial anti-reflective coatings a single anti-reflective sub-wavelength grating will yield 3.7 to 7.1% total increase in power production during a 24 hour orbital perio...Show More