This invited talk presents the evolution of the planar waveguide dispersive devices developed in our laboratory for spatial heterodyne spectroscopy. The basic concepts are introduced and then applied to a Mach-Zehnder interferometer array capable of a resolution of 0.1 nm over a bandwidth of 2.5 nm.
We report a spatial heterodyne Fourier-transform spectrometer consisting of an array of Mach-Zehnder interferometers (MZI) implemented in silicon microphotonics. Optical path differences between the MZI arms increase linearly along the array, generating a wavelength-dependent interferogram which enables the retrieval of the source spectrum with a single… (More)
We present the development of a compact planar waveguide Fourier-transform spectrometer for high-resolution and high-throughput spectroscopy. The prototype device is designed to monitor the water vapor absorption band near λ = 1364 nm in the atmosphere from an Earth-orbiting satellite. The instrument is fully static (i.e. no moving parts) and it is… (More)
This invited paper presents several passive devices containing long silicon photonic wires condensed into spirals. These devices present a large density factor due to their high ratio length over area that improves at the same time their efficiency and fabrication cost. The talk will present the basic equations of the waveguide shape as well as the design… (More)
We review two emerging concepts in planar waveguide multiplexers and spectrometers. The first concept is a planar waveguide demultiplexer with the wavelength dispersive properties provided by a diffraction grating formed in the sidewall of a curved Si waveguide. The phase errors are minimized using an apodized design with a chirped grating, yielding a… (More)
We review recent advances in silicon photonic arrayed waveguide grating and sub-wavelength grating devices developed at the NRC Canada. We present three original microspectrometer concepts, namely a compact 50 channel AWG microspectrometer with a spectral resolution of 1 A and a total chip size of 8 x 8 mm", a Fourier- transform AWG with a markedly… (More)
The physical layer performance of a reconfigurable metro ring network is investigated through numerical simulations. Typical signal impairments are considered and mitigated assuming that the reconfigurable add drop multiplexer nodes are based on small switch arrays. System-optimized specifications for the spectral bandwidth of optical filters, electrical… (More)