In this invited paper we introduce several types of waveguide spectrometers. We present a high-resolution 50-channel AWG spectrometer, including its use to interrogate a fibre Bragg grating sensor with a high wavelength accuracy of 1 pm. A 40-channel AWG operating in a broad wavelength range of 1250-1550 nm is introduced. We present a new 15-channel CWDM demultiplexer using a single curved Si-wire waveguide with an etched sidewall grating and chip size of only 90 μm × 140 μm. Finally, the first planar waveguide Fourier-transform spectrometer is presented, with a greatly increased light gathering capability and a static design.

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Conference Integrated Photonics and Nanophotonics Research and Applications, IPNRA 2009
Citation
Cheben, P., Schmid, J.H., Florjanczyk, M., Bock, P.J., Xu, D.-X., Janz, S., … Scott, A. (2009). Recent progress in planar waveguide spectrometers. Presented at the Integrated Photonics and Nanophotonics Research and Applications, IPNRA 2009.