Miniaturized spectrometer employing planar waveguides and grating couplers for chemical analysis

Abstract

Polymeric and metal oxide planar waveguides were used to demonstrate the potential of a miniature spectrometer. Multiwavelength light was transmitted through the substrate and coupled into the waveguide through a diffraction grating located at the substrate/waveguide interface. A second diffraction grating spatially dispersed the light propagated through the waveguide into component wavelengths for rapid analysis with a photodiode array detector. These results suggest that planar waveguides can be used to perform attenuated total internal reflection measurements in the visible and near-IR regions for chemical analysis of weak vibrational overtones and combination modes with effective path lengths of several millimeters.

© 1990 Optical Society of America

Spectroscopy of ytterbium-doped tantalum pentoxide rib waveguides on silicon

A. Aghajani, G. S. Murugan, N. P. Sessions, S. J. Pearce, V. Apostolopoulos, and J. S. Wilkinson
Opt. Mater. Express 4(8) 1505-1514 (2014)

Supported planar germanium waveguides for infrared evanescent-wave sensing

Susan E. Plunkett, Steven Propst, and Mark S. Braiman
Appl. Opt. 36(18) 4055-4061 (1997)

Waveguide lasers in ytterbium-doped tantalum pentoxide on silicon

A. Aghajani, G. S. Murugan, N. P. Sessions, V. Apostolopoulos, and J. S. Wilkinson
Opt. Lett. 40(11) 2549-2552 (2015)

Photoinduced grating filters in GeO₂ thin-film waveguides

Zhong-Yi Yin, Paul E. Jessop, and Brian K. Garside
Appl. Opt. 22(24) 4088-4092 (1983)

Titania, silicon dioxide, and tantalum pentoxide waveguides and optical resonant filters prepared with radio-frequency magnetron sputtering and annealing

Rabi Rabady and Ivan Avrutsky
Appl. Opt. 44(3) 378-383 (2005)