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Designs of on-chip Fourier transform spectrometers based on semiconductor waveguides
Author(s): Liang Li; Chenyu Peng; Yi Qi; Guangcan Zhou; Qifeng Qiao; Fook Siong Chau; Guangya Zhou
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Paper Abstract

Novel concepts of on-chip Fourier transform spectrometers is proposed. The principal element in the spectrometer is semiconductor waveguide directional couplers. The optical path difference can be tuned by varying the coupling length or influencing the propagation mode of the directional coupler. Solutions of both these two methods are proposed, and the theories are verified by spectra recovering. They function well around 1.5 μm wavelength. Further enhancement can be achieved by cascading more stages of directional couplers or extending the coupling length. This design meets the requirement of small size, weight and power and may be useful in future on-chip spectroscopic sensors.

Paper Details

Date Published: 4 March 2019
PDF: 6 pages
Proc. SPIE 10931, MOEMS and Miniaturized Systems XVIII, 109310Y (4 March 2019); doi: 10.1117/12.2507766
Show Author Affiliations
Liang Li, National Univ. of Singapore (Singapore)
Chenyu Peng, National Univ. of Singapore (Singapore)
Yi Qi, National Univ. of Singapore (Singapore)
Guangcan Zhou, National Univ. of Singapore (Singapore)
Qifeng Qiao, National Univ. of Singapore (Singapore)
Fook Siong Chau, National Univ. of Singapore (Singapore)
Guangya Zhou, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 10931:
MOEMS and Miniaturized Systems XVIII
Wibool Piyawattanametha; Yong-Hwa Park; Hans Zappe, Editor(s)

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