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Proceedings Paper

Ultrafast optical signal generation and processing based on fiber long period gratings
Author(s): Reza Ashrafi; Ming Li; José Azaña
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Paper Abstract

Optical signal generation and processing are becoming increasingly important for a wide range of scientific and engineering applications, including high-speed optical telecommunications, optical computing circuits, optical biomedical imaging, advanced sensors and material/device characterization techniques. Optical approaches offer the possibility to overcome the severe speed limitations of present electronic circuits, which are practically limited to generation/processing speeds below a few tens of GHz. All-optical circuits would easily enable generation/processing speeds covering frequency bandwidths from 10s of GHz to several THz. As for conventional waveform generation/processing circuits in electronics, fundamental devices in the optical domain, such as basic processing functions and customized waveform generation schemes need to be realized and developed. Among all-optical implementation approaches, all-fiber technologies, e.g. fiber long period grating (LPG) and Bragg grating (BG), are attractive due to their simplicity, potential for low cost and full compatibility with fiber-optics and integrated-waveguide systems. The spatial resolution limitation of presently available fiber grating fabrication technologies has limited the fiber-based waveform generation/processing schemes to temporal resolutions of at least several picoseconds, i.e. corresponding to a few 100s of GHz in terms of the bandwidth of waveform generation/processing. In this work, we present our recent research results demonstrating that arbitrary optical waveforms with bandwidths well in the THz regime can be generated/processed using fiber LPG device. The proposed LPG solutions enable one to synthesize/process optical waveforms with temporal resolutions down to the femtosecond range, i.e. far faster operation bandwidths than conventional BG-based optical waveform generation/processing schemes.

Paper Details

Date Published: 13 November 2014
PDF: 6 pages
Proc. SPIE 9279, Real-time Photonic Measurements, Data Management, and Processing, 92790F (13 November 2014); doi: 10.1117/12.2071961
Show Author Affiliations
Reza Ashrafi, McGill Univ. (Canada)
Institut National de la Recherche Scientifique (Canada)
Ming Li, Institute of Semiconductors (China)
José Azaña, Institut National de la Recherche Scientifique (Canada)

Published in SPIE Proceedings Vol. 9279:
Real-time Photonic Measurements, Data Management, and Processing
Bahram Jalali; Ming Li; Keisuke Goda; Mohammad Hossein Asghari, Editor(s)

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