Abstract
Photonic Hilbert transformers are fundamental components for optical computing and signal processing. Here, for the first time we propose all-optical arbitrary-order Hilbert transformers using phase-modulated fiber Bragg gratings (PM-FBGs) in transmission to our best knowledge. The PM-FBG is a kind of fiber grating, whose coupling strength remains almost uniform and period varies along the fiber length. For demonstration, we have designed and numerically simulated 0.5th-order, first-order, and 1.5th-order photonic Hilbert transformers, respectively. The profiles of those PM-FBGs are obtained employing quasi-Newton optimization algorithm. Simulation results show that the designed three Hilbert transformers are all in good agreement with the ideal results in bandwidths up to 500 GHz and can tolerate a large range of input pulse width.
| Original language | English |
|---|---|
| Article number | 27 |
| Number of pages | 10 |
| Journal | Photonics |
| Volume | 8 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 21 Jan 2021 |
Bibliographical note
© 2021 by the authors.Licensee MDPI, Basel, Switzerland.
This article is an open access article
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Attribution (CC BY) license (https://
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4.0/).
Keywords
- Fiber Bragg grating
- Optical fiber devices
- Optical pulse shaping
- Optical signal processing
- Photonic Hilbert transformer