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Tunable dispersion-tolerant picosecond flat-top waveform generation using an optical differentiator

Tunable dispersion-tolerant picosecond flat-top waveform generation using an optical differentiator
Tunable dispersion-tolerant picosecond flat-top waveform generation using an optical differentiator

We study the influence of dispersive propagation on picosecond flat-top pulses, which are generated using long period fiber grating (LPG)based optical differentiators. We suggest an extremely simple scheme to compensate for the dispersion-induced flat-top pulse distortion; this scheme is based on proper tuning the LPG coupling strength. As this coupling strength may be changed via LPG axial straining, the demonstrated device can be tuned to compensate for different levels of the dispersion in a very easy and straightforward fashion. This allows for very fine flat-top pulse shape adjustment, even after propagation through a relatively long section of dispersive optical fiber. In the experimental demonstration reported here, the dispersion tolerance of 1.8-ps flat-top pulses propagating through a standard telecom fiber (SMF-28) was increased from ≈2 m to ≈ 18 m, giving a 9-fold improvement.

1094-4087
6717-6726
Slavík, R.
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Park, Y.
3532b0f2-e994-4132-80f4-f872aedc0a42
Azaña, J.
412da1ed-3b3e-4580-89fb-73d05a91f044
Slavík, R.
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Park, Y.
3532b0f2-e994-4132-80f4-f872aedc0a42
Azaña, J.
412da1ed-3b3e-4580-89fb-73d05a91f044

Slavík, R., Park, Y. and Azaña, J. (2007) Tunable dispersion-tolerant picosecond flat-top waveform generation using an optical differentiator. Optics Express, 15 (11), 6717-6726. (doi:10.1364/OE.15.006717).

Record type: Article

Abstract

We study the influence of dispersive propagation on picosecond flat-top pulses, which are generated using long period fiber grating (LPG)based optical differentiators. We suggest an extremely simple scheme to compensate for the dispersion-induced flat-top pulse distortion; this scheme is based on proper tuning the LPG coupling strength. As this coupling strength may be changed via LPG axial straining, the demonstrated device can be tuned to compensate for different levels of the dispersion in a very easy and straightforward fashion. This allows for very fine flat-top pulse shape adjustment, even after propagation through a relatively long section of dispersive optical fiber. In the experimental demonstration reported here, the dispersion tolerance of 1.8-ps flat-top pulses propagating through a standard telecom fiber (SMF-28) was increased from ≈2 m to ≈ 18 m, giving a 9-fold improvement.

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More information

Published date: 28 May 2007

Identifiers

Local EPrints ID: 456646
URI: http://eprints.soton.ac.uk/id/eprint/456646
ISSN: 1094-4087
PURE UUID: 280e034f-1033-4491-addb-56e43508cb1e
ORCID for R. Slavík: ORCID iD orcid.org/0000-0002-9336-4262

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Date deposited: 05 May 2022 17:00
Last modified: 06 May 2022 01:41

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Contributors

Author: R. Slavík ORCID iD
Author: Y. Park
Author: J. Azaña

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