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Optics Letters

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  • Vol. 26, Iss. 16 — Aug. 15, 2001
  • pp: 1239–1241

Bandpass filters based on π-shifted long-period fiber gratings for actively mode-locked erbium fiber lasers

O. Deparis, R. Kiyan, O. Pottiez, M. Blondel, I. G. Korolev, S. A. Vasiliev, and E. M. Dianov  »View Author Affiliations


Optics Letters, Vol. 26, Issue 16, pp. 1239-1241 (2001)
http://dx.doi.org/10.1364/OL.26.001239


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Abstract

We have fabricated bandpass filters based on π-shifted long-period gratings for application in actively mode-locked erbium fiber lasers. Introducing the π-phase shift in the middle of the grating opens a bandpass within the core–cladding mode resonance peaks. With a 22-nm bandwidth filter inserted in an actively mode-locked erbium fiber sigma laser, solitonlike pulses are generated, with a power-dependent duration of ≈3–5 ps , at a 3-GHz repetition rate. These all-fiber filters have the advantages of low insertion loss (<0.5 dB) and a wide bandwidth (10–20 nm), and they do not require that a circulator be inserted into the laser cavity.

© 2001 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(140.3500) Lasers and laser optics : Lasers, erbium
(140.4050) Lasers and laser optics : Mode-locked lasers

Citation
O. Deparis, R. Kiyan, O. Pottiez, M. Blondel, I. G. Korolev, S. A. Vasiliev, and E. M. Dianov, "Bandpass filters based on π-shifted long-period fiber gratings for actively mode-locked erbium fiber lasers," Opt. Lett. 26, 1239-1241 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-16-1239


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