Rapid decay of type-II femtosecond laser inscribed gratings within Q-switched Yb3+-doped fiber lasers

M. L. Åslund; N. Jovanovic; J. Canning; S. D. Jackson; G. D. Marshall; A. Fuerbach; M. J. Withford

doi:10.1109/LPT.2010.2041346

Rapid decay of type-II femtosecond laser inscribed gratings within Q-switched Yb3+-doped fiber lasers

M. L. Åslund, N. Jovanovic, J. Canning, S. D. Jackson, G. D. Marshall, A. Fuerbach, M. J. Withford

MQ Photonics Research Centre

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

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Abstract

Fiber lasers that utilize femtosecond (fs) laser inscribed type-II fiber Bragg gratings within the active medium are known to produce stable output powers in excess of 100 W during continuous-wave operation. However, here we show that the gratings undergo rapid annealing when employed as high reflectors in pulsed Q -switched fiber lasers operating at average power levels of less than 0.5 W. We demonstrate that a combination of a high population inversion and a high optical field seems to drive this annealing process and point out similarities to photodarkening.

Original language	English
Article number	5404741
Pages (from-to)	504-506
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	22
Issue number	7
DOIs	https://doi.org/10.1109/LPT.2010.2041346
Publication status	Published - 1 Apr 2010

Bibliographical note

Copyright [2010] IEEE. Reprinted from IEEE photonics technology letters, Volume 22, Issue 7, 504-506. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Macquarie Universityâ€™s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

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title = "Rapid decay of type-II femtosecond laser inscribed gratings within Q-switched Yb3+-doped fiber lasers",

abstract = "Fiber lasers that utilize femtosecond (fs) laser inscribed type-II fiber Bragg gratings within the active medium are known to produce stable output powers in excess of 100 W during continuous-wave operation. However, here we show that the gratings undergo rapid annealing when employed as high reflectors in pulsed Q -switched fiber lasers operating at average power levels of less than 0.5 W. We demonstrate that a combination of a high population inversion and a high optical field seems to drive this annealing process and point out similarities to photodarkening.",

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AU - Canning, J.

AU - Jackson, S. D.

AU - Marshall, G. D.

AU - Fuerbach, A.

AU - Withford, M. J.

N1 - Copyright [2010] IEEE. Reprinted from IEEE photonics technology letters, Volume 22, Issue 7, 504-506. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Macquarie Universityâ€™s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

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N2 - Fiber lasers that utilize femtosecond (fs) laser inscribed type-II fiber Bragg gratings within the active medium are known to produce stable output powers in excess of 100 W during continuous-wave operation. However, here we show that the gratings undergo rapid annealing when employed as high reflectors in pulsed Q -switched fiber lasers operating at average power levels of less than 0.5 W. We demonstrate that a combination of a high population inversion and a high optical field seems to drive this annealing process and point out similarities to photodarkening.

AB - Fiber lasers that utilize femtosecond (fs) laser inscribed type-II fiber Bragg gratings within the active medium are known to produce stable output powers in excess of 100 W during continuous-wave operation. However, here we show that the gratings undergo rapid annealing when employed as high reflectors in pulsed Q -switched fiber lasers operating at average power levels of less than 0.5 W. We demonstrate that a combination of a high population inversion and a high optical field seems to drive this annealing process and point out similarities to photodarkening.

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Rapid decay of type-II femtosecond laser inscribed gratings within Q-switched Yb3+-doped fiber lasers

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