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Refractive index profile changes caused by arc discharge in long-period fiber gratings fabricated by a point-by-point method |
Applied Optics, Vol. 51, Issue 34, pp. 8271-8276 (2012)
http://dx.doi.org/10.1364/AO.51.008271
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Abstract
Long-period fiber gratings were inscribed in a commercial silica fiber by a point-by-point arc discharge technique with different discharge conditions. The refractive index (RI) profile change induced by arc discharge was measured using the quantitative phase microscopy for the first time to our knowledge. The causes of the transmission variations induced by different arc discharges and the mechanisms of the RI profile change were investigated based on the measured phase profiles. The RI in the core and the cladding has clearly changed due to arc discharge. The central dip in the core profile diminished very much, and the index gradient became gradual. The resonance wavelengths have fluctuated by discharge current and time owing to variations of the reduction of the core–cladding RI difference and the extent of the RI change region.
© 2012 Optical Society of America
OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: September 27, 2012
Revised Manuscript: October 29, 2012
Manuscript Accepted: November 2, 2012
Published: November 30, 2012
Citation
Fatemeh Abrishamian, Nicoleta Dragomir, and Katsumi Morishita, "Refractive index profile changes caused by arc discharge in long-period fiber gratings fabricated by a point-by-point method," Appl. Opt. 51, 8271-8276 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-34-8271
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