Long-period fiber grating fabricated by focused irradiation of femtosecond laser pulses

Yuki Kondo; Kentaro Nouchi; Tsuneo Mitsuyu; Masaru Watanabe; Peter G. Kazansky; Kazuyuki Hirao

doi:10.1117/12.371263

26 November 1999 Long-period fiber grating fabricated by focused irradiation of femtosecond laser pulses

Yuki Kondo, Kentaro Nouchi, Tsuneo Mitsuyu, Masaru Watanabe, Peter G. Kazansky, Kazuyuki Hirao

Proceedings Volume 3847, Optical Devices for Fiber Communication; (1999) https://doi.org/10.1117/12.371263
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

We have fabricated long-period fiber grating by focused irradiation of femtosecond laser pulses at 800 nm. The examined glass fiber is a non-H₂-loaded standard single mode fiber for telecommunication. We have found that, after focused irradiation of femtosecond pulses, refractive index at the focal point increases. We examine a thermal stability of the fabricated fiber gratings. Values of the loss peak wavelength and the transmittance of the fiber gratings after heat treatment below 500 degrees Celsius are the same as initial values before heat treatment. The fiber gratings fabricated by focused irradiation of femtosecond pulses at 800 nm have higher resistance to a thermal decay compared with those of UV-induced long-period fiber gratings. We discuss the mechanism of index change. We have proposed that this technique is useful for fabrication of long-period fiber gratings with a superior aging characteristic.

Citation Download Citation

Yuki Kondo, Kentaro Nouchi, Tsuneo Mitsuyu, Masaru Watanabe, Peter G. Kazansky, and Kazuyuki Hirao "Long-period fiber grating fabricated by focused irradiation of femtosecond laser pulses", Proc. SPIE 3847, Optical Devices for Fiber Communication, (26 November 1999); https://doi.org/10.1117/12.371263

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