Highly compact temperature-insensitive phase-shifted and multiple-phase-shifted long-period fiber gratings by use of a CO2 laser

Yinian Zhu; Ping Shum; X. Chen; C. H. Tan; Hui-Wen Bay; C. Lu

doi:10.1117/12.590742

21 October 2004 Highly compact temperature-insensitive phase-shifted and multiple-phase-shifted long-period fiber gratings by use of a CO₂ laser

Yinian Zhu, Ping Shum, X. Chen, C. H. Tan, Hui-Wen Bay, C. Lu

Author Affiliations +

Proceedings Volume 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications; (2004) https://doi.org/10.1117/12.590742
Event: 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, 2004, Porlamar, Venezuela

Abstract

We demonstrate the first fabrication of highly-compact and temperature-insensitive phase-shifted and multiple phase-shifted long-period gratings using the focused pulses of CO₂ laser with point-by-point technique. By introducing the 3π/2, π, or π/2 phase shifts in the different location of the gratings with 480 μm of a period-length and total number about 16 - 21 periods, the symmetrical and asymmetrical pandpass filters based on those gratings can be obtained. The temperature sensitivity of formed gratings is about 8.8 pm/°C at a temperature range of 23°C - 190°C. Such fiber grating component could be used as an all-fiber oscillator in the laser cavity. Long-period gratings with different phase shifts are also investigated with various notches of resonance attenuations. All gratings fabricated are compactness to be packaged into the fiber-optic based devices.

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Yinian Zhu, Ping Shum, X. Chen, C. H. Tan, Hui-Wen Bay, and C. Lu "Highly compact temperature-insensitive phase-shifted and multiple-phase-shifted long-period fiber gratings by use of a CO₂ laser", Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); https://doi.org/10.1117/12.590742

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