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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 22 — Nov. 15, 2004
  • pp: 2608–2610

Wide-passband, temperature-insensitive, and compact π-phase-shifted long-period gratings in endlessly single-mode photonic crystal fiber

Yinian Zhu, Ping Shum, Hui-Wen Bay, Xiaoyan Chen, Ching-Hwee Tan, and Chao Lu  »View Author Affiliations


Optics Letters, Vol. 29, Issue 22, pp. 2608-2610 (2004)
http://dx.doi.org/10.1364/OL.29.002608


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Abstract

We demonstrate what is believed to be the first fabrication of a wide-passband, temperature-insensitive, and compact spectral filter based on a π-phase-shifted long-period grating in an endless single-mode photonic crystal fiber. By introducing a π-phase shift in the middle of a 12-period long-period grating, two symmetrical rejection bands at wavelengths of 1252.65 and 1418.7 nm are obtained with isolation higher than 18 dB and a passband bandwidth of 84.15 nm. The π-phase-shifted long-period gratings are inscribed by the relaxation of mechanical stress with the focused pulses of a CO2 laser and a point-by-point technique without geometric deformation. The length of the spectral filter is ~6.6 mm with a sensitivity of 8 pm/°C at a medium temperature range of 23–190 °C.

© 2004 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(050.5080) Diffraction and gratings : Phase shift
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(230.3990) Optical devices : Micro-optical devices

Citation
Yinian Zhu, Ping Shum, Hui-Wen Bay, Xiaoyan Chen, Ching-Hwee Tan, and Chao Lu, "Wide-passband, temperature-insensitive, and compact π-phase-shifted long-period gratings in endlessly single-mode photonic crystal fiber," Opt. Lett. 29, 2608-2610 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-22-2608

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