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Applied Optics

Applied Optics


  • Vol. 39, Iss. 13 — May. 1, 2000
  • pp: 2038–2042

Control of the characteristics of a long-period grating by cladding etching

Sungchul Kim, Yoonchan Jeong, Seungwoo Kim, Jaejoong Kwon, Namki Park, and Byoungho Lee  »View Author Affiliations

Applied Optics, Vol. 39, Issue 13, pp. 2038-2042 (2000)

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We have analyzed the effects of the fiber cladding radius on the characteristics of long-period fiber gratings. By etching the cladding of a common single-mode fiber, we verified the characteristics experimentally. When by etching we reduce the cladding radius of a common single-mode fiber on which a long-period refractive-index modulation has been imposed, the coupling strength of the core and the cladding modes increases. In addition, the difference in the propagation constants (for a fixed wavelength) between the core mode and the cladding modes increases; hence the resonant transmission dip wavelengths shift to longer wavelengths. The proposed method can be useful in making and detuning long-period fiber grating filters.

© 2000 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2340) Fiber optics and optical communications : Fiber optics components
(350.2450) Other areas of optics : Filters, absorption

Original Manuscript: September 20, 1999
Revised Manuscript: January 28, 2000
Published: May 1, 2000

Sungchul Kim, Yoonchan Jeong, Seungwoo Kim, Jaejoong Kwon, Namki Park, and Byoungho Lee, "Control of the characteristics of a long-period grating by cladding etching," Appl. Opt. 39, 2038-2042 (2000)

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