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Optics Letters

Optics Letters


  • Vol. 27, Iss. 9 — May. 1, 2002
  • pp: 698–700

Bandwidth control of long-period grating-based mode converters in few-mode fibers

Siddharth Ramachandran, Zhiyong Wang, and Man Yan  »View Author Affiliations

Optics Letters, Vol. 27, Issue 9, pp. 698-700 (2002)

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Control of the group-velocity differences between two distinct modes in a few-mode fiber can be used to define the spectral characteristics of long-period gratings written in them. Using this effect, we report the demonstration of strong mode conversion (>99%) with long-period fiber gratings over what is believed to be a record bandwidth of 63 nm. These novel spectra are obtained from gratings written in specially designed few-mode fibers in which the grating phase-matching condition is satisfied over a large spectral range. We show that the bandwidths of such mode converters can be tailored by suitably altering the design of the few-mode fibers. The polarization-dependent coupling for the mode converters varies by less than 0.004% over the entire spectrum.

© 2002 Optical Society of America

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.4510) Fiber optics and optical communications : Optical communications
(350.2770) Other areas of optics : Gratings

Siddharth Ramachandran, Zhiyong Wang, and Man Yan, "Bandwidth control of long-period grating-based mode converters in few-mode fibers," Opt. Lett. 27, 698-700 (2002)

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  1. S. Ramachandran, B. Mikkelsen, L. C. Cowsar, M. F. Yan, G. Raybon, L. Boivin, M. Fishteyn, W. A. Reed, P. Wisk, D. Brownlow, R. G. Huff, and L. Gruner-Nielsen, IEEE Photon. Technol. Lett. 13, 632 (2001).
  2. C. D. Poole, J. M. Weisenfeld, D. J. DiGiovanni, and A. M. Vengsarkar, J. Lightwave Technol. 12, 1746 (1994).
  3. V. Grubsky and J. Feinberg, Opt. Lett. 25, 203 (2000).
  4. C. D. Poole, H. M. Presby, and J. M. Meetser, Electron. Lett. 30, 1437 (1994).

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