Abstract

A spatial walk-off polarizer having a split angle of more than 20^{irc} in both the 1.3 and 1.5 m wavelength regions has been fabricated for the first time. The polarizer consists of alternate laminated layers of poly-Si and silica. The new polarizer makes the best use of the characteristics of crystal Si, namely high refractive index, and low absorption coefficients in the longer wavelength regions. A rather simplified fabrication process that utilizes the RF sputtering method is also proposed, in which only the oxygen-intake valve is used to control the deposition of poly-Si and silica layers from a single-crystal Si target. The fabricated polarizer has beam splitting angles as large as 22 and 21^{irc} at wavelengths of 1.30 and 1.55 m, respectively, being roughly four times larger than those of rutile or calcite.

[IEEE ]

PDF Article

References

  • View by:
  • |

  1. M. Shirasaki and K. Asama, "Compact optical isolator for fibers using birefringent wedges," Appl. Opt., vol. 21, pp. 4296-4299, 1982.
  2. K. Shiraishi, T. Chuzenji, and S. Kawakami, "Polarization-independent in-line optical isolator with lens-free configuration," J. Lightwave Technol., vol. 10, pp. 1839-1842, 1992.
  3. K. Shiraishi and S. Kawakami, "Spatial walk-off polarizer utilizing artificial anisotropic dielectrics," Opt. Lett., vol. 15, pp. 516-518, May 1990.
  4. T. Sato, T. Sasaki, K. Tsuchida, K. Shiraishi, and S. Kawakami, "Scattering mechanism and reduction of insertion losses in a laminated polarization splitter," Appl. Opt., vol. 33, pp. 6925-6934, Oct. 1994.
  5. C. Amra, J. H. Apfel, and E. Pelletier, "Role of interface correlation in light scattering by a multilayer," Appl. Opt., vol. 31, pp. 3134-3151, 1992.

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.