DOI QR코드

DOI QR Code

2×2Ti:LiNbO3 Integrated Optical Add/Drop Multiplexers utilizing Strain-Optic Effect

스트레인광학효과를 이용한 2×2Ti:LiNbO3 삽입/분기 집적광학 멀티플렉서

  • 정홍식 (홍익대학교, 과학기술대학, 전자전기공학과) ;
  • 최용욱 (홍익대학교, 과학기술대학, 전자전기공학과)
  • Published : 2006.10.25

Abstract

Polarization-independent $Ti:LiNbO_3\;2{\times}2$ optical add/drop multiplexer for the 1550nm wavelength region is fabricated. The device consists of two input waveguides, two polarization beam splitters. two polarization conversion/electrooptic tuning waveguide sections, and two output waveguides. The single mode channel waveguides for both TE and TM polarizations are fabricated on a x-cut $Ti:LiNbO_3$substrate by Ti diffusion. Spectral section is based on phase-matched polarization conversion due to shear strain induced by a thick $SiO_2$ grating overlay film. An applied voltage tunes the device by changing the waveguide birefringence, hence the optical wavelength at which most efficient polarization conversion occurs. Tuning rate of 0.094nm/V with a maximum range of 17nm has been obtained. The nearest side-lobe is about 8.2dB. The FWHM is 3.72nm.

References

  1. G.K. Chang, G. Ellinas, J. Gamelin, M.Z. Iqbal, and Charles A. Brackett, 'Multi-wavelength reconfigurable wdm/atm/sonnet network testbed,' J. Lightwave Technol., vol. 14, pp. 1320-1340, 1996 https://doi.org/10.1109/50.511664
  2. T. Chikama, H. Onaka, and S. Kuroyanagi, 'Photonic networking using optical add drop multiplexers and optical cross-connects,' FUJITSU Sci. Tech. J., 1999, 35, pp. 46-55
  3. D. Sadot and E. Boimovich, 'Tunable optical filters for dense WDM networks,' IEEE Communications Magazine, vol. 36, pp. 1059-1062, 1998
  4. Hong-Sik Jung, '$Ti:LiNbO_3\;2{\times}2$ optical add/drop multiplexers utilizing tilted film-loaded strip $SiO_2$ SAW waveguides in $Ti:LiNbO_3$,' Optical Engineering 44(2), pp. 024601-024608, Feb. 2005 https://doi.org/10.1117/1.1850100
  5. Gi-Jo Jung, Jung-Hee Kim, and Hong-Sik Jung, '$Ti:LiNbO_3\;2{\times}2$ optical add/drop multiplexers utilizing acousto-optic effect,' J. Optical Society of Korea, Vol. 6, No. 2, pp. 27-32, June 2002 https://doi.org/10.3807/JOSK.2002.6.2.027
  6. W. Warzanski, F. Heismann, and R. C. Alferness, 'Polarization-independent electrooptically tunable narrow- band wavelength filter,' Appl. Phys. Lett. 53, pp. 13-15, 1988 https://doi.org/10.1063/1.100566
  7. E. L. Wooten, R. L. Stone, E. W. Miles, and E. M. Bradely, 'Rapidly tunable narrow-band wavelength filter using $LiNbO_3$ unbalanced Mach-Zehnder interferometers,' J. Lightwave Technol., vol. 14, pp. 2530-2536, Nov. 1996 https://doi.org/10.1109/50.548151
  8. Z. Tang, O. Eknoyan, and H. F. Taylor, 'Polarizationindependent electrooptically tunable wavelength filter in $LiTaO_3$,' Electron. Lett. Vol. 30, pp. 1758-1759, 1994 https://doi.org/10.1049/el:19941217
  9. Y. ping, O. Eknoyan and H. F. Taylor, 'Polarizationindependent tunable bandpass filter utilizing symmetric branch beam splitters,' Electron. Lett. Vol. 40, No. 15, pp. 1758-1759, 1994
  10. H. S. Jung, O. Eknoyan and H. F. taylor, 'Wavelength Tuanble Polarization Mode Converter Utilizing Strain-Optic Effects in $Ti:LiNbO_3$,' Jpn. J. Appl. Phys. Vol. 38, Part 2, No. 12A, pp. L 1406-L1408, Dec. 1999 https://doi.org/10.1143/JJAP.38.L1406
  11. 김정희, 정기조, 정홍식 이한영, '$1.55{\mu}m\;Ti:LiNbO_3$ 광도 파로의 두 모드 간섭을 이용한 편광모드 분리기,' 한국광학회지, Vol. 13, No. 1, pp. 32-37, Feb. 2002
  12. T. Mizuochi, T. Kitayama, K. Shimizu, and K. Ito, 'Interferometric Crosstalk-Free Optical Add/Drop Multiplexer Using Mach-Zehnder-Based Fiber Grating,' J. Lightwave Technol., vol. 6, pp. 265-276, 1996
  13. H. F. Taylor, 'Tuanble Spectral Slicing Filters for Dense Wavelength-Division Multiplexing,' J. Lightwave Technol., vol. 21, No. 3, pp. 837-847, Mar. 2003 https://doi.org/10.1109/JLT.2003.809555
  14. P. Tang, O. Eknoyan, and H. F. Taylor, 'Rapidly Tunable Optical Add-Drop Mutiplexer (OADM) Using a Static-Strain-Induced Grating in $LiTaO_3$,' J. Lightwave Technol.,vol. 21, No. 1, pp. 236-245, Jan. 2003 https://doi.org/10.1109/JLT.2003.808609
  15. J. M. H. Elmirghani and H. T. Moutfah, 'Technologie and architectures for scalable dynamic dense WDM networks,' IEEE Communications Magazine, vol. 38, pp. 56-58, 2000 https://doi.org/10.1109/MCOM.2000.819896