Abstract

We demonstrate a simple and effective wavelength-tunable add/drop filter suitable for coarse wavelength division multiplexing (CWDM) systems. The filter consists of two fibers in contact side by side, with identical long-period fiber gratings (LPG) in each fiber. The LPG couples the power in the fundamental core mode to one of the cladding modes, which is then coupled to the same order cladding mode in the other fiber through evanescent-field coupling between two fibers. Finally, the cladding mode in the second fiber is coupled to its core mode with the help of the other LPG. With an optimal longitudinal offset distance of 10 em, coupling efficiency as high as -1.68 dB and side lobes smaller than -24 dB were experimentally obtained. The experimental results agreed well with the theoretical ones. The operating wavelength of the proposed add/drop filter was tunable by varying the temperature. The temperature sensitivity was measured to be -0.43 nm/<TEX>$^{\circ}C$</TEX>.

© 2005 Optical Society of Korea

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  1. E. B. Grann, "Low cost CWDM optical transceivers," in Proc. Electronic Components and Technology Conf., 2001, pp. 26-29
    [Crossref]
  2. L. Domash, M. Wu, N. Nemchuk, and E. Ma, "Tunable and switchable multiple-cavity thin film filters," J. Lightwave Technol., vol. 22, pp. 126-135, 2004
    [Crossref]
  3. Y. Hibino, "Recent advances in high-density and largescale AWG Multi/Demultiplexers with higher indexcontrast silica-based PLCs," IEEE J. Selected Topics in Quantum Electron; vol. 8, pp. 1090-1101, 2002
    [Crossref]
  4. P. K. Lam, A. J. Stevenson, and J. D. Love, "Bandpass spectra of evanescent couplers with long period gratings," Electron. Lett., vol. 36, pp. 251-252, 2000
    [Crossref]
  5. V. Grubsky, D. S. Starodubov, and J. Feinberg, "Wavelength- selective coupler and add-drop multiplexer using long-period fiber gratings," in Tech. Dig., Optical Fiber Communication Conf., 2000, vol. 4, pp. 28-30
  6. K. S. Chiang, F. Y. M. Chan, and M. N. Ng, "Analysis of two parallel long-period fibre gratings," J. Lightwave Technol., vol. 22, pp. 1358-1366, 2004
    [Crossref]
  7. M. J. Kim, T. J. Eom, U. C. Paek, and B. H. Lee, "Add-Drop filter for CWDM using long-period fiber gratings," in Proc. Optical Society of Korea Annual Meeting, FD-V42, pp. 276-277, 2004
  8. A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, "Long-period fiber gratings as band-rejection filters," J. Lightwave Technol., vol. 14, pp. 58-65, 1996
    [Crossref]
  9. J. Lauzon and A. Chandonnet, "Grating-assisted fused fibre filter," in Proc. 11th Int. Conf. Integrated Optics and Optical Fibre Communications and 23rd European Conf. Optical Communications, Edinburgh, 1997, part 3, pp. 169-172
  10. Y. G. Han, W. T. Han, U. C. Paek, and Y. Chung, "Tunable bandpass filter with novel core mode blocker fabricated by local heat exposure," in Proc. OECC 2002, pp. 620-621, 2002
  11. S. Choi, T. J. Eom, J. W. Yu, B. H. Lee, and K. Oh, "Novel all-fiber bandpass filter based on hollow optical fiber," IEEE Photon. Technol. Lett., vol. 14, pp. 1701-1703, 2002
    [Crossref]
  12. F. Y. M. Chan and K. S. Chiang, "Analysis of apodized phase-shifted long-period fiber gratings," Opt. Commun., vol. 244, pp. 233-243, 2005
    [Crossref]
  13. X. Shu, L. Zhang, and I. Bennion, "Sensitivity characteristics of long-period fiber gratings," J. Lightwave Technol., vol. 20, pp. 255-266, 2002
    [Crossref]
  14. Z. Sheng, S. He, and L. Lou, "Design and simulation of a planar integrated demultiplexer for coarse WDM," Opt. Commun., vol. 225, pp. 95-100, 2003
    [Crossref]
  15. X. Chen, J. N. McMullin, C. J. Haugen, and R. G. DeCorby, "Planar concave grating demultiplexer for course WDM based on confocal ellipses," Opt. Commun., vol. 237, pp. 71-77, 2004
    [Crossref]
  16. L. Gu, F. Zhao, Z. Shi, J. Liu, and R. T. Chen, "Four-channel coarse WDM for inter- and intra-satellite optical communications," Opt. Laser Technol., vol. 37, pp. 551-554, 2005
    [Crossref]

2005 (2)

F. Y. M. Chan and K. S. Chiang, "Analysis of apodized phase-shifted long-period fiber gratings," Opt. Commun., vol. 244, pp. 233-243, 2005
[Crossref]

L. Gu, F. Zhao, Z. Shi, J. Liu, and R. T. Chen, "Four-channel coarse WDM for inter- and intra-satellite optical communications," Opt. Laser Technol., vol. 37, pp. 551-554, 2005
[Crossref]

2004 (4)

X. Chen, J. N. McMullin, C. J. Haugen, and R. G. DeCorby, "Planar concave grating demultiplexer for course WDM based on confocal ellipses," Opt. Commun., vol. 237, pp. 71-77, 2004
[Crossref]

L. Domash, M. Wu, N. Nemchuk, and E. Ma, "Tunable and switchable multiple-cavity thin film filters," J. Lightwave Technol., vol. 22, pp. 126-135, 2004
[Crossref]

K. S. Chiang, F. Y. M. Chan, and M. N. Ng, "Analysis of two parallel long-period fibre gratings," J. Lightwave Technol., vol. 22, pp. 1358-1366, 2004
[Crossref]

M. J. Kim, T. J. Eom, U. C. Paek, and B. H. Lee, "Add-Drop filter for CWDM using long-period fiber gratings," in Proc. Optical Society of Korea Annual Meeting, FD-V42, pp. 276-277, 2004

2003 (1)

Z. Sheng, S. He, and L. Lou, "Design and simulation of a planar integrated demultiplexer for coarse WDM," Opt. Commun., vol. 225, pp. 95-100, 2003
[Crossref]

2002 (4)

X. Shu, L. Zhang, and I. Bennion, "Sensitivity characteristics of long-period fiber gratings," J. Lightwave Technol., vol. 20, pp. 255-266, 2002
[Crossref]

Y. G. Han, W. T. Han, U. C. Paek, and Y. Chung, "Tunable bandpass filter with novel core mode blocker fabricated by local heat exposure," in Proc. OECC 2002, pp. 620-621, 2002

S. Choi, T. J. Eom, J. W. Yu, B. H. Lee, and K. Oh, "Novel all-fiber bandpass filter based on hollow optical fiber," IEEE Photon. Technol. Lett., vol. 14, pp. 1701-1703, 2002
[Crossref]

Y. Hibino, "Recent advances in high-density and largescale AWG Multi/Demultiplexers with higher indexcontrast silica-based PLCs," IEEE J. Selected Topics in Quantum Electron; vol. 8, pp. 1090-1101, 2002
[Crossref]

2001 (1)

E. B. Grann, "Low cost CWDM optical transceivers," in Proc. Electronic Components and Technology Conf., 2001, pp. 26-29
[Crossref]

2000 (2)

P. K. Lam, A. J. Stevenson, and J. D. Love, "Bandpass spectra of evanescent couplers with long period gratings," Electron. Lett., vol. 36, pp. 251-252, 2000
[Crossref]

V. Grubsky, D. S. Starodubov, and J. Feinberg, "Wavelength- selective coupler and add-drop multiplexer using long-period fiber gratings," in Tech. Dig., Optical Fiber Communication Conf., 2000, vol. 4, pp. 28-30

1997 (1)

J. Lauzon and A. Chandonnet, "Grating-assisted fused fibre filter," in Proc. 11th Int. Conf. Integrated Optics and Optical Fibre Communications and 23rd European Conf. Optical Communications, Edinburgh, 1997, part 3, pp. 169-172

1996 (1)

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, "Long-period fiber gratings as band-rejection filters," J. Lightwave Technol., vol. 14, pp. 58-65, 1996
[Crossref]

Electronic Components and Technology Conference, 2001. Proceedings., 51st (1)

E. B. Grann, "Low cost CWDM optical transceivers," in Proc. Electronic Components and Technology Conf., 2001, pp. 26-29
[Crossref]

Electronics Letters (1)

P. K. Lam, A. J. Stevenson, and J. D. Love, "Bandpass spectra of evanescent couplers with long period gratings," Electron. Lett., vol. 36, pp. 251-252, 2000
[Crossref]

Lightwave Technology, Journal of (4)

L. Domash, M. Wu, N. Nemchuk, and E. Ma, "Tunable and switchable multiple-cavity thin film filters," J. Lightwave Technol., vol. 22, pp. 126-135, 2004
[Crossref]

K. S. Chiang, F. Y. M. Chan, and M. N. Ng, "Analysis of two parallel long-period fibre gratings," J. Lightwave Technol., vol. 22, pp. 1358-1366, 2004
[Crossref]

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, "Long-period fiber gratings as band-rejection filters," J. Lightwave Technol., vol. 14, pp. 58-65, 1996
[Crossref]

X. Shu, L. Zhang, and I. Bennion, "Sensitivity characteristics of long-period fiber gratings," J. Lightwave Technol., vol. 20, pp. 255-266, 2002
[Crossref]

Optics & Laser Technology (1)

L. Gu, F. Zhao, Z. Shi, J. Liu, and R. T. Chen, "Four-channel coarse WDM for inter- and intra-satellite optical communications," Opt. Laser Technol., vol. 37, pp. 551-554, 2005
[Crossref]

Optics Communications (3)

Z. Sheng, S. He, and L. Lou, "Design and simulation of a planar integrated demultiplexer for coarse WDM," Opt. Commun., vol. 225, pp. 95-100, 2003
[Crossref]

X. Chen, J. N. McMullin, C. J. Haugen, and R. G. DeCorby, "Planar concave grating demultiplexer for course WDM based on confocal ellipses," Opt. Commun., vol. 237, pp. 71-77, 2004
[Crossref]

F. Y. M. Chan and K. S. Chiang, "Analysis of apodized phase-shifted long-period fiber gratings," Opt. Commun., vol. 244, pp. 233-243, 2005
[Crossref]

Photonics Technology Letters, IEEE (1)

S. Choi, T. J. Eom, J. W. Yu, B. H. Lee, and K. Oh, "Novel all-fiber bandpass filter based on hollow optical fiber," IEEE Photon. Technol. Lett., vol. 14, pp. 1701-1703, 2002
[Crossref]

Proc. 11th Int. Conf. Integrated Optics and Optical Fibre Communications and 23rd European Conf. (1)

J. Lauzon and A. Chandonnet, "Grating-assisted fused fibre filter," in Proc. 11th Int. Conf. Integrated Optics and Optical Fibre Communications and 23rd European Conf. Optical Communications, Edinburgh, 1997, part 3, pp. 169-172

Proc. OECC 2002 (1)

Y. G. Han, W. T. Han, U. C. Paek, and Y. Chung, "Tunable bandpass filter with novel core mode blocker fabricated by local heat exposure," in Proc. OECC 2002, pp. 620-621, 2002

Proc. Optical Society of Korea Annual Meeting, FD-V42 (1)

M. J. Kim, T. J. Eom, U. C. Paek, and B. H. Lee, "Add-Drop filter for CWDM using long-period fiber gratings," in Proc. Optical Society of Korea Annual Meeting, FD-V42, pp. 276-277, 2004

Selected Topics in Quantum Electronics, IEEE Journal of (1)

Y. Hibino, "Recent advances in high-density and largescale AWG Multi/Demultiplexers with higher indexcontrast silica-based PLCs," IEEE J. Selected Topics in Quantum Electron; vol. 8, pp. 1090-1101, 2002
[Crossref]

Tech. Dig., Optical Fiber Communication Conf. (1)

V. Grubsky, D. S. Starodubov, and J. Feinberg, "Wavelength- selective coupler and add-drop multiplexer using long-period fiber gratings," in Tech. Dig., Optical Fiber Communication Conf., 2000, vol. 4, pp. 28-30

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