Abstract

A dynamic dense-wavelength-division-multiplexing (DWDM) channel blocker and equalizer is developed based on liquid crystal (LC) and dispersion control technology. A multipixel LC array is adopted to regulate the power level of each DWDM channel, while a reflective grating diffracts the input signals spatially to corresponding LC pixels. A dispersion control unit is proposed and employed to enhance the dispersion and compensate the intrinsic nonlinear dispersion of the grating. Therefore, all LC pixels could handle corresponding lights centered at the International Telecommunications Union Grids. A 40-channel, 100-GHz channel-spacing dynamic wavelength blocker/equalizer is thus demonstrated with ${-}5$ dB insertion loss and over 40 dB extinction ratio. The maximum center frequency shift of all 40 channels is ${\sim}{\pm}2$ GHz, which means our dispersion control technology works very well for grating-based DWDM devices.

© 2010 IEEE

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  1. S. P. Wang, C. H. Cheng, Y. Q. Lu, C. Wong, "Dynamic channel blocker/equalizer with high blocking extinction ratio," Opt. Eng. 47, 025003- (2008).
  2. H. Uetsuka, "AWG technologies for dense WDM applications," IEEE J. Sel. Topics Quantum Electron. 10, 393-402 (2004).
  3. K. Maru, Y. Abe, "Low-loss, flat-passband and athermal arrayed-waveguide grating multi/demultiplexer," Opt. Exp. 15, 18351-18356 (2007).
  4. H. Yuan, W. D. Zhong, W. S. Hu, "FBG-based bidirectional optical cross connects for bidirectional WDM ring networks," J. Lightw. Technol. 22, 2710-2721 (2004).
  5. Q. R. Huang, F. G. Luo, Z. Wang, M. Xia, J. Hu, J. Yuan, G. Shen, "Parallel-stage-based reconfigurable optical add-drop multiplexer for WDM optical transport networks," IEEE Photon. Technol. Lett. 18, 1864-1866 (2006).
  6. R. Srivastava, R. K. Singh, Y. N. Singh, "Fiber-optic switch based on fiber Bragg gratings," IEEE Photon. Technol. Lett. 20, 1581-1583 (2008).
  7. D. M. Maron, D. T. Neilson, D. S. Greywall, C. S. Pai, N. R. Basavanhally, V. A. Aksyuk, D. O. Lopez, F. Pardo, M. E. Simon, Y. Low, P. Kolodner, C. A. Bolle, "Wavelength-selective 1 $\times$ k switches using free-space optics and MEMS micromirrors: Theory, design, and implementation," J. Lightw. Technol. 23, 1620-1630 (2005).
  8. M. C. Wu, O. Solgaard, J. E. Ford, "Optical MEMS for lightwave communication," J. Lightw. Technol. 24, 4433-4454 (2006).
  9. C. Antoine, X. Li, J. S. Wang, O. Solgaard, "Reconfigurable optical wavelength multiplexer using a MEMS tunable blazed grating," J. Lightw. Technol. 25, 1-8 (2007).
  10. N. A. Riza, N. Madamopoulos, "Compact switched-retroreflection-based 2$\,\times\,$2 optical switching fabric for WDM applications," J. Lightw. Technol. 23, 247-259 (2005).
  11. J. Ertel, R. Helbing, C. Hoke, O. Landolt, K. Nishimura, P. Robrish, R. Trutna, "Design and performance of a reconfigurable liquid-crystal-based optical add/drop multiplexer," J. Lightw. Technol. 24, 1674-1680 (2006).
  12. X. Liang, Y. Q. Lu, Y. H. Wu, F. Du, H. Y. Wang, S. T. Wu, "Dual-frequency addressed variable optical attenuator with submillisecond response time," Jpn. J. Appl. Phys. 44, 1292-1295 (2005).
  13. I. C. Khoo, S. T. Wu, Optics and Nonlinear Optics of Liquid Crystal (World Scientific, 1993).
  14. X. J. Wang, Z. D. Huang, J. Feng, X. F. Chen, X. Liang, Y. Q. Lu, "Liquid crystal modulator with ultra-wide dynamic range and adjustable driving voltage," Opt. Exp. 16, 13168-13174 (2008).

2008 (3)

S. P. Wang, C. H. Cheng, Y. Q. Lu, C. Wong, "Dynamic channel blocker/equalizer with high blocking extinction ratio," Opt. Eng. 47, 025003- (2008).

R. Srivastava, R. K. Singh, Y. N. Singh, "Fiber-optic switch based on fiber Bragg gratings," IEEE Photon. Technol. Lett. 20, 1581-1583 (2008).

X. J. Wang, Z. D. Huang, J. Feng, X. F. Chen, X. Liang, Y. Q. Lu, "Liquid crystal modulator with ultra-wide dynamic range and adjustable driving voltage," Opt. Exp. 16, 13168-13174 (2008).

2007 (2)

C. Antoine, X. Li, J. S. Wang, O. Solgaard, "Reconfigurable optical wavelength multiplexer using a MEMS tunable blazed grating," J. Lightw. Technol. 25, 1-8 (2007).

K. Maru, Y. Abe, "Low-loss, flat-passband and athermal arrayed-waveguide grating multi/demultiplexer," Opt. Exp. 15, 18351-18356 (2007).

2006 (3)

Q. R. Huang, F. G. Luo, Z. Wang, M. Xia, J. Hu, J. Yuan, G. Shen, "Parallel-stage-based reconfigurable optical add-drop multiplexer for WDM optical transport networks," IEEE Photon. Technol. Lett. 18, 1864-1866 (2006).

M. C. Wu, O. Solgaard, J. E. Ford, "Optical MEMS for lightwave communication," J. Lightw. Technol. 24, 4433-4454 (2006).

J. Ertel, R. Helbing, C. Hoke, O. Landolt, K. Nishimura, P. Robrish, R. Trutna, "Design and performance of a reconfigurable liquid-crystal-based optical add/drop multiplexer," J. Lightw. Technol. 24, 1674-1680 (2006).

2005 (3)

X. Liang, Y. Q. Lu, Y. H. Wu, F. Du, H. Y. Wang, S. T. Wu, "Dual-frequency addressed variable optical attenuator with submillisecond response time," Jpn. J. Appl. Phys. 44, 1292-1295 (2005).

N. A. Riza, N. Madamopoulos, "Compact switched-retroreflection-based 2$\,\times\,$2 optical switching fabric for WDM applications," J. Lightw. Technol. 23, 247-259 (2005).

D. M. Maron, D. T. Neilson, D. S. Greywall, C. S. Pai, N. R. Basavanhally, V. A. Aksyuk, D. O. Lopez, F. Pardo, M. E. Simon, Y. Low, P. Kolodner, C. A. Bolle, "Wavelength-selective 1 $\times$ k switches using free-space optics and MEMS micromirrors: Theory, design, and implementation," J. Lightw. Technol. 23, 1620-1630 (2005).

2004 (2)

H. Yuan, W. D. Zhong, W. S. Hu, "FBG-based bidirectional optical cross connects for bidirectional WDM ring networks," J. Lightw. Technol. 22, 2710-2721 (2004).

H. Uetsuka, "AWG technologies for dense WDM applications," IEEE J. Sel. Topics Quantum Electron. 10, 393-402 (2004).

IEEE J. Sel. Topics Quantum Electron. (1)

H. Uetsuka, "AWG technologies for dense WDM applications," IEEE J. Sel. Topics Quantum Electron. 10, 393-402 (2004).

IEEE Photon. Technol. Lett. (2)

Q. R. Huang, F. G. Luo, Z. Wang, M. Xia, J. Hu, J. Yuan, G. Shen, "Parallel-stage-based reconfigurable optical add-drop multiplexer for WDM optical transport networks," IEEE Photon. Technol. Lett. 18, 1864-1866 (2006).

R. Srivastava, R. K. Singh, Y. N. Singh, "Fiber-optic switch based on fiber Bragg gratings," IEEE Photon. Technol. Lett. 20, 1581-1583 (2008).

J. Lightw. Technol. (6)

D. M. Maron, D. T. Neilson, D. S. Greywall, C. S. Pai, N. R. Basavanhally, V. A. Aksyuk, D. O. Lopez, F. Pardo, M. E. Simon, Y. Low, P. Kolodner, C. A. Bolle, "Wavelength-selective 1 $\times$ k switches using free-space optics and MEMS micromirrors: Theory, design, and implementation," J. Lightw. Technol. 23, 1620-1630 (2005).

M. C. Wu, O. Solgaard, J. E. Ford, "Optical MEMS for lightwave communication," J. Lightw. Technol. 24, 4433-4454 (2006).

C. Antoine, X. Li, J. S. Wang, O. Solgaard, "Reconfigurable optical wavelength multiplexer using a MEMS tunable blazed grating," J. Lightw. Technol. 25, 1-8 (2007).

N. A. Riza, N. Madamopoulos, "Compact switched-retroreflection-based 2$\,\times\,$2 optical switching fabric for WDM applications," J. Lightw. Technol. 23, 247-259 (2005).

J. Ertel, R. Helbing, C. Hoke, O. Landolt, K. Nishimura, P. Robrish, R. Trutna, "Design and performance of a reconfigurable liquid-crystal-based optical add/drop multiplexer," J. Lightw. Technol. 24, 1674-1680 (2006).

H. Yuan, W. D. Zhong, W. S. Hu, "FBG-based bidirectional optical cross connects for bidirectional WDM ring networks," J. Lightw. Technol. 22, 2710-2721 (2004).

Jpn. J. Appl. Phys. (1)

X. Liang, Y. Q. Lu, Y. H. Wu, F. Du, H. Y. Wang, S. T. Wu, "Dual-frequency addressed variable optical attenuator with submillisecond response time," Jpn. J. Appl. Phys. 44, 1292-1295 (2005).

Opt. Eng. (1)

S. P. Wang, C. H. Cheng, Y. Q. Lu, C. Wong, "Dynamic channel blocker/equalizer with high blocking extinction ratio," Opt. Eng. 47, 025003- (2008).

Opt. Exp. (2)

K. Maru, Y. Abe, "Low-loss, flat-passband and athermal arrayed-waveguide grating multi/demultiplexer," Opt. Exp. 15, 18351-18356 (2007).

X. J. Wang, Z. D. Huang, J. Feng, X. F. Chen, X. Liang, Y. Q. Lu, "Liquid crystal modulator with ultra-wide dynamic range and adjustable driving voltage," Opt. Exp. 16, 13168-13174 (2008).

Other (1)

I. C. Khoo, S. T. Wu, Optics and Nonlinear Optics of Liquid Crystal (World Scientific, 1993).

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