Abstract

An integrated, cascaded, asymmetric GaAs/AlGaAs Mach-Zehnder (MZ) interferometer, for use in wavelength filtering and time-domain multiplexing, has been designed, fabricated, and tested. This device employs several new passive components, including height-tapered Y-branches, for uniform splitting and recombining, and index-tailored waveguide bends, for low-loss operation. The waveguide bend is designed with a predistorted index profile for minimizing both transition loss and radiation loss. The circuit is fabricated with a resistless, light-induced local etching technique, which enables rapid iterative fabrication of the device geometry to achieve the desired operating path delays. Acting as a wavelength filter, the fabricated device has a {-}24.3 dB minimum-to-maximum extinction ratio and a {-}10.5 dB side-lobe suppression ratio. Acting as a pulse-rate multiplexer, the device generates a four-pulse train with a 10-ps pulse-to-pulse separation and an amplitude uniformity of 80% for each input pulse.

[IEEE ]

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  1. H. H. Yaffe, C. H. Henrry, M. R. Serbin, and L. G. Cohen, "Resonant coupler acting as add-drop filters made with silica-on-silicon waveguide technology," J. Lightwave Technol., vol. 12, pp. 1010-1014, 1994.
  2. E. L. Wooten, R. L. Stone, E. W. Miles, and E. M. Brandley, "Rapid tunable narrowband wavelength filter using LiNbO3 unbalanced Mach-Zehnder interferometers," J. Lightwave Technol., vol. 14, pp. 2530-2536, 1996.
  3. M. Kuznetsov, "Cascaded coupler Mach-Zehnder channel dropping filter for wavelength-division-multiplexed optical systems," J. Lightwave Technol., vol. 12, pp. 226-230, 1994.
  4. R. J. Deri, A. Yi-Yan, R. J. Hawkins, and M. Seto, "GaAs/AlGaAs integrated-optic wavelength demultiplexer," Opt. Lett., vol. 13, pp. 1047-1049, 1988.
  5. R. R. Hayes and D. D. Yap, "GaAs spiral optical waveguides for delay-line applications," J. Lightwave Technol., vol. 11, pp. 523-528, 1993.
  6. F. Zamkotsian, K. Sato, H. Okamoto, K. Kishi, I. Kotaka, M. Yamamoto, Y. Kondo, H. Yasaka, Y. Yoshikuni, and K. Oe, "Monolithic integration of MQW modulators on an optical multiplexer on InP for 100 Gb/s transmission," J. Lightwave Technol., vol. 14, pp. 2344-2352, 1996.
  7. G. Wenger, L. Stoll, B. Weiss, M. Schienle, R. M ller-Nawrath, S. Eichinger, J. M ller, B. Acklin, and G. M ller, "Design and fabrication of monolithic optical spot size transformers (MOST's) for highly efficient fiber-chip coupling," J. Lightwave Technol., vol. 12, pp. 1782-1790, 1994.
  8. M. K. Smit, E. C. M. Pennings, and H. Block, "A normalized approach to the design of low-loss optical waveguide bends," J. Lightwave Technol., vol. 11, pp. 1737-1742, 1993.
  9. T. Yamamoto and M. Koshiba, "Analysis of propagation characteristics of whispering gallery modes in a dielectric disk or a curved rectangular dielectric waveguide," J. Lightwave Technol., vol. 11, pp. 400-404, 1993.
  10. M. G. Daly, P. E. Jessop, and D. Yevick, "Crosstalk reduction in intersecting rib waveguides," J. Lightwave Technol., vol. 14, pp. 1695-1698, 1996.

J. Lightwave Technol. (9)

H. H. Yaffe, C. H. Henrry, M. R. Serbin, and L. G. Cohen, "Resonant coupler acting as add-drop filters made with silica-on-silicon waveguide technology," J. Lightwave Technol., vol. 12, pp. 1010-1014, 1994.

E. L. Wooten, R. L. Stone, E. W. Miles, and E. M. Brandley, "Rapid tunable narrowband wavelength filter using LiNbO3 unbalanced Mach-Zehnder interferometers," J. Lightwave Technol., vol. 14, pp. 2530-2536, 1996.

M. Kuznetsov, "Cascaded coupler Mach-Zehnder channel dropping filter for wavelength-division-multiplexed optical systems," J. Lightwave Technol., vol. 12, pp. 226-230, 1994.

R. R. Hayes and D. D. Yap, "GaAs spiral optical waveguides for delay-line applications," J. Lightwave Technol., vol. 11, pp. 523-528, 1993.

F. Zamkotsian, K. Sato, H. Okamoto, K. Kishi, I. Kotaka, M. Yamamoto, Y. Kondo, H. Yasaka, Y. Yoshikuni, and K. Oe, "Monolithic integration of MQW modulators on an optical multiplexer on InP for 100 Gb/s transmission," J. Lightwave Technol., vol. 14, pp. 2344-2352, 1996.

G. Wenger, L. Stoll, B. Weiss, M. Schienle, R. M ller-Nawrath, S. Eichinger, J. M ller, B. Acklin, and G. M ller, "Design and fabrication of monolithic optical spot size transformers (MOST's) for highly efficient fiber-chip coupling," J. Lightwave Technol., vol. 12, pp. 1782-1790, 1994.

M. K. Smit, E. C. M. Pennings, and H. Block, "A normalized approach to the design of low-loss optical waveguide bends," J. Lightwave Technol., vol. 11, pp. 1737-1742, 1993.

T. Yamamoto and M. Koshiba, "Analysis of propagation characteristics of whispering gallery modes in a dielectric disk or a curved rectangular dielectric waveguide," J. Lightwave Technol., vol. 11, pp. 400-404, 1993.

M. G. Daly, P. E. Jessop, and D. Yevick, "Crosstalk reduction in intersecting rib waveguides," J. Lightwave Technol., vol. 14, pp. 1695-1698, 1996.

Opt. Lett. (1)

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