IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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Volume 2, Issue 23
Displaying 1-3 of 3 articles from this issue
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LETTER
  • Planar lightwave circuit dispersion compensator using a compact arrowhead arrayed-waveguide grating
    Takanori Suzuki, Kenichi Masuda, Hiroshi Ishikawa, Yukio Abe, Seiichi ...
    2005 Volume 2 Issue 23 Pages 572-577
    Published: 2005
    Released on J-STAGE: December 10, 2005
    DOIhttps://doi.org/10.1587/elex.2.572
    JOURNAL FREE ACCESS
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    An ultra-compact chromatic dispersion compensator, based on a compact arrowhead arrayed-waveguide grating (AWG), has been proposed and fabricated. A dispersion compensating mirror, monolithically integrated into the second slab of the AWG, modulates the phase of each spectral component of the input light. The use of the compact arrowhead structure provides a dispersion compensator with a small footprint. The chromatic dispersion, the bandwidth and the insertion loss of the dispersion compensator based on the 8ch, 12.5GHz-spacing high-resolution arrowhead AWG are 123ps/nm, 70GHz and 7.5dB, respectively. Dispersion compensation experiments for 40Gbit/s, NRZ and RZ signals have been successfully demonstrated.
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  • High-speed optical switching of InAlGaAs/InAlAs multi-mode interference photonic switch with partial index-modulation region (MIPS-P)
    S. Kumai, T. Ishikawa, A. Okazaki, K. Utaka, H. Amanai, K. Kurihara, K ...
    2005 Volume 2 Issue 23 Pages 578-582
    Published: 2005
    Released on J-STAGE: December 10, 2005
    DOIhttps://doi.org/10.1587/elex.2.578
    JOURNAL FREE ACCESS
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    Advanced photonic networks require high-speed switching in nano-second order switching time, low power consumption and low crosstalk, etc. For these purposes we proposed a semiconductor multi-mode interference photonic switch with partial index-modulation regions (MIPS-P) which can operate by current injection for refractive index change and is expected as a high-speed optical switch. In this letter we have experimentally confirmed small-current and low-crosstalk operation by using InAlGaAs/InAlAs, which is effective for injected carrier confinement. And also high-speed switching operation in a switching time of about 1.5ns has been demonstrated, for the first time, at a repetition rate of 10MHz.
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  • Performance evaluation of FH-OCDMA in the presence of GVD and SPM
    Ng Wai Ling, F. M. Abbou, A. Abid, H. T. Chuah
    2005 Volume 2 Issue 23 Pages 583-588
    Published: 2005
    Released on J-STAGE: December 10, 2005
    DOIhttps://doi.org/10.1587/elex.2.583
    JOURNAL FREE ACCESS
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    Performance analysis is carried out to evaluate Frequency-Hopping Optical Code Division Multiple Access (FH-OCDMA) in the presence of group velocity dispersion (GVD) and self-phase modulation (SPM). It is found that the system suffers higher power penalty as the dispersion increases. At a distance of 200-km the power penalty is reduced to 1dB for DSF and to approximately 7dB for SMF when SPM is included. The SMF without SPM suffers the highest power penalty of 6.7dB at 100-km and 9.5dB at 200-km.
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