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Author: search.filters.author.Sae-Tang, K.Subject: search.filters.subject.FDTD

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    The maximum transmission rate for the silicon-based racetrack microresonator
    (2005-12-01)
    Somkuarnpanit, S.
    ;
    Khuntaweetep, S.
    ;
    Sae-Tang, K.
    This paper determines the possibly maximum rate for the optical signal transmitting thorough the racetrack resonator devices. The method of finite-difference time-domain was employed to determine how an optical impulse getting through the device. We observe that the signal requires a certain number of round-trips to couple the signal to the throughput, and causes the delay of the pulse outputting from the device. This indicates that the possible pulse width is in a range of picoseconds, which corresponding to the maximum transmission rate of over a hundred gigabits per second. © 2005 IEEE.
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    A novel wavelength sensor using a structure of optical directional coupler
    (2002-12-01)
    Sae-Tang, K.
    ;
    Somkuarnpanit, S.
    ;
    Khuntaweetep, S.
    This paper proposes a wavelength sensor based on the optical directional coupler. The finite-difference time-domain (FDTD) is used in analysis of the field intensity of the light propagating thorough the structure. The device with the width of 0.4 μm and the thickness of 0.4 μm, corresponding with the coupling length of 40μm, would provide the linear relationship between the coupling efficiency against the wavelength. The device can be employed to sense the wavelength in a range between 1.5 μm and 1.6 μ, with continuous resolutions. The wide wavelength could be also done by paralleling the light to a number of wavelength-sensing modules with particularly required bands. Therefore, the proposed structure could be employed as the wavelength sensing for most optical communications, optoelectronics and laser applications.