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http://dx.doi.org/10.3807/KJOP.2003.14.4.351

12.5-GHz interleaved bidirectional ultra-dense WDM transmission using the beat-frequency-locking method  

이재승 (광운대학교 전자공학과)
김상엽 (광운대학교 전자공학과)
서경희 (성신여자대학교 컴퓨터정보학부)
Publication Information
Korean Journal of Optics and Photonics / v.14, no.4, 2003 , pp. 351-354 More about this Journal
Abstract
We present a 12.5-GHz interleaved bidirectional ultra-dense wavelength-division-multiplexing transmission over a conventional single mode fiber of 80 km achieving spectral efficiency as high as 0.8-bit/s/Hz. The beat-frequency-locking method is used to stabilize the channel frequency within $\pm$200 MHz error. To facilitate the identification of multiple beat frequency signals, we use a radio-frequency spectrum analyzer. The bidirectional transmission penalty is about 0.3 dB compared with the unidirectional transmission over the same fiber.
Keywords
beat-frequency-locking; bidirectional transmission system; ultra-dense wavelength division multiplexing;
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