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Optical beat noise reduction in subcarrier multiplexed optical link using dual current modulation of master and slave lasers

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5 Author(s)
Yong-Yuk Won ; Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea ; Hyun-Do Jung ; Sang-Kook Han ; Eui-Suk Jung
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A novel method to reduce optical beat noise (OBN) which is critical in subcarrier multiplexed-based optical access link is suggested. The chirped optical signal was generated by using dual current modulation through master and slave lasers. The sidelobes of the slave laser decreased up to -90 dBm close to the noise floor. The OBN was reduced by 20 dB because of the spectral broadening of the slave laser resulted from the increased chirp.

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Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 1 )