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|Author(s):||Jeffrey A. Jargon; Xiaoxia Wu; Louis Christen; Scott Nuccio; Omer F. Yilmaz; Loukas Paraschis; Yannick K. Lize; Alan Willner;|
|Title:||Synchronization monitoring of I/Q data and pulse carving misalignment for a serial-type 80-Gb/s RZ-DQPSK transmitter through optical/RF clock tone measurement|
|Published:||August 04, 2008|
|Abstract:||We experimentally demonstrate a monitoring technique for determining misalignment between the in-phase/ quadrature (I/Q) data streams and between the data and pulse carving in an 80 Gb/s serial-type return-to-zero differential quadrature phase-shift-keying (RZ-DQPSK) transmitter. By measuring optical clock tone power and the radio frequency (RF) clock tone power, a monitoring-power-dynamic-range (MPDR) of 8 dB is obtained for I/Q data misalignment and 6 dB for data/pulse carving misalignment.|
|Citation:||IEEE Photonics Technology Letters|
|Keywords:||fiber optics communications, return-to-zero differential quadrature phase-shift-keying (RZ-DQPSK), synchronization monitoring|