NIST logo

Publication Citation: 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

NIST Authors in Bold

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
Research Areas: Optoelectronics