For the implementation of digital multimedia communication, an efficient, reliable,
deterministic transmission system plays a vital role. Quadrature amplitude modulation (QAM) …

We propose a novel method to measure chirp of an electro-absorption modulator in vector
space due to intensity modulation at any frequency using optical homodyne quadrature …

Optical quadrature amplitude modulation (QAM) has attracted considerable attention
because of its high spectral efficiency. For high capacity, the modulation rate should also be …

Experiment investigation of nonlinear distortion in QAM constellation due to imbalance in
intradyne coherent receiver Page 1 Abstract We experimentally investigate the nonlinear …

16-QAM Signal Generation and Constellation Monitoring by Software Synchronized Linear
Optical Sampling Page 1 AF2F.52.pdf ACP/IPOC 2013 © OSA 2013 16-QAM Signal Generation …

To increase the data rates of fiber-optic communication systems, modulation formats with
higher spectral efficiency and/or higher power efficiency than binary formats are of great …

We realized high-speed and low driving voltage InP-based Mach Zehnder modulators with
an npin high-mesa waveguide structure and traveling-wave electrodes. A full C-band 40 …

We propose a general method to monitor the impairments in high speed multilevel signal
modulation format generation induced by improper setting and time-drifting of modulator …

In the multilevel phase modulation which is expected to provide the nextgeneration
modulation format for optical communications, the insertion losses of the optical transmitters …

We review our recent progress toward 100 Gbps and beyond, focusing on integrated optical
devices. Topics include our recently developed integrated optical front-ends for 100 Gbps …