We present a novel quaternary optical-modulation scheme based on the combination of
amplitude and phase modulation. The modulator has a simple structure and can be realized …

We assess, both by measurement and simulation, the receiver performance degradation
caused by frequency offsets between the optical source and the delay interferometer for …

The potential for higher spectral efficiency and recent activities in the area of coherent
optical systems raise the interest in new multi-level modulation formats for optical …

We discuss, both by simulation and experiment, the design of balanced differential phase-
shift keying receivers. We study detector amplitude imbalance and phase imbalance …

Increased interest in novel modulation formats for optical transmission has come up in
recent years. Receivers with interferometric direct detection can be used to detect arbitrary …

EP O977382 A2 2, 2000 GB 2311915 A 10, 1997 JP 63-1220 1, 1988 JP 63-52530 3, 1988
JP 63-86608 4f1988 JP 64-5127 1, 1989 JP 64-7727 1, 1989 JP 3-21126 1, 1991 JP 3 …

We discuss the influence of optical and electrical filtering on the performance of beat-noise
limited balanced and single-ended direct detection of return-to-zero differential phase-shift …

Prior Publication Data Reynolds, PC Nov. 10, 2011(57) ABSTRACT A burst-mode phase
shift keying (PSK) communications sys tem according to an embodiment of the present …

In direct-detection differential-phase-shift-keying (DPSK) systems, the signal-spontaneous
emission beat noise introduces phase noise due to Kerr nonlinearity. In wavelength-division …

We present a new optical modulation format chirp-free return-to-zero differential phase shift
keying (CF-RZ-DPSK), which enables wavelength-division-multiplexing (WDM) transmission …