This tutorial highlights challenges and opportunities in achieving efficient flexible optical
networks. Optical signal processing may potentially increase network flexibility because of …

All-optical signal processing has always been critical assistance for the flexible optical
networks (FONs) development which realizes various signal processing functions in all …

An all-optical aggregation and de-aggregation scheme between one 8-ary quadrature
amplitude modulation (8QAM) signal and three binary phase shift keying (BPSK) signals is …

This paper highlights certain optical signal processing (OSP) functions that can be achieved
when using optical frequency combs. An optical frequency comb can provide many narrow …

We propose and experimentally demonstrate a phase-sensitive optical processor, capable
of generating two codirectional and π-phase-shifted phase-sensitive amplifiers (PSAs) in a …

A phase-sensitive four-wave mixing (FWM) scheme enabling the simultaneous conversion
of the two orthogonal quadratures of an optical signal to different wavelengths is …

Phase-sensitive cascaded second-harmonic generation and difference-frequency
generation in a periodically poled lithium niobate waveguide allow converting two …

Flexible conversion between multilevel modulation formats is one of the key processing
functions to realize adaptive modulation techniques for flexible networking aimed at high …

We experimentally demonstrate tunable all-optical simultaneous de-aggregation of multiple
wavelength 16-QAM channels into two 4-PAM channels using a single stage nonlinear …

We report on quadrature demultiplexing of a quadrature phase-shift keying (QPSK) signal
into two cross-polarized binary phase-shift keying (BPSK) signals with negligible penalty at …