All-Optical Modulation Format Conversion and Applications in Future Photonic Networks

Abstract

A number of all-optical signal processing schemes based on nonlinear optical effects have been proposed and demonstrated for use in future photonic networks. Since various modulation formats have been developed for optical communication systems, all-optical converters between different modulation formats will be a key technology to connect networks transparently and efficiently. This paper reviews our recent works on alloptical modulation format conversion technologies in order to highlight the fundamental principles and applications in variety of all-optical signal processing schemes.

Sampling Parallel SOA-MZIs Configuration for All-Optical Simultaneous Frequency Down-Conversion

“…The two parallel SOA-MZIs were recognized for wavelength conversion in [3][4][5][6]. Based on a three-parallel SOA-MZIs link, the major novelty of our system consists of achieving a simultaneous frequency down-conversion by using a sampling method.…”

“…SOA-MZIs provide a large extinction ratio, low optical input optical power, and positive conversion gains (CGs) [2]. The parallel SOA-MZIs concept [3][4][5][6], which has crucial characteristics, is also used for simultaneous frequency down-conversion by applying a band pass sampling method.…”

All-Optical Modulation Format Conversions from PAM4 to QPSK and 16QAM Using Silicon-Rich Nitride Waveguides

“…All-optical modulation format conversion is a promising technology for realizing low-latency and efficient network connections using different modulation formats [4], [5]. On-off keying (OOK) to PSK format conversions using semiconductor optical amplifiers (SOAs) and highly nonlinear fibers (HNLFs) were first proposed [6], [7].…”

Multi-stage adaptive equalization for all-optical-aggregated 16QAM signal

“…Optical modulation format conversion is one of the more promising technologies for realizing low-latency and efficient connection of networks with different modulation formats [3]. For inter-DC networks, optical format conversions from PAM4 to QPSK and 16QAM using highly nonlinear fibers (HNLFs) have been proposed [4,5].…”