An all optical network for optical signal traffic has at least a first ring with at least one
transmitter and one receiver. The first ring includes a plurality of network nodes. At least a …

Optical techniques, devices and systems for combining duobinary modulation and optical
subcarrier multiplexing in optical communication applications. An analog mixer is used to …

US8744262B2 - Optical subchannel routing, protection switching and security - Google
Patents US8744262B2 - Optical subchannel routing, protection switching and security …

Related US Application Dat e pplication Uata An all optical network for optical signal traffic
provides at (63) Continuation-in-part of application No. 09/990,196, least a first ring with at …

5,625.478 5,663,820 5,680,235 5,696.614 5,712,716 5,717.795 5,734,493 5,742,416
5,745,273 5,764,821 5,778,118 5,781,327 5,784, 184 5,786,913 5,796,501 5,822,095 …

This invention relates to provisioning wavelength-selective switches and reconfigurable
optical add-drop multiplexers to minimize the bandwidth narrowing effect from the optical …

Demands of modern high-bandwidth services drive the need to constantly improve existing
optical amplification technology beyond its current bounds. In this paper, we demonstrate a …

Techniques, apparatus and systems for optical communications, including fiber ring
networks with protection switching to maintain optical communications when an optical …

A high-speed external modulation scheme for optical continuous-phase frequency-shift
keying (CPFSK) is presented. In external frequency-shift keying (FSK) modulation using …

US7773883B1 - Single-fiber optical ring networks based on optical double sideband
modulation - Google Patents US7773883B1 - Single-fiber optical ring networks based on …