Optical Communications

The CPQD Optical Communications platform technologies contribute to the constant perfection of optical networks – which is the main physical infrastructure for IP traffic flow, in other words, the telecommunications “backbone”. This evolution is taking place in the areas of long-distance transmission systems and devices, metropolitan area networks and data center access and interconnection, constantly increasing link capacity and coverage. CPQD also develops systems for monitoring and controlling the performance of devices that make up optical networks, using Software Defined Networking (SDN). Research and development projects of integrated photonic and micro-electronic devices have also been conducted.

CPQD has drawn worldwide attention by reaching consecutive record-breaking transmission capacity rates, using technologies such as direct detection as well as coherent detection that minimize the cost of devices and systems.

The main know-how of the Optical Communications platform includes:

Optical Systems

Comprising scenarios for the application of optical technologies that support several different levels of capacity and transmission ranges, such as:

  • Optical access (1-10 Gb/s, ~60 km)
  • Data center interconnect (10-400 Gb/s, ~80 km)
  • Metropolitan (100/200 Gb/s, ~600 km)
  • Long distance (100/200/400 Gb/s, ~2000 km)

Amplification Technology

Technologies and devices for signal amplification in long- and short- range WDM systems, such as EDFA (Erbium Dopped Fiber Amplifier), Raman, hybrid amplifier, remote amplifier etc.

Optical Routing

Optical wavelength routing technology in WDM (Wavelength-Division Multiplexing) networks with OTN (Optical Transport Network) protocols, including ROADM (Reconfigurable Optical Add-Drop Multiplexer) optical routers based on WSS (Wavelength Selective Switch), with 50/100 GHz spacing and support for flexible 12.5 GHz spacing granularity.

Data Transmission

Optical fiber data transmission technologies that use advanced modulation formats, such as m-QAM, m-PSK and intensity modulation formats (m-PAM) to reach bit rates of 10 Gb/s, 100 Gb/s, 200 Gb/s and 400 Gb/s in the line and client interfaces.

Digital Signal Processing

Digital Signal Processing (DSP) technology compatible with integrated circuit (ASIC) implementation for the generation and reception of optical channels at different bit rates, i.e., from 10 Gb/s to 400 Gb/s, and that support different application systems for long-distance transmission.

Channel Coding

Channel coding technology based on FEC (Forward Error Correction), compatible with integrated circuit (ASIC) implementation for error correction during transmission, based on hard decision and soft decision decoding, and of the information space domain (binary codes) or of the signal space domain (coded modulation).

Photonic Devices

Photonic circuit devices and technologies integrated in SOI (Silicon), Polymer, PLC (Silica) and InP (Indium Phosphide). Photonic circuit designs and projects for optical devices such as passive components, lasers, modulators and receivers. Advanced packaging technologies and alignment between chips and blocks of fibers, and free space optics communication. Optical and electric-optical characterization (DC and RF) of photonic circuits at the chip level.

Microelectronic Devices

ASIC-DSP device, with FinFET 16 nm technology, for digital signal processing in the physical layer for optical transmission/reception, developed for both long-distance (5000 km) and short-distance (1000 km) applications, compatible with QPSK, 8QAM, 16QAM and 64QAM modulation formats; ASIC-OTN device, with TSMC 40 nm technology, for digital data processing, in the transport layer, ITU-T G.709 and ITU-T G.798 compatible, for transponder Ethernet 100G applications, OTN regeneration, OTN encryption, and 3R regeneration; ASIC design flow incorporating high-level design stages, RTL development, synthesis and verification.

Optical Network Monitoring and Control

Technologies for monitoring optical performance parameters such as the WDM optical channel power, optical fiber reflectometry (OTDR), and optical fiber aging for decision-making support at the network level layer.

Conformance and Performance Evaluation

Test technology to evaluate the conformance and performance of the equipment comprising the optical communications systems.