5 March 2018
Oclaro launches suite of integrated optical components for 400G and 600G networks
© Semiconductor Today Magazine / Juno PublishiPicture: Disco’s DAL7440 KABRA laser saw.
Oclaro Inc of San Jose, CA, USA (which provides components, modules and subsystems for optical communications) is sampling a suite of integrated optical components that enable transmission up to 600Gbp/s per wavelength for long-haul, regional, metro and data-center interconnect (DCI) applications. Components in the portfolio include a 64Gbaud micro-intradyne coherent receiver (micro-ICR), a 64Gbaud integrated coherent transmitter (ICT), a 100kHz micro-integrated tunable laser assembly (micro-ITLA), a 64Gbaud high-bandwidth co-packaged driver modulator (HB-CDM), and a high-bandwidth lithium niobate (LiNbO3) polarization-multiplexed quadrature Mach-Zehnder (PM-QMZ) modulator.
“Oclaro’s world-class photonic integration at the indium phosphide (InP) chip level, combined with our leading packaging expertise, results in the highest-performance, high-density solutions which are ideal for the next generation of line-card solutions at 600Gb/s per wavelength,” claims Beck Mason, president of Oclaro’s Integrated Photonics business. “We have leveraged these capabilities to meet the stringent requirements of our optical system customers without comprising performance, density, power dissipation or cost.”
The micro-ITLA complies with the Optical Internetworking Forum (OIF) micro-ITLA Implementation Agreement and uses Oclaro’s thermally tuned digital supermode-distributed Bragg reflector (DS-DBR) laser technology to reduce low-frequency phase noise and linewidth while also increasing optical output power to above +17dBm, all contained in a reduced size footprint.
The HB-CDM complies with the OIF HB-CDM Implementation Agreement and uses Oclaro’s high-bandwidth InP PM-QMZ modulator chip with a co-packaged matched RF driver. Flexible optical power and high linearity is achieved through the use of semiconductor optical amplifiers (SOAs) integrated within the InP modulator chip.
The high-bandwidth LiNbO3 PM-QMZ modulator is already released to production and shipping.
The 64Gbaud+ ICT combines a narrow-linewidth laser with a high-bandwidth PM-QMZ Mach-Zehnder modulator to support flexible baud rates up to 64Gbaud and 64-QAM modulation. This enables transmission from 100Gbp/s to 600Gbp/s. Built-in SOAs, tunable filter and polarization multiplexer eliminate the need for external optical components and simplify assembly while enabling operation in colorless networks. The ICT provides a local oscillator output with +12dBm EOL power for a mated coherent receiver.
The 64-Gbaud+ ICR is a fully integrated coherent receiver able to support flexible data rates from 100Gbp/s to 600G+. It supports rates up to 64Gbaud with modulation schemes such as 64-QAM. The 64Gbaud ICR has an integrated monitor photodiode (MPD) and variable optical attenuators (VOA) to support single-channel and multi-channel applications in colorless networks. It is compliant with the form factor specified in the OIF Implementation Agreement OIF-DPC-MRX-01.0.
The 64Gbaud ICR almost doubles the bandwidth relative to 32Gbaud parts without change in responsivity. This enables Oclaro’s 64Gbaud ICT-ICR pair to maximize link budgets in both existing and green-field networks while doubling the capacity per channel. The compact form factors and integrated functionality of the 64Gbaud ICT-ICR pair make them suitable for the stringent size requirements on next-generation high-density 600G platforms.
Being showcased in booth #2812 at the Optical Networking and Communication Conference & Exhibition (OFC 2018) in San Diego, CA, USA (11-15 March), Oclaro’s suite of integrated optical components is sampling now and is expected to be in volume production by the end of 2018.