JCO400 Coherent Optical Transceivers Datasheet

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Product Overview

Co-developed by Juniper and an industry-leading optical partner, JCO400 Coherent Optical Transceivers are essential building blocks that enable operators to realize a transformative strategy for 400GbE and beyond in metro, edge, core, and cloud network modernization. Providing best-in-class power efficiency in a footprint-optimized form-factor and innovative software-integration for automation functions, JCO400 coherent DWDM optics eliminate the key operational pain-points of deploying a converged packet-optical solution. Additionally, the JCO400 series optics are compliant to key industry standards and specifications to ensure diversification of supply and seamless interoperability in multivendor environments.


Product Description

Juniper Networks® JCO400-ZR and JCO400-ZR+ Coherent Optical Transceivers are supported by 400GbE-ready router and switch platforms within the Juniper Networks ACX Series Routers, MX Series Routers, PTX Series Routers, and QFX Series Switches. Ideal for access, edge, core, data center, and cloud use cases, JCO400-ZR/ZR+ coherent DWDM optics deliver industry-leading performance and operational simplicity while supporting an open and interoperable networking ecosystem. The lower TCO makes them a compelling value for service providers and cloud providers.

The portfolio includes two offerings:

  • JCO400-ZR
  • JCO400-ZR+

This datasheet provides the preliminary specifications of the JCO400-ZR. Specifications for JCO400-ZR+ will be added to the datasheet in the near future.



JCO400-ZR coherent DWDM optics comes in a universal quad small form-factor double density (QSFP-DD) footprint that can be plugged into any Juniper 400GbE-platforms. JCO400-ZR conforms to the Optical Internetworking Forum (OIF) 400ZR Implementation Agreement (IA) and is well suited for IP-optical integration eliminating coherent DWDM transponders, increasing reliability, lowering cost, reducing power, and minimizing footprint.



JCO400-ZR+ coherent DWDM optics comes in a universal QSFP-DD form factor that can be plugged into any Juniper 400GbE-ready platforms. In addition the JCO400-ZR+ module supports flexible configurations and channelized modes as specified in the OpenZR+ Multi-Source Agreement (MSA). These transceivers employ Open Forward Error Correction (OFEC), which increases data reliability and maximizes overall effective bandwidth. Open and interoperable, the JCO400-ZR+ coherent DWDM pluggable module delivers best-in-class power efficiency and extended reach for metro, regional, and long-haul applications. 


JCO400 Coherent Optical Transceivers

Features and Benefits

Industry-Leading Performance

The JCO400-ZR/ZR+ optics solutions provide best-in-class power efficiency in a footprint-optimized form factor that suits a range of metro, edge, and core network use cases, including data center interconnect, mobile backhaul, next gen packet core networks, and more. JCO400-ZR/ZR+ modules support flexible configurations and channelized modes as specified by the OIF 400ZR IA and OpenZR+ MSA.


Operational Simplicity

JCO400-ZR/ZR+ optic modules help network operators alleviate operational pain points in managing the health of the end-to-end IP/optical solution. For example, the JCO400-ZR/ZR+ optics have the ability to separate the operation of the host and line side interfaces. Separating the operation of the two interfaces enables simplified testing and provisioning of the optical elements of the network, independent of the IP-Ethernet layer. Additionally, Juniper supports the use of standardized OpenConfig models for vendor-agnostic management of 400GbE Coherent DWDM Optics, providing ease of integration, deployment, and network maintenance.


Open and Interoperable

As an active contributing member of the OIF, OpenZR+ MSA, and QSFP-DD MSA among other key optical-standards bodies, Juniper is at the forefront of building open and interoperable networking ecosystems. Juniper leverages a standards-compliant, multivendor ecosystem to seamlessly diversify the component supply chain ensuring stable supply and improved lead times.


Additional Resources

For compatibility questions, check out the Hardware Compatibility Tool. This online resourcecontains a regularly updated database of Juniper’s pluggable transceivers, direct attach cables (DACs), and active optical cables (AOCs), along with information regarding compatibility with Juniper platforms and interface modules.



Standard: IEEE 802.3-2018

Parameters JCO400-QDD-ZR
MSA compliance (SFF, e.g., SFF-8665)
OIF 400ZR Implementation Agreement (IA)
Speed/Mode 400 Gbps Ethernet, 4x100 Gbps Ethernet
Digital diagnostic monitoring (DDM) Module temperature (Celsius)
Pre - FEC bit error rate (BER)
Uncorrected Frame Error Rate (FER)
Signal-to-noise ratio (SNR)
Tx power (dBm)
Rx total power (dBm)
Carrier frequency offset (MHz)
Chromatic dispersion (ps/nm)
Differential group delay (ps)
Polarization dependent loss (PDL) (dB)
Optical signal-to-noise ratio (OSNR) (dB)
Signaling rate, each lane 478.750 Gbps 59.84375 GBd +/- 20 ppm
Modulation format DP-16 quadrature amplitude modulation (QAM)
Forward error correction (FEC) types Concatenated FEC (CFEC)
Channel plan wavelength range 1567.13 nm through 1528.77 nm
Channel plan frequency range 191.3 THz through 196.1 THz
Channel spacing 75 GHz or 100 GHz
Channel tunability 6.25 GHz grid
Optical transmitter output power (on) Min: –10 dBm, Tx output power accuracy: +/–1.5 dB
Optical transmitter output power (off) -20 dBm
Optical transmitter wavelength accuracy +/- 1.8 GHz
Optical transmitter channel tuning time 60 sec
Optical receiver input power range –12 through 0 dBm
Optical receiver damage input power threshold 15 dBm
Optical receiver input sensitivity (unamplified or dark-fiber applications) -20 dBm
Optical receiver minimum OSNR (back-to-back), typical < 26 dB
Optical receiver minimum OSNR (back-to-back), worst-case, EOL 26 dB
Optical receiver chromatic dispersion tolerance +/– 2.4 ns/nm
Optical receiver polarization-mode dispersion PMD tolerance 10 ps (@ 0.7 dB OSNR penalty) 7 ps (@ 0.5 dB Rx sensitivity penalty)
Optical receiver polarization tracking 50 krad/s
Receiver PDL tolerance (dB) 3.5 dB (@ 1.8 dB OSNR penalty) 1.5 dB (@ 0.4 dB Rx sensitivity penalty)
Cable type Single-mode fiber-optic (SMF)
Core size/cladding 9/125 µm
Distance 120 km
Notes for distance <120 km (DWDM amplified, noise limited links), < 40 km (single wavelength unamplified, loss limited links)
Maximum power consumption (W) 19 W
Operating temperature (range) 0° C to 70° C
Storage temperature –40° C to 85° C
Typical weight and dimensions Weight: 85 g +/–5 g; Dimensions: QSFP-DD MSA compliant


NOTE: JCO400-ZR is fully backwards compatible with QDD-400G-ZR in Junos® OS Evolved


Ordering Information

Please contact your Juniper sales representative for product availability.

Product Part Number
JCO400-QDD-ZR 740-157132


Statement of Product Direction

This datasheet contains information related to Juniper’s development and plans for future products, features or enhancements (“SOPD”).  SOPD information is subject to change at any time, without notice.  Except as may be set forth in definitive agreements for a potential transaction, Juniper provides no assurances, and assumes no responsibility, that future products, features or enhancements will be introduced.  Except as may be set forth in definitive agreements for a potential transaction, recipients of this datasheet acknowledge that: a) purchasing decisions are not being made based upon reliance of timeframes or specifics outlined in this SOPD, and b) purchasing decisions would not be affected if Juniper delays or never introduces the future products, features or enhancements.


About Juniper Networks

At Juniper Networks, we are dedicated to dramatically simplifying network operations and driving superior experiences for end users. Our solutions deliver industry-leading insight, automation, security and AI to drive real business results. We believe that powering connections will bring us closer together while empowering us all to solve the world’s greatest challenges of well-being, sustainability and equality.


1000751 - 001 - EN SEPT 2022