Open ZR+ Ready Coherent Optical Modules

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Simplify network expansion with fully interoperable 100G–800G QSFP-DD Open ZR+ transceivers. Access, Aggregation, and Core in one technology.
Supported by: Cisco · Juniper · Nokia · Arista · Ciena · Huawei
Access to Core

One unified technology

120 km Reach

with POLS QSFP28 optics

0 dBm Modules

Deployment‑ready optics

10+ Deployments

Across Poland

Do these challenges sound familiar?

High Total Cost of Ownership (TCO)

Limited network scalability

Difficulty maximizing link efficiency within budget constraints

Incompatibility with existing network infrastructure

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Where do you want to use coherent optical transceivers?

Choose the part of the network infrastructure and discover how it can be enhanced with coherent optical modules.
ACCESS
ACCESS
AGGREGATIONS
AGGREGATIONS
CORE
CORE
Coherent optical transceivers are ideal for optimizing DWDM systems towards IP-over-DWDM. This approach allows optical transport modules to be installed directly in IP devices - such as routers or switches - eliminating the need for transponders in the network.

Discover the best networks
with our solutions.

Module 100G
Module 400G
Module 800G
Implementing 100G technology in access networks
The adoption of 100G technology has become a hot topic in access networks, with a wide range of potential deployment areas, including uplinks for OLTs and DSLAMs, mobile base stations, and enterprise customers. The diversity of these applications drives operators to seek the most effective solutions. To meet these needs, we offer multiple 100G solutions tailored to address customer requirements as accurately as possible.
Coherent modulation goes beyond amplitude modulation by also modulating the phase and polarization of the signal. This allows more data to be transmitted at the same laser speed. However, coherent modulation requires more complex signal processing. Since it sends not just light amplitude (intensity) but a set of points (constellations), decoding this signal demands complex mathematical operations. Consequently, a Digital Signal Processor (DSP) with significant computing power is needed to perform these calculations.
Applications:
  • 100G over existing DWDM network
  • 100G DWDM network
  • 100G point to point DWDM with POLS
400G links: essential for aggregation and core networks
400G links have become a mandatory requirement for aggregation and core network links. With the advent of QSFP-DD transceivers featuring built-in coherent DSP, these modules can be directly plugged into IP devices, such as switches or routers, a concept known as IP over DWDM. This approach has been a staple in the telecommunications industry for over 20 years. The simplest application of these transceivers is point-to-point connections over dark fiber, with distances reaching up to 100 km.
From a Total Cost of Ownership (TCO) perspective, the most cost-effective solution is running 400G links over a DWDM network. One current challenge is that some aggregation nodes still lack QSFP-DD slots. Thanks to the standardization around 400G DCO transceivers, hybrid solutions are possible. For instance, in a core node, a 400G transceiver can be installed directly into an IP device, configured for a host-side application of 4x100G. On the other side, a muxponder can be used to connect Nx100G to a 100G device. Additionally, for operators needing to install ultra-long-haul links, this application can be accomplished using standard ZR+ transceivers and a "super channel."
Applications:
  • 400G point to point over dark fiber
  • 400G point to point DWDM with POLS
  • 400G point to point DWDM
  • 400G over DWDM
  • 400G hybrid – IPoDWDM + muxponder
  • 400G Ultra Long Haul
800G technology: A leap forward in high-speed networking
800G technology, presented in the QSFP-DD form factor, made its debut at OFC 2024 and will be ready for sale in Q4 2024. This advancement is the result of continuous development of 400G coherent technology, bringing standardized transmission modes based on the OpenZR+ standard and functionalities defined by the OpenROADM standard, including interoperable Probabilistic Constellation Shaping (PCS).
800G technology will also support 600G and 400G transmission modes, offering significantly improved OSNR (Optical Signal-to-Noise Ratio) tolerance. The high output power of 800G coherent modules will require 150 GHz DWDM channel spacing.
Applications:
  • 800G over DWDM using 400G transceivers
  • 800G muxponder
  • 1.6T super channel

Check out the GBC Photonics technology that boost your networks

Coherent
Universal transponder
Universal optical transceivers
Coherent modulation. Enhancing spectral efficiency in modern networks.
Coherent modulation uses three parameters to encode the transmitted data – amplitude, phase and polarization. It requires complicated real time mathematical operations done on the received signal to decode the data stream. Because of that, DSP – Digital Signal Processor – must be used in modules with coherent modulation. Before the QSFP-DD era, coherent modules were bulky and power-intensive, utilizing CFP interfaces.
However, these devices were impractical for routers due to their size and power supply requirements. DSP accounting for nearly half of the coherent module's power consumption, so with advancements in CMOS technology, it has become feasible to develop DSPs that can fit comfortably within the compact housing of QSFP-DD 400G and 800G modules, ideal for achieving high port density in routers and switches.
Nowadays we even have specialized DSP for QSFP28 100G coherent modules, with power consumption below 2W and 5.5 W for the whole optical module. According to Shannon law defined more than 70 years ago we are not able to rise the throughput of the transmission channel indefinitely. Limitations are signal-to-noise ratio and the channel width. Coherent modulation is the most efficient way to maximize the spectral efficiency – the data rate of the single channel divided by the channel bandwidth.
Applications:
  • 100G DWDM coherent
  • All 400G and all 800G
  • 100G, 400G, 800G DWDM
  • Short, Metro and Long Haul
Coherent modulation. Enhancing spectral efficiency in modern networks.
It’s very challenging for operators to deal with offers from many suppliers. It results in network complexity and management “nightmare”. There are a lot of “vendor specific” solutions which are not compatible with anything else. Once Operater Operator select such solution, become “prisoner" of certain brand. This is the reason why we have decided to develop it in another way.
To provide universal solution to the customer. Imagine transponder card with 10x 800G QSFP-DD slots, with fully non blocking matrix, supporting all 100G, 400G and 800G transceivers in any combination, with transponder or muxponder option. All ports could be even equipped with coherent QSFP-DD 800G modules.
Fully supporting both CMIS and SFF standards to rule them all  - 100ZR, 400 ZR/ZR+, 800 ZR/ZR+ and all kinds of direct detect transceivers. With universal optical transceivers and SRD programming box it gives huge amount of possible application with just 5 products.
Applications:
  • 400G hybrid – IPoDWDM + muxponder
  • 400G Ultra Long Haul
  • 800G over DWDM using 400G transceivers
  • 800G muxponder
  • 1.6T super channel
Universal optical transceivers
Achieve total flexibility with Smart Recode Device (SRD 5)
The philosophy behind truly universal optical transceivers is rooted in the Smart Recode Device (SRD) foundation. This technology allows the same optical module to be used across a variety of network devices—routers, switches, transponders, muxponders, and servers—regardless of brand. With just a few clicks on a laptop or smartphone, a universal transceiver can be configured to work with any network device, eliminating the need for extensive spare part inventories.
No more money frozen in a huge stock of spares. Universal optical transceivers can be programmed with SRD just before installation, providing one module with dozens of possible implementations. This innovation offers total freedom for your network, ensuring flexibility and efficiency in network management.
Applications:
  • 400G hybrid – IPoDWDM + muxponder
  • 400G Ultra Long Haul
  • 800G over DWDM using 400G transceivers
  • 800G muxponder
  • 1.6T super channel

Network optimization

made easy

A coherent optical module performs the same functions as a transponder but does so directly at the port of a network device. This gives you access to much more diagnostic information than standard direct detect transceivers.For example, you can easily find information about the supported applications and laser settings, like the available wavelengths and how precisely you can adjust them.How many photons can one bit of information be read from? The IP-over-DWDM revolution with 400G coherent optical transceivers

Unmatched features for

superior performance

High throughput

Coherent plugs can transmit data at speeds of up to 800Gbps, making them some of the most efficient devices on the market.

Long transmission distance

Coherent technology enables signals to be transmitted over much longer distances while maintaining high signal quality, surpassing other solutions.

Low operating costs

Coherent modules deliver high transmission quality with minimal distortion, resulting in fewer errors and reduced operating costs.

Very high accuracy

By using coherent modules, the need for signal amplifiers is significantly reduced, further lowering operating costs.

Simple installation

Coherent modules are easy to install and configure, allowing for faster and more efficient deployment in existing networks.

Applications

what do we need?

For most applications, we only need three or even two products! (Excluding the components of the transmission system that transport the data)

  • Coherent Optical Transceiver
    ‍    QSFP28 100G, QSFP-DD 400G, or soon, QSFP-DD 800G
  • Universal Transponder (optional)
    10xQSFP-DD/QSFP28
  • Optical Transceiver Programmer
    ‍    SRD 5