company news about TS-QD-CO4H-ZRPC: Scale Metro and DCI Networks with 400G Open ZR+ Coherent Pluggables

The innovative TS-QD-CO4H-ZRPC 400G QSFP-DD Open ZR+ Coherent Module establishes a new benchmark for ultra-high-speed network connectivity across modern cloud infrastructure. Engineered explicitly to address the escalating data loads within hyper-scale data centers, this high-performance optical transceiver integrates advanced coherent optics within a highly standardized pluggable form factor. Operating across the full C-band wavelength spectrum, the module enables multi-rate flexibility spanning 100G up to 478.75 Gbps. By combining a 7nm digital signal processor (DSP) with versatile software-defined modulation formats such as PM-QPSK and PM-16QAM, the product delivers a cost-efficient alternative to bulky transponder shelves. This strategic innovation drastically mitigates power overheads and real estate footprints while maintaining a massive optical reach of up to 2000 km, empowering global enterprise network operators and telecom service providers to scale their underlying fiber assets effortlessly.

The TS-QD-CO4H-ZRPC 400G QSFP-DD Open ZR+ Coherent Module is a standardized, hot-pluggable optical transceiver that unifies advanced software-defined modulation with compact optoelectronic packaging. Built upon the Quad Small Form-factor Pluggable Double Density (QSFP-DD) structural outline conforming to Hardware-Rev 6.3 and CMIS-Rev 5.2 parameters, this module utilizes an 8×56G PAM4 electrical host interface (8×CEI-56G-VSR) to handle a maximum aggregate line data rate of 478.75 Gbps over standard single-mode fiber (SMF-28).

At the physical and optoelectronic layer, the transceiver features an integrated ultra-narrow line-width tunable laser source covering the entire ITU-T C-Band grids from 1528.77 nm to 1567.13 nm. Frequency stability is strictly governed within a tight tolerance boundary of ±1.5 GHz. The transmission sub-system implements Polarization-Multiplexed Quadrature Phase Shift Keying (PM-QPSK) for long-haul networks and Polarization-Multiplexed 16-Quadrature Amplitude Modulation (PM-16QAM) for maximized capacity configurations.

On the digital side, a cutting-edge 7nm Coherent Digital Signal Processor (DSP) ASIC performs real-time chromatic dispersion (CD) compensation and polarization mode dispersion (PMD) mitigation. This allows a massive CD tolerance window of up to ±40,000 ps/nm under PM-QPSK mode and ±10,000 ps/nm under PM-16QAM mode. The optical receive pathway leverages high-sensitivity coherent mixing detectors coupled with dual balanced receivers, establishing an optimal Optical Signal-to-Noise Ratio (OSNR) tolerance profile of 15 dB for 200G links and 19.5 dB for full 400G payloads. Optical connectivity is executed via a standardized duplex LC/UPC interface.

As cloud-native architectures expand, modern network operations face severe performance bottlenecks regarding available fiber capacity, rack spacing limits, and strict thermal limits. High-speed inter-facility transport historically mandated separate, costly transponder hardware platforms that drove up capital and operational expenses. The TS-QD-CO4H-ZRPC 400G QSFP-DD Open ZR+ module directly eliminates these foundational industry pain points by providing 3-4 critical structural advantages:

• Massive Extended Reach Across Open ZR+ Architecture: Unlike basic 400ZR options capped at short 120 km links, this Open ZR+ compliant engine achieves an amplified reach up to 450 km at full 400G speeds, and up to 2000 km at 100G. This provides flexible regional coverage without requiring frequent optical regeneration sites.

• Unparalleled Multi-Vendor Interoperability: By strictly adhering to the Open ZR+ MSA 2.0 and OIF-400ZR-02.0 open frameworks, the transceiver bypasses proprietary vendor lock-in. Procurement managers can seamlessly deploy this module inside heterogeneous ecosystem switches or routers.

• Minimized Power and Space Profiles: Fitting directly into existing high-density client access ports, the module eliminates discrete, power-hungry external transponder shelves. It maintains a peak maximum power consumption of 24W (20W typical under PM-16QAM), ensuring compliance with tight data center thermal budgets.

• Dynamic Multi-Rate Service Granularity: Software-defined modulation enables a single hardware SKU to run at 100G, 200G, 300G, or 400G operating rates. This simplifies inventory management for telecom infrastructure operators and cloud data center expansion projects.

In real-world deployment topologies, the TS-QD-CO4H-ZRPC 400G QSFP-DD Open ZR+ module serves as the primary high-capacity link for multi-tenant data center interconnect (DCI) solutions and metro optical networks. It plugs directly into native edge routing or core switching chassis, allowing network operators to route IP traffic directly over DWDM lines (IP-over-DWDM or IPoDWDM) without conversion steps.

Consider an enterprise cloud data center interconnect environment bridging two hyperscale installations separated across a 400 km metro link. Under traditional frameworks, 400GE client-side traffic from a switch requires conversion via standalone transponders before entering the DWDM link. With this Open ZR+ module installed, the 400GE client traffic maps into an amplified DWDM line-side signal. The transmitter launches at a default output power of -0.5 dBm, routing directly into multiplexer/demultiplexer systems and optical amplifiers.

Throughout transmission, the integrated 7nm DSP resolves up to 10,000 ps/nm of accumulated chromatic dispersion caused by fiber propagation over the 400 km path. On the receiving end, the incoming optical energy hits the duplex LC/UPC port within an acceptable receiver input power window of 0 to -18 dBm. The module successfully processes the PM-16QAM modulated waveform even when the system's Optical Signal-to-Noise Ratio degrades down to 19.5 dB. For longer regional networks up to 1000 km, the network engineering team can reconfigure the module via software commands to run PM-QPSK at 200G. This optimization expands the chromatic dispersion tolerance to ±40,000 ps/nm and improves OSNR tolerance to 15 dB, ensuring stable performance across fluctuating fiber environments.

Q1: What is the maximum transmission distance supported by this module?

 A1: The TS-QD-CO4H-ZRPC module supports amplified links up to 450 km at 400G, 600 km at 300G, 1000 km at 200G, and up to 2000 km at 100G. Unamplified point-to-point links can reach up to 40 km at full 400G data rates.

Q2: Which industry specifications does this coherent optical module comply with?

A2: The transceiver fully complies with Open ZR+ MSA Version 2.0, OIF-400ZR-02.0, IEEE Std 802.3-2018 standards, alongside QSFP-DD Hardware-Rev 6.3 and Common Management Interface Specification CMIS-Rev 5.2 hardware protocols.

Q3: What are the exact power consumption parameters of this transceiver?

A3: Operating from a standard +3.3V power supply, the module exhibits a typical power consumption of 18W and a maximum of 20W under PM-16QAM modulation. Under PM-QPSK modulation configurations, the typical draw is 22W with a maximum capped at 24W.

Q4: Can this module operate at multiple data speeds or only 400G?

A4: Yes, it is a multi-rate coherent transceiver that natively supports software-defined configurations for 100G, 200G, 300G, and 400G operations, covering services like 400GE, 200GE, and OTU4/OTU CN telecom transport frames.

Q5: What type of optical connectors and fibers are required?

 A5: The module features a standard duplex LC/UPC optical connector interface designed to mate with conventional single-mode fiber (SMF-28) networks, working across the standard tunable C-band wavelength spectrum.

Q6: What are the dispersion and OSNR tolerance limitations at 400G?

A6: At full 400G operation utilizing PM-16QAM modulation, the module provides a chromatic dispersion tolerance of ±10,000 ps/nm and an Optical Signal-to-Noise Ratio (OSNR) tolerance threshold of 19.5 dB.

The introduction of the TS-QD-CO4H-ZRPC coherent transceiver fundamentally transforms the landscape of high-density IP-over-DWDM network design. By packing 400G Open ZR+ compliant long-distance capabilities into a compact, energy-efficient QSFP-DD module, network operators can bypass legacy external transponder systems entirely. This architectural shift significantly cuts down deployment capital costs, optimizes power usage, and streamlines maintenance across complex data center interconnects and metro optical networks.