Overview

This document presents five sets of 100G interconnection solutions for cross‑cabinet and cross‑floor scenarios within data centers, all adopting a dual‑fiber architecture. Solution forms include simple point‑to‑point direct connection, passive DWDM colored‑light multiplexing, active WDM aggregation, and switch cluster interconnection. Passive solutions rely on DWDM line‑side optical modules directly plugged into switches paired with passive mux/demux to realize transmission without any active devices. If customers cannot replace the existing 100G LR4 optical modules on switches, active WDM solutions equipped with OTU wavelength‑conversion boards can be selected for flexible adaptation, catering to scenarios with different cabling scales and equipment‑modification constraints.

Interconnection Solution #1:  4×100G 20KM Dual‑Fiber

Solution Description

Deploy one 4‑channel CWDM wavelength‑division multiplexing device at the local station and the remote station respectively, together with QSFP28 100G CWDM1 LR1 modules. This enables up to four channels of 100G short‑reach dual‑fiber interconnection. The entire solution requires no active devices or dispersion compensation; optical modules are plugged directly into switches.

Interconnection Solution #2: 5×100G 20KM Dual‑Fiber

Solution Description

Deploy one 4‑channel CWDM wavelength‑division multiplexing device at the local station and the remote station respectively, along with QSFP28 100G CWDM1 LR1 modules and QSFP28 100G BIDI 30KM modules (1304 nm /1309 nm). Up to five channels of 100G short‑reach dual‑fiber interconnection can be achieved. This solution uses two single‑fiber bidirectional 100G modules for transmission over the 1310 nm port without mutual interference, adding one extra 100G channel compared with Solution 1. No active devices or dispersion compensation are required for the full solution; optical modules plug directly into switches.

Interconnection Solution #3: 16×100G 30KM Dual‑Fiber

Solution Description

Deploy one 16‑channel O‑BAND DWDM wavelength‑division multiplexing device at the local station and remote station respectively, paired with QSFP28 100G O‑BAND 40KM modules, supporting up to 16 channels of 100G short‑reach dual‑fiber interconnection. No active devices or dispersion compensation are needed for the entire solution. Optical modules plug directly into switches.

Interconnection Solution #4: 20×100G 2KM Dual‑Fiber

Solution Description

Deploy one 40‑channel C‑BAND DWDM wavelength‑division multiplexing device (with 1310 nm port) at both local and remote stations, with QSFP28 100G DWDM PAM4 CS dual‑wavelength modules to achieve 20‑channel 100G short‑reach dual‑fiber interconnection. The 1310 nm port can further expand one additional 100G channel via either QSFP28 100G O‑BAND DWDM or QSFP28 100G 1310 nm LR4 optical module. The complete solution uses no active devices or dispersion compensation; optical modules plug directly into switches.

Interconnection Solution #5: 10G/100G Mixed Transmission Dual‑Fiber (Max. 80 KM)

Solution Description

Deploy one 40‑channel C‑BAND DWDM wavelength‑division multiplexing device (with 1310 nm port) at local and remote stations. Adopt QSFP28 100G DWDM ZR DCO coherent optical modules or SFP+ 10G DWDM optical modules to implement multi‑channel mixed short‑reach dual‑fiber interconnection for 10G and 100G services. The 1310 nm port supports one extra 100G expansion channel with either QSFP28 100G O‑BAND DWDM or QSFP28 100G 1310 nm LR4 module. This solution requires no active devices, no EDFA amplification, and no dispersion compensation. Optical modules can be directly inserted into switches. For higher‑rate bandwidth transmission, add 400G Muxponder boards, CFP2 400G DCO coherent modules and QSFP28 100G 1310 nm LR4 optical modules to obtain larger bandwidth, especially suitable for short‑reach interconnection scenarios in data centers.