SWDM4 Compare with SR BD

Feb 09, 2025

In Common: optical transceiver with a duplex LC connector interface for short-reach data communication and interconnect applications using MultiMode Fiber (MMF). With a transmitted distance of up to 100m by OM3 and 150m by OM4.

Different: SR Bidi is two optical lanes over a 2-fiber duplex LC optical multi-mode fiber. The Cisco QSFP -00G-SR1.2 BiDi operates 50Gb PAM4 channels, for a total aggregate bandwidth of 100Gb. PAM4 technology enables 50Gb data rate with signaling at 25Gbaud rates. For QSFP-40G-SR-BD consists of two 20-Gbps transmit and receive channels in the 832-918 nanometer wavelength range.

Popular Cisco models are: QSFP-40G-SR-BD; QSFP-40/100-SRBD; QSFP-100G-SR1.2

SWDM4 transceiver multiplexes four wavelengths on each simplex fiber, for 40G is 10G per wavelength, 4x10G. For 100G is 4x25G.

SWDM4 can’t connect with SR Bidi to use, as channel and wavelength different. But this two bring same benefit for end customer, which enables reuse of existing 10 gigabit or 25G duplex MMF infrastructure for migration to 40 Gigabit or 100G Ethernet connectivity.

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100G QSFP28 Single Lambda Transceiver

Mar 01, 2022

Normal QSFP28 CWDM4, LR4 modules is NRZ (non-return to zero), which is two-level binary modulation format. QSFP28 Single Lambda Transceiver is use PAM4 (four-level pulse amplitude modulation). PAM4 contains twice the amount of data than NRZ which increase network bandwidth without adding additional fibers, effectively improve bandwidth utilization. So there won’t be any need for 4x25G-to-100G conversion because both the electrical interface and the optical signal will be single-lane 100G.

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100G QSFP28 ZR4 80km Optical Transceiver Modules

Mar 01, 2022

100G QSFP28 ZR4 is good product for this. Optinet QSFP28 ZR4 for 100 Gigabit Ethernet data links over a pair of single-mode optical fiber with 4 independent optical communication lanes, separated from each other using EML cooled ITU G.694.1 LAN WDM technology (1295.56, 1300.05, 1304.58, 1309.14nm) laser transmitter. On the receiver side and 4x25Gb/s SOA+PIN receivers. Each channel operating up to 25.78Gbps. Compliant with Multi Source Agreement (MSA) and IEEE 802.3ba 100GBASE-ZR4, support DDM real time diagnostics and FEC (Forward Error Correction) which will help receiving side detect and correct bit errors and improve the overall quality of the link. Popular applications such as telecom operator core networks and ISP Fiber to the Home backbone etc.

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2021 Spring Festival Time

Jan 07, 2021

Dear Partners, Thanks for your support over the past year. Our company Chinese new year holiday time has confirmed, from 6th Feb to 20th Feb. We wish you a happy holiday.

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CVR-QSFP-SFP10G Adaptor Module

Mar 11, 2021

CVR-QSFP-SFP10G 40G QSFP+ to 10G SFP+ adapter converter module provides a cost-effective and flexibility transition from 40 Gigabit Ethernet to 10G. It allows smooth migration to 40 Gigabit Ethernet by providing an option to use lower-speed Enhanced Small Form-Factor Pluggable (SFP+) modules in empty QSFP ports or when the other end of the network is running at lower speeds.

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