Currently, 100G optical modules has become the market mainstream, but the requirements for bandwidth, port density, and system energy consumption is still rising, which also further promote the technology to 200G, 400G or more high-speed system forward. 200G / 400G mainstream next-generation data center, 400G Ethernet standards before completion of the 200G Ethernet standard. Subsequently easily introduce daylight 200G optical communication module.
200G QSFP-DD SR8 optical module:
200G QSFP-DD SR8 optical module is a high-performance optical module for short-range multi-lane data communication and interconnect applications. It 8x25.78125Gbps bandwidth incorporates eight data channels in each direction. Each channel runs at 25.78Gbps of 70m or OM4 fiber transmission when used with the OM3 fiber transmission when used with 100m. These modules are 850nm wavelength multimode fiber system.
200G QSFP-DD SR8 optical module features:
★ 8 channel full-duplex transceiver module
★ data transmission rates up to 26Gbps each
★ 8 channel 850nm VCSEL array
★ 8 channel PIN photodetector array
★ receiving end and the transmitting channel within the CDR circuit
★ support CDR bypass
★ Low power consumption <4W
Hot Swap QSFP DD form factor ★
★ OM3 multimode fiber (MMF) link the maximum length of 70m, OM4 MMF is 100m
★ mpo24 connector socket
★ Built-in digital diagnostic functions
★ Operating temperature 0 ° C + 70 ° C in the case
★ 3.3 v supply voltage
★ rohs 6-compliant (lead-free)
200G QSFP-DD PSM8 optical module:
200G QSFP-DD PSM8 optical module product of the single-mode high-rate parallel art. Satisfies QSFP-DD MSA standard, the transmission distance of up to 10KM, a parallel 8, 25Gbps single design.
200G QSFP-DD PSM8 optical module features:
★ The hot-pluggable package QSFP-DD
★ 8-channel full-duplex transceiver module
★ 8-channel 1310nm DFB laser array and the photodetector array PIN
★ receive and transmit channels Built CDR circuit
★ support CDR bypass
★ meet the QSFP-DD MSA and 100G PSM4 MSA standards
★ compatible with InfiniBand DDR / EDR standard
★ maximum rate of up to 206.25Gbps (8-way 25G NRZ)
★ by G.652 single-mode fiber (SMF) transmission distance of up to 10 km
★ maximum power consumption of less than 6.5W
★ MPO24 light opening
★ operating temperature range from 0 to 70 degrees Celsius
★ 3.3V supply
★ comply with RoHS environmental standards (unleaded)
Similarities of these two products are all in the data center solutions 200G optical module, and have adopted QSFP-DD package, the core 16 can be used MTP / MPO.
200G QSFP-DD advantages:
QSFP-DD advantage is that the density can be done 1U panel 36 * 200G / 400G, and the pair of front and rear QSFP to backward compatibility, a conventional compatible optical module QSFP28 and AOC / DAC high-speed cable or the like.
The main difference is that 200G QSFP-DD PSM8 8 uses a parallel scheme 1310nm single mode optical fiber, transmission distance up to 10km; and 200G QSFP-DD SR8 multimode fiber parallel programs on optical fiber link transmission distance OM4 up to 100m.
Small Form Factor Pluggable SFP-DD automatic double-density optical module package, more than double the bandwidth SFP56 SFP28 or (25G / 50G), supporting higher rate (50G / 100G) while also maintaining backwards compatibility SFP28 or SFP56. QSFP-DD Quad double density packaging SFP optical module, defined by QSFP-DD MSA group, or QSFP56 QSFP28 density than doubled, eight channels, each with a rate of up to 25G or 50G, 200G or support so 400G optical transmission.
SFP-DD, QSFP28 comparison with QSFP-DD Package:
Another optical interconnect data center market trend is predictable phase-out low-rate optical network module and the data center core, the main transition is from 10G to 40G and 100G and higher 200G. 100G new development of optical devices for 200G / 400G optical devices paved the way. Skylight easily understood communication as a professional manufacturer of optical modules, but also continue to develop high-rate products. In general, the optical module is to a higher market rates, lower power consumption and smaller size or shape development.
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