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In the context of the rapid development of data centers and telecommunication networks, optical transceivers are gradually becoming the focus of the market as key components. To meet different application needs, optical transceivers have diversified in packaging technology. The type of packaging is one of the essential factors affecting the performance and application of optical transceivers.
CFP8 (Centum Form-factor Pluggable 8) is an extended version of CFP4, with the number of channels increased to 8 channels, and the size correspondingly enlarged. The CFP8 package type had certain applications in the early stages of optical transceivers, but its power consumption and size are relatively large, and the cost is relatively high, making it less advantageous in application scenarios such as data centers. With technological advancements, the CFP8 package has gradually been replaced by more advanced packaging forms.
QSFP-DD (Quad Small Form-factor Pluggable Double Density) is a dual-density quad-channel small form-factor pluggable package, defined by the QSFP-DD MSA group as a high-speed pluggable module package. As the preferred packaging for optical transceivers, QSFP-DD enables data centers to effectively grow and expand cloud capacity as needed. Its features include:
QSFP-DD package adopts an 8-channel electrical interface, with a rate of up to 50Gb/s per channel (using PAM4 modulation), providing aggregated bandwidth of up to 400Gb/s.
QSFP-DD's bandwidth can be up to ten times that of QSFP+ or four times that of QSFP28, with the same port density as QSFP+/QSFP28.
QSFP-DD can be backward compatible with QSFP+/QSFP28, making it easy to upgrade and expand existing equipment.
QSFP-DD has a smaller size and higher density, making it more suitable for short-distance data center use.
OSFP (Octal Small Form-factor Pluggable) is a new packaging type for high-speed data transfer standards in optical transceivers. In the telecommunication network, the OSFP package technology is favored for its high reliability and long-distance transmission capabilities. Its features include: High Speed: OSFP supports 8 high-speed electrical channels with high transmission speed.
Compared to other packaging types, OSFP has lower power consumption.
OSFP has an integrated heat sink, significantly improving heat dissipation performance.
OSFP is much smaller in size than CFP8 but slightly larger than QSFP-DD, making it suitable for a variety of application scenarios.
QSFP112 is a packaging type defined by the MSA organization. The "112" in its name represents each channel's transmission rate of 112Gbps, achieving a total of four channels with bps transmission. It is suitable for applications with extremely high bandwidth requirements, such as financial services, scientific research, and large-scale computing. Its features include:
QSFP112 offers signal integrity and high density, providing a simple upgrade path for existing solutions.
QSFP112 can be backward compatible with the QSFP series (such as QSFP 40G, 100G, 200G, etc.), making network upgrades easier.
Optical transceivers come with various packaging types, each with its unique features to meet different network environments and application needs. When choosing an optical transceiver, one should comprehensively consider the pros and cons of various packaging technologies based on specific application requirements, environmental conditions, and cost budgets to select the most suitable packaging type. With continuous technological advancements and increased data flow, more innovative packaging technologies may emerge in the future to meet higher demands for high-speed network transmission.
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