The OSFP (Octal Small Form-factor Pluggable) is a new type of 400G optical module packaging standard for high-speed data transmission. It features 8 high-speed electrical channels and an integrated heat sink, significantly improving thermal performance, providing higher transmission speeds, lower power consumption, and a smaller size. This makes it suitable for telecom markets, data center networks, and high-performance computing applications.
Types of 400G OSFP Optical Modules
Currently, the types of 400G OSFP optical modules available in the market include 400G OSFP SR8, 400G OSFP DR4, 400G OSFP DR4+, 400G OSFP FR4, 400G OSFP 2*FR4, and 400G OSFP LR4.
| Product Description | Data Sheet | Data Rate(Gbit/s) | TX | RX | TX_Min (dBm) | TX_Max (dBm) | RX_Min (dBm) | RX_Max (dBm) | Power Consumption (W) | Reach | Temperature (deg C) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| OSFP SR8 | 400G | 850nm VCSEL | PIN | -6 | 4 | -7.9 | 4 | 12 | 100m | 0~70 | |
| OSFP 2x FR4 | 400G | EML CWDM | PIN | -4.2 | 4.7 | -8.2 | 4.7 | 12 | 2km | 20~60 | |
| OSFP DR4 | 400G | 1310nm EML | PIN | -2.9 | 4 | -5.9 | 4 | 12 | 500m | 0~70 | |
| OSFP DR4+ | 400G | 1310nm EML | PIN | -2.4 | 4 | -6.4 | 4.5 | 12 | 2km | 0~70 | |
| OSFP FR4 | 400G | EML CWDM4 | PIN | -3.3 | 3.5 | -7.3 | 3.5 | 12 | 2km | 0~70 | |
| OSFP LR4 | 400G | EML CWDM4 | PIN | -1.4 | 4.5 | -7.7 | 4.5 | 12 | 10km | 0~70 | |
| OSFP AOC | 400G | 850nm VCSEL | PIN | N/A | N/A | N/A | N/A | 12.0 (each OSFP) | 3~100m | 0~70 |
400G OSFP SR8 Optical Module
The 400G OSFP SR8 optical module is paired with multimode optical fiber and supports transmission distances of up to 100 meters. Therefore, it is more suitable for short-distance switch interconnections or multi-channel data transmission. Examples include:
- Interconnecting two 400G OSFP SR8 optical modules using a 16-fiber MTP optical cable.
- Connecting a 400G OSFP SR8 optical module to two 200G SR4 optical modules using a 16-fiber MTP to 2*8-fiber MPO branch optical cable for multi-channel data transmission.
- Connecting a 400G OSFP optical module to eight 50G SFP optical modules using a 16-fiber MTP to 8*LC duplex branch optical cable.
400G OSFP DR4 Optical Module
The 400G OSFP DR4 optical module employs 100G PAM4 modulation and has a maximum transmission distance of 500 meters. It is suitable for 150 to 500 meters 400G-100G network connections. The 400G OSFP DR4 optical module can be connected to four 100G DR4 optical modules on the other end using a 12-fiber MTP to 4*LC duplex branch optical cable.
400G OSFP DR4+ Optical Module
The 400G OSFP DR4+ optical module is essentially an upgraded version of the 400G OSFP DR4 optical module with a longer transmission distance of up to 2 kilometers. It is more suitable for 400G-100G network connections within 2 kilometers. The 400G OSFP DR4+ optical module can be connected to four 100G DR4 optical modules on the other end using a 12-fiber MTP to 4*LC duplex branch optical cable to meet 2-kilometer transmission requirements.
400G OSFP FR4 Optical Module
The 400G OSFP FR4 optical module uses four CWDM wavelengths with non-cooled EML lasers, making it suitable for 400G interconnects. The 400G OSFP FR4 optical module can be connected using LC duplex optical cables.
400G OSFP FR8 Optical Module
Unlike the 400G OSFP FR4 optical module, the 400G OSFP FR8 optical module is a 2200G optical module that uses 50G PAM4 modulation technology and has eight built-in circuit channels. It is more suitable for multi-channel data communication. Typically, the 400G OSFP FR8 optical module can be connected to the opposite end’s 200G FR4 optical module using a 2CS to 2*LC duplex branch optical cable.
Frequently Asked Questions
Q: Can OSFP optical modules be inserted into QSFP-DD ports?
A: No, because QSFP and QSFP-DD have different sizes and are not compatible. Therefore, if your network equipment uses OSFP packaging, you must choose OSFP optical modules, OSFP DACs, or OSFP AOCs.
Q: Can 100G QSFP28 optical modules be inserted into OSFP ports?
A: 100G QSFP28 optical modules cannot be directly inserted into OSFP ports, but a conversion module can be used to insert a 100G QSFP28 optical module into an OSFP port. In this case, the link’s transmission rate would be 100G.
Q: Besides OSFP optical modules, what other 400G products are available?
A: Currently, there are also 400G OSFP DACs and AOCs available.
