How Much Do You Know About 100G OTU4 QSFP28 LR4 AND 100G CFP4 LR4 10KM

There are many form factors of 100G transceivers including CXP, CFP, CFP2, CPAK, CFP4 and QSFP28. Among them, QSFP28 and CFP4 optical transceiver are the most commonly used 100G transceivers.But how much do you know about them ? Today ,let’s talk more about them .


The 100G QSFP28 LR4 transceiver is a fully integrated 4x25Gbit/s optical transceiver module, designed for use in data centers and high performance computing network links on up to 10km of single mode fiber (SMF). They are compliant with QSFP28 MSA, IEEE 802.3ba and IEEE 802.3bm CAUI-4. When connected to data transmission links, it converts four input channels of 25Gb/s electrical data to four channels of LAN WDM optical signals and then multiplexes them into a signal channel for 100Gb/s optical transmission. While on the receiver side, the module demultiplexes the 100G optical signals into four output channels and converts them into electrical data. And the 100G CFP4 LR4 optical transceiver is a full duplex, photonic-integrated optic transceiver that provides a high-speed link with an aggregated data rate of either 103.125 Gbps or 111.81 Gbps over up to 10 km of SMF28. They are compliant with the CFP MSA, IEEE 802.3ba 100GBASE-LR4 and IEEE 802.3bm CAUI-4.Digital diagnostics functions are available via the MDIO interface, as specified by the CFP MSA and Application Note AN-20xx. The optical transceiver is compliant per the RoHS Directive 2011/65/EU. The block diagrams are shown as follows:
CFP4 LR4 Transceiver Block Diagram

CFP4 LR4 Transceiver Block Diagram

QSFP28 LR4 block diagram

All the 100G QSFP28 and CFP4 optical module solutions are compatible with most of the OEM platforms like Cisco, HP, Juniper, Alcatel, Extreme, Arista, Brocade, Huawei ...etc. Both form factors have their advantages, depending on the application and required availability timeframe.Compared with 100G CFP4 LR4 10KM,though the CFP4 LR4 Supports modules up to 6W @2.5W/sq.in, the QSFP28 LR4 allows somewhat higher port density than CFP4 (~2mm cage pitch difference).What’s more ,it can share same port with 40G QSFP+ ,which is challenging for 100G CFP4 LR4. The disadvantage is that the QSFP28 LR4 Supports modules only up to 3.5W @2.6W/sq.in and the stacked port configuration is harder to cool. They are all used in Local area networks (LAN),Wide area networks (WAN),Ethernet switches and router applications and ITU-T OTU4 OTL4.4 applications.



As we know ,100G OTU4 QSFP28 LR4 transceivers offer the cost-optimized solutions for connecting 100G switches together in a rack or data center, which become very popular in the 100G connectivity.So It will be the main force in 100G marketing .Regard to 100G CFP4 LR4,it has superior OTU4 performance .

It is easy to understand that for 100G short direct cabling within 100m, 100GBASE-SR4 QSFP28 optical module and 100G QSFP28 to QSFP28 cables are good choice. And for 100G long direct cabling, for example 10km, both 100GBASE-LR4 QSFP28 optical module and 100GBASE-LR4 CFP4 transceiver can support up to 10km on single-mode LC patch cables. For longer 100G direct cabling above 10km, the 100GBASE-ER4 QSFP28 and 100GBASE-ER4 CFP4 are ideal choice as their transmission distances support up to 25 km and 40 km, respectively. As data center 100G optics market is accelerating ,and 100G transceivers are becoming more and more widely deployed in data center.There are various types of 100G transceivers on the market. Different companies and operators have different requirements for their links and applications. So choosing a suitable 100G QSFP28 or CFP4 LR4 transceiver should be based on your practical situations. If you want to know more about 100G QSFP28 and CFP4 series optical transceivers, welcome to visit Gigalight

Gigalight Pushed Out Low-Cost OTU4 100G Optical Transceiver to Remarch Toward DPI Market

News on August 31st,2017. It’s reported that Gigalight has pushed out new-style OTU4 100G optical transceiver, including 100G CFP2 LR4 10KM and 100G OTU4 QSFP28 LR4, before the coming of CIOE, which will be a very attractive choice for DPI clients.

100G CFP2 LR4 10KM

100G OTU4 QSFP28 LR4

Gigalight new-style OTU4 100G optical transceiver is available for four-channels full duplex communication, in which the transmission speed rate of each channel is 28Gbps, uses self-developed 100G ROSA, is accorded to CFP2 /QSFP28 MSA hardware standards, IEEE 802.3ba 100GBASE LR4 and OTU4 4I1-9D1F, and is with MDIO digital diagnostics and control functions. In addition, DML optical master with assembled LD chip and DML PIN acceptor with high flexibility are adopted, in which the power consumption of CFP2-LR4 is lower than 6W and the one of QSFP28 LR4 is lower than 3.5W, both of which have advantages of low power consumption, and available to transmit data of 100GbE and OTU4 in 10km single-mode optic fiber.

Transmitting Optic Eye Diagram

Compared with EML 100G optical module adopting EML optical master,DML optical receiver is mainly responsible to deal with problems about the low cost and low power consumption in the DPI market. The requirements for DML optical master are raised due to the rising of speed rate. Therefore, the transmission of OTU4 will be a very big challenge. However, Gigalight succeeds in breaking through the hard tech problems and solving the usage problems of DML at the speed of 28Gbps by combining the market trend and its own developed strength and via innovative tech development.
With the rapid development of Internet, cloud computing, data center and so on. Gigalight will push out more products with high-quality and new tech to meet the clients’ multiple needs. Let’s expect it.

Gigalight Will Demonstrate 200G QSFP DD SR8 During the 2017 CIOE and ECOC Exhibition

It’s recently reported that Gigalight has pushed out 200G QSFP DD SR8(2X 100GBASE-SR4) optical module officially and will have a demonstration on the spot during the CIOE2017 and ECOC2017 exhibition.

Gigalight 200G QSFP DD SR8 optical transceiver supports 8-channels 25Gb/s data channel, and its total bandwidth is suitable for 200GE Ethernet, conformed to QSFP-DD MSA. Besides, it has apparent advantages, such as the low power dissipation lower than 3.5W, outstanding design to solve problems about the accumulations of temperature, and has the digital diagnostic function. In the real testing environment, it is entirely accorded with the 100m OM4 fiber transmission applications without error code according to the strict error-code testing standard, lower than -152 . In addition, 200G QSFP DD SR8 optical transceiver is with high-quality optical eye diagram, high flexibility in accepting and high performance in electric eye jittering.



The testing data about TX optical eye diagram, RX electric eye diagram, power dissipation, and error code rate is as below:

Emitting Optic Eye Diagram（CH 1）

Outputing Electric Eye Diagram（CH 2）

Gigalight 200G QSFP DD SR8 adopts the self-designed lens, assembles two self-developed optical engines, and has duplex 25Gbps data channel with 8 channels under the same packaging size as QSFP+ . To some degree, QSFP DD optical transceiver with bandwidth twice as much as 100GE QSFP28 SR4’s, and with doubled-density, can vastly meet the needs for the rapid increasing of data center flow. The reason why the new transceiver is called “double density” is related to the current 100G QSFP28 transceivers. The “double density” means the doubling of the number of high-speed electrical interfaces that the module supports compare to regular QSFP28 module.

200G QSFP DD SR8 Internal Sketch

Besides offering higher capacity of bandwidth density and higher bandwidth density, QSFP-DD optical transceiver is also forward/backward compatible with QSFP, QSFP28 optical transceiver, AOC/DAC and so on.，allowing them to support existing QSFP modules and provide flexibility for end users and system designer. This means the data center could save a considerable sum of money in the future upgrading.

Seen from the present market needs, demands for data center products are prosperous, which requires to update products continuously and reduce the products’ costs. At present, Gigalight pushes out brand new 200G QSFP DD SR8 optical transceiver right to solve cost problem for clients depending on their own strength.

Meanwhile, Gigalight also provides 200G QSFP DD AOC and 200G QSFP DD to 2x 100G QSFP28 Breakout AOC. If you want to know more details about 200G QSFP DD products, welcome to visit our exhibition stand for consulting!
2017 CIOE Address： ShenZhen Ritz-Carlton Hotel (NO.116 Fuhua 3rd road,Futian district ,Shenzhen)

2017 ECOC Exhibition Stand NO：481
See You in Sweden！