High-speed transceiver parallel optics MT subassembly

 With the growth of global data volume, parallel optical technology is an important technical for the expansion of current data centers, and the optical transmission rate has continuously evolved from 10Gbps, 40Gbps, 100Gbps to 200Gbps, 400Gbps, and even 600Gbps, 800Gbps. At this year's OFC conference, a number of Chinese suppliers have successively demonstrated 800G rate optical modules, which means that 800G will enter a new era.

What is parallel optics? Parallel optical technology is a special optical communication technology that transmits and receives signals at both ends of the link. Parallel optical transceiver modules are usually used to achieve high-speed signal transmission at both ends. Parallel optical technology is a cost-effective solution for 4×50G, 8×50Gbps transmission.

In parallel optical signal transmission, the parallel optical modules at both ends of the link contain multiple transmitters and receivers. Multiple optical fibers are used to transmit and receive signals. The data rate of multiple-channels parallel transmission can support 40G to 100G per second. As shown in the figure, 8-bit data is simultaneously transmitted through parallel lines, so that the data transmission speed is greatly improved. Multimode parallel technology is mostly used for short-distance transmission of 100G and below.

 

Parallel optical modules rely more on high integration and small packaging to generate less heat than multiple discrete devices. MT (MPO) ferrules and optical subassemblies are one of the key components supporting parallel optical interconnects, which are used to connect internal optical lenses and external optical interfaces, and can be integrated into optical module boards. The small size and multi-channel of the MT ferrule makes it easy to use as an external optical interface in the parallel transmission.

Relying on high-density parallel optics design and manufacturing capabilities, as well as high-precision mold manufacturing and measurement technology capabilities, HYC now has the mass production capacity of high-speed transceiver optical subassemblies.

MT-Jumper

The ferrules of MT-jumper are available in 0° and 8° polishing angles. The length tolerance can be customized, and the minimum can meet ±0.15mm.

 

MT-2×Mini MT

Due to the compact internal structure of some optical modules, the traditional MT ferrule is bulky and may not be able to be inserted into the transceiver. Mini MT ferrules are the right devices to use in this small space connection, which are half the size of traditional MT ferrules.

 

MT-FA

MT-FA is a short fiber jumper composed of MT and fiber array. The end face angle of FA can be customized and it requires high precision. It is widely used in 100G PSM4 to connect to the external port.

 

About HYC Co., Ltd

With 22 years manufacturing experience of passive optical devices, HYC has three technical capabilities, passive optical devices chip packaging and coupling technology, precise mould/injection molding design and manufacture technology, and fiber array design and manufacture technology. HYC can provide one-stop customized services for passive devices design, R&D, manufacturing, with optical fiber connectors, patch cords, plc splitter, wdm, high-speed transceiver optical subassembly and mems optical switch production lines.

How to Choose High Quality Fiber Optic Adapter?

Optical fiber adapter is the connecting parts in the middle of optical fiber connectors. The fiber optic adapter can precisely connect the two end faces of the fiber so that the optical energy output from the transmitting fiber can be coupled to the receiving fiber. It is designed to join and align the connectors of two fiber optic patch cables.

With the widespread use of fiber optic adapters in fiber optic connections, there are a variety of optical fiber adapter to choose, to adapt to different environment installation requirements.  Common types of adapters are: LC adapter, FC adapter, SC adapter, ST adapter, E2000 adapter, MTP / MPO adapter.

With a number of different adapters available, how to pick the high quality fiber optic adapter may become a problem. In general, the following points should be considered when considering fiber optic adapters.

Flame retardant level of the adapter

UL 94, the Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing, is a plastics flammability standard released by Underwriters Laboratories of the United States. The standard determines the material’s tendency to either extinguish or spread the flame once the specimen has been ignited.

HB,V0, V1 and V2 are different flame retardant grades. Different grades has different fire resistance test methods and different test criteria. Flame retardant grades are gradually increased from HB, V-2 and V-1 to V-0. There is less optical fiber adapters on the market that can reach the UL94-V0 level. HYC’s LC Dual/Quad adapters complies with the UL94-V0 standard.

Insertion loss

Usually, insertion loss is required to be less than 0.2dB. If the insertion loss is too high, it will affect the transmission of light.

Repeatability

The adapter needs to be plugged and unplugged frequently, so the durability of the adapter is important. The normal standard needs to ensure that the number of plugging and unplugging can reach more than 500 times without affecting the insertion loss.

Operating temperature

-40℃ ~ 75℃ is a normal working range of the adapter. The operating temperature of this HYC LC adapter is -40℃~85℃.

Materials for adapter alignment sleeve

The alignment sleeve is the most important component of the fiber adapter, which is generally made of metal or ceramic.The fiber adapter made of ceramic will have a relatively good effect. Because the crystal structure of ceramic is hard and not easy to be deformed, it can achieve fast alignment and high-precision optical fiber end face connection.

Generally speaking, the above five points should be taken into account, when considering a fiber optic adapter. There are still some other factors affecting the quality, such as tensile strength and compliance standards,etc. Fiber optic adapters are widely used in communication equipment rooms, FTTH fiber-to-the-home, local area networks, fiber-optic communication systems, fiber-optic connection transmission equipment,defense operations equipment, and so on. Although the fiber optic adapters are small, its quality directly affects the entire fiber link. It should be rigorous and comprehensive while choosing the fiber optic adapters.

Article from HYC Blog