Active optical fiber, AOC is the abbreviation of active optical fiber, mainly used in short distance multi-channel data communication applications. The active optical cable is composed of multimode fiber, optical transceiver, control chip and parallel optical module. The optical transceivers at both ends of the active optical cable provide photoelectric conversion and optical transmission functions to improve the transmission speed and transmission distance of the optical cable without weakening the compatibility with the standard electrical interface. （AOC= Transceiver+ Jumper）
The overall cost of AOC active optical cable is relatively low, because the optical fiber is fixed in the module, and some optical devices are less used in the manufacturing process. AOC active optical cable is suitable for short-distance application scenarios, but not suitable for long-distance transmission scenarios. AOC active optical cable is widely used in IDC data center. Compared with the interconnection system composed of independent devices (optical transceiver module, optical fiber jumper), it has higher speed and reliability, which makes the cost of the system lower and the maintenance easier.
AOC has low environmental requirements, no cleaning problem of optical fiber connector; cost optimization, no DDM function; but it can not flexibly configure the distance, so the transmission distance needs to be confirmed in advance before delivery.
Features
MPO or MTP fiber connector, optional core number
To be assembled, it can be directly assembled with optical module components
RoHS compliant
Application
40gb/s /100gb/s qsfp /qsfp+ optical module
Fibre Channel Applications
InfiniBand QDR, SDR, DDR
Servers, switches, storage and host card adapters，etc.
Technical parameter
Plug type | MPO or MTP optional |
Number of cores | multi core, such as 8, 1, 24, etc. |
Fiber type | 50 / 125, OM3 |
Grinding type | PC or APC8 ° |
Insertion loss | mm ≤ 0.5dB, SM ≤ 0.7db |
Working temperature | 0 ℃～ + 70 ℃ |
Absolute Maximum Ratings
Parameter | Symbol | Min. | Typical | Max. | Unit |
Storage Temperature | Ts | -10 | - | +85 | °C |
Operating Humidity | RH | +5 | - | +85 | % |
Supply Voltage | Vcc | -0.5 | +3.3 | +3.6 | V |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typical | Max. | Unit |
Operating Case Temperature | TC | 0 | - | +70 | °C |
Supply Voltage | VCC | +3.14 | +3.3 | +3.47 | V |
Supply current (QSFP+) | ICC | - | - | 450 | mA |
Supply current (SFP+)(per terminal) | - | - | 150 | mA | |
Channel Data Rate | Dr | 10.3125 | - | Gbps | |
Fiber bend radius | - | 3 | - | - | CM |
Advantages of AOC:
Low power consumption; small size; light weight; good heat dissipation performance; long transmission distance; pollution-free connection port; good stability.
QSFP + Pin Descriptions
Mechanical Design Diagram
Active optical cable can be divided into three functional parts: optical emission part, optical receiving part and control circuit.
The optical emission part includes: vscel laser, monitoring diode, drive and control circuit.
Optical emission is to transform digital electrical signal into optical signal and transmit it through optical fiber. It mainly includes signal modulation, static working point adjustment and automatic power control, etc. it has the function of transmitting prohibition and monitoring output.
The optical receiving part consists of photodiode (PIN), transimpedance amplifier (TIA) and auxiliary circuit.
Optical receiving is to convert the weak optical signal in the optical fiber into electrical signal, and the transimpedance amplifier (TIA) outputs the limiting electrical signal, and has the function of no light alarm.
The whole data center field has begun to import 40g AOC globally. Compared with 40g DAC copper cable, 40g AOC has incomparable advantages in data transmission environment above 7m, including smaller size, lighter weight, easier bending, easier management, longer signal transmission distance, etc. The following is the full duplex AOC component structure:
AOC transmission principle
Taking qsfp + AOC as an example, the two ends of the cable (a end and B end) are qsfp optical module devices. At the a end, the data input DIN is the electrical signal. The electrical signal is converted into the optical signal of a specific wavelength through the E-O converter, and the optical signal is input into the optical cable after modulation and coupling; after the optical signal reaches the B end through the optical cable, the photoelectric detection device (O-E The optical signal is detected and amplified by converter, and the corresponding electrical signal is output by dout. B end and a end transmit symmetrically.
Parallel optical interconnection is realized by parallel optical module and ribbon optical cable. The parallel optical module is based on VCSEL array and pin array. The wavelength is 850nm. It is suitable for multimode fiber of 50 / 125um and 62.5 / 125um. In terms of packaging, the electrical interface adopts the standard MEG array connector, and the optical interface uses the standard MTP / MPO ribbon optical cable. At present, there are 4-channel transceiver integrated module and 12 channel transceiver separation module.
Application of AOC:
a. AOC is applied to the switch, and the conversion from 40g qsfp + AOC to 4 * 10g SFP + AOC can connect two 40g switches, and it can also connect 10g switches with 10G network card
b. AOC is applied in the computer room. Between 5 and 30 meters, AOC can be used to connect the switch and the rack of the data center; if it is less than 5 meters, the best choice is DAC; if it is more than 30 meters, if over 30 meters, it is better to select optical module and jumper connection.
HTF's AOC products have a complete range, long warranty time and reasonable price.
If you need anything, you can contact HTF Zoey.
contact：support@htfuture.com
Skype：sales5_ 1909，WeChat：16635025029
