- Brian
- September 21, 2023
- 3:17 am
Harper Ross
Answered on 3:17 am
APC and PC/UPC are two types of polish styles for the ferrules inside the optical connectors. The ferrule is the housing for the exposed end of a fiber, designed to be connected to another fiber, or into a transmitter or receiver. The polish style affects the quality of the signal transmission and the return loss of the connector.
APC stands for Angled Physical Contact. It means that the ferrule endface is polished at an 8° angle, which causes the reflected light to reflect at an angle into the cladding instead of straight back toward the source. This reduces the return loss and improves the performance of the connector. APC connectors are usually green in color.
PC stands for Physical Contact. It means that the ferrule endface is polished with no angle but with a slight curvature for better core alignment. UPC stands for Ultra Physical Contact. It is an improvement of the PC polish with a finer surface finish and a lower return loss. PC and UPC connectors are usually blue in color.
Different applications may require different polish styles depending on the sensitivity to return loss and the wavelength range of the signal. Generally, APC connectors are preferred for single-mode fibers, especially for higher wavelengths (above 1500 nm) and longer distances. PC and UPC connectors are more common for multimode fibers and shorter distances.
Some examples of optical connectors that use APC polish are LC/APC, SC/APC, FC/APC, E2000/APC, etc. Some examples of optical connectors that use PC or UPC polish are LC/PC, SC/PC, FC/PC, ST/PC, MTRJ/PC, etc.
People Also Ask
Understanding the Power of NVIDIA’s BlueField-3 DPU
Introduction When working with NVIDIA’s H100 SXM servers, you may often see a configuration that includes two BFD-3 units. This raises questions, especially since the system already comes with eight CX-7 400G network cards. What are the fundamental differences and roles of BFD-3 compared to CX-7? Moreover, why does BFD
Joint Testing of 400GbE Optical Transmission System by FiberMall
FiberMall, in collaboration with Lumentum-Neophotonics, Cisco-Acacia, and EXFO, has successfully proposed a 927-kilometer end-to-end interoperable 400-GbE (Gigabit Ethernet) optical transmission system. This system integrates the latest 400G pluggable optical modules, addressing the needs of Ethernet clients (IEEE 802.3 400GBASE), data center interconnects (OIF 400-ZR), and metro/regional (400G OpenROADM) networks. The
Mellanox MMA1T00-HS: The Ultimate Guide to a 200G QSFP56 Optical Transceiver
As the technology for data centers has changed, so has the demand for greater bandwidth and transmission of data. The Mellanox MMA1T00-HS, which is a 200G QSFP56 optical transceiver, is a breakthrough in the field of connectivity as it offers a powerful solution for new-age network systems. This is a
Unlocking the Potential of the QSFP28 SR4 Optical Transceiver Module
The QSFP28 SR4 Optical Optical Transceiver Module addresses the issues surrounding high-speed data communication system designs, especially for modern data centers and high-performance computing environments. However, increased data requirements lead to solutions that are efficient, inexpensive, and reliable, with the more relevant being the ability to provide connections of up
How Does Combo PON Integrate GPON and XGSPON?
As fiber-to-the-home (FTTH) network technology rapidly advances, GPON (Gigabit Passive Optical Network) has become the standard choice for most operators worldwide. However, with increasing demands for higher bandwidth, symmetrical rates, and lower latency, XGSPON (10G Symmetric Passive Optical Network) is gaining attention as the next-generation fiber access technology. In this
Mastering the 400gbase-dr4 Transceiver: A Comprehensive Guide to Optical Excellence
The evolution of optical transceiver technology has been a major factor in fulfilling the increasing demand for data transfer rates and capacity in contemporary networks. 400GBASE-DR4 transceiver is one of the latest examples of such a technology, which is developed specifically to allow faster data communication via single-mode fiber optic
Related Articles
800G SR8 and 400G SR4 Optical Transceiver Modules Compatibility and Interconnection Test Report
Version Change Log Writer V0 Sample Test Cassie Test Purpose Test Objects：800G OSFP SR8/400G OSFP SR4/400G Q112 SR4. By conducting corresponding tests, the test parameters meet the relevant industry standards, and the test modules can be normally used for Nvidia (Mellanox) MQM9790 switch, Nvidia (Mellanox) ConnectX-7 network card and Nvidia (Mellanox) BlueField-3, laying a foundation for
Understanding the Power of NVIDIA’s BlueField-3 DPU
Introduction When working with NVIDIA’s H100 SXM servers, you may often see a configuration that includes two BFD-3 units. This raises questions, especially since the system already comes with eight CX-7 400G network cards. What are the fundamental differences and roles of BFD-3 compared to CX-7? Moreover, why does BFD
Joint Testing of 400GbE Optical Transmission System by FiberMall
FiberMall, in collaboration with Lumentum-Neophotonics, Cisco-Acacia, and EXFO, has successfully proposed a 927-kilometer end-to-end interoperable 400-GbE (Gigabit Ethernet) optical transmission system. This system integrates the latest 400G pluggable optical modules, addressing the needs of Ethernet clients (IEEE 802.3 400GBASE), data center interconnects (OIF 400-ZR), and metro/regional (400G OpenROADM) networks. The
Mellanox MMA1T00-HS: The Ultimate Guide to a 200G QSFP56 Optical Transceiver
As the technology for data centers has changed, so has the demand for greater bandwidth and transmission of data. The Mellanox MMA1T00-HS, which is a 200G QSFP56 optical transceiver, is a breakthrough in the field of connectivity as it offers a powerful solution for new-age network systems. This is a
Unlocking the Potential of the QSFP28 SR4 Optical Transceiver Module
The QSFP28 SR4 Optical Optical Transceiver Module addresses the issues surrounding high-speed data communication system designs, especially for modern data centers and high-performance computing environments. However, increased data requirements lead to solutions that are efficient, inexpensive, and reliable, with the more relevant being the ability to provide connections of up
How Does Combo PON Integrate GPON and XGSPON?
As fiber-to-the-home (FTTH) network technology rapidly advances, GPON (Gigabit Passive Optical Network) has become the standard choice for most operators worldwide. However, with increasing demands for higher bandwidth, symmetrical rates, and lower latency, XGSPON (10G Symmetric Passive Optical Network) is gaining attention as the next-generation fiber access technology. In this
Mastering the 400gbase-dr4 Transceiver: A Comprehensive Guide to Optical Excellence
The evolution of optical transceiver technology has been a major factor in fulfilling the increasing demand for data transfer rates and capacity in contemporary networks. 400GBASE-DR4 transceiver is one of the latest examples of such a technology, which is developed specifically to allow faster data communication via single-mode fiber optic