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The photoelectric composite connector is a device that integrates optical signal transmission and power supply functions. Its technology, structure, and applications can be described in detail as follows:

1. Technical Characteristics

1. High transmission efficiency and low loss

◦ The design of sealed optical fiber installation holes and electrode insertion holes effectively reduces the number of optical reflective surfaces and lowers reflection loss (such as the structure in Shanghai Yiwu Optoelectronics' patent).

◦ Some solutions achieve synchronous transmission of optical and electrical signals through the precise cooperation of metal contacts and optical fiber cores, such as the contact fixing seat and gold fingers in the DLC photoelectric composite device.

2. Quick connection and disconnection technology

◦ The "water-tight self-separation photoelectric composite connector" from Wuxi Boen supports manual quick assembly and electric automatic disconnection, suitable for underwater or high-humidity environments, significantly reducing operational complexity.

◦ The Huawei cold-joint technology uses pressing-type slots and contact piercing designs to achieve quick wiring and stable contact.

3. Miniaturization and modular design

◦ The photoelectric hybrid cable jumper from Changfei Optoelectronics adopts the same size as the ordinary SC adapter, achieving compatibility and interchangeability, while reducing costs.

◦ Some solutions combine the optical unit with the cable around the central reinforcing core, protecting the optical unit with a stainless steel spiral armored tube, achieving compactness and pressure resistance.

II. Structural Composition

1. Core Components

◦ Fiber Section: Usually uses zirconium ceramic cores (such as SC/MU connectors), and the fiber end faces are polished to reduce losses.

◦ Electrical Section: Includes copper conductors or metal contacts, used for power supply or signal transmission. In some designs, positive and negative poles need to be strictly distinguished.

◦ Protective Structure: The outer sheath is made of water-resistant materials (such as stainless steel armor tubes or water-resistant cable grease), with the optical unit placed in the center to enhance compressive resistance.

2. Typical Structural Examples

◦ Circular Composite Cable: The center of the cable core is a FRP reinforced core, and the optical unit is twisted around the cable. The outer layer is covered with a sheath (such as the composite cable designed by China Mobile).

◦ DLC Device: Includes an inner frame, fiber core, contact seat, and outer frame. It is modularly assembled and disassembled through snap-fit components.

◦ Water-Proof Connector: The male and female components are separated automatically under water-proof conditions through a spring device and driving structure.

III. Application Scenarios

1. 5G Communication and Base Station Construction

◦ Used for connecting RRU/AAU equipment, splitting multiple signals through YGI-DLC transfer cables, and providing power to the equipment (such as the 5G solution of Hengtong Optics).

◦ Solves the problem of remote power supply for base stations, reducing the need for independent power line laying.

2. All-Optical Network and Smart Terminals

◦ In the FTTR (Fiber To The Room) solution, full-house gigabit coverage is achieved through optical-electrical hybrid cable patch cords, with only one cable required between the master and slave ONTs.

◦ In security monitoring, POE technology is combined, and the camera is powered and data is transmitted through the composite cable in the industrial environment.

3. Special Environmental Applications

◦ Marine exploration and underwater equipment: Waterproof self-separating connectors are suitable for high-humidity or underwater environments.

◦ Industrial scenarios: High-temperature-resistant silicone rubber sheathed cables and anti-bending design are suitable for complex wiring environments.

4. Medical and Public Facilities

◦ In the deployment of all-optical networks in hospitals, efficient connections between OLT and ONU are achieved through optical-electrical composite cables to meet the dual requirements of data and power supply.

IV. Summary of Technical Advantages

The photoelectric composite connector overcomes the cost and complexity issues of separating power and signal cabling in traditional solutions through an integrated design. Its miniaturization, low loss, and environmental adaptability make it a key component for 5G, all-optical networks, and industrial Internet of Things. In the future, with advancements in material technologies (such as laser microstructure welding) and automated connection technologies, its application scope will further expand.