PM1550nm Polarization Maintaining Patch Cable FC APC Low Insertion Loss High Return Loss

PM1550nm Patch Cord Polarization Maintaining Fiber Optic Patch Cord FC APC Low Insertion Loss High Return Loss For Fiber Laser Amplifier And Optical Test

Product Overview

Product Overview: The PM1550nm Patch Cord is a polarization-maintaining fiber optic patch cord specifically designed for operation in the 1550nm band. It utilizes Corning PM1550 panda-type polarization-maintaining fiber, equipped with FC/APC connectors and a 0.9mm loose tube structure. The standard fiber length is 100±5cm. This product belongs to Gracyfiber's PMPC series, with keying uniformly aligned to the slow axis, controlling axial deviation within ±3° to maintain a stable polarization direction during transmission. The patch cord is designed with low insertion loss, high return loss, and high extinction ratio as key considerations. Typical insertion loss is ≤0.3dB, APC end-face return loss is ≥55dB, and extinction ratio at 23℃ is ≥23dB, making it suitable for long-term use in systems with stringent polarization and reflection performance requirements.

Product Applications: At the application level, the PM1550nm Patch Cord is primarily used in various polarization-maintaining fiber systems operating at 1550nm wavelength, such as fiber lasers, fiber amplifiers, precision test instruments, and optical experimental platforms. In fiber laser systems, it can serve as an intracavity or extracavity connector, reliably connecting isolators, couplers, polarization-related devices, and other modules in series to ensure consistent polarization direction throughout the link, facilitating more stable single-polarization output. In fiber amplifier or amplification stage testing, this patch cord can serve as a standard connection device for input/output and monitoring branches, helping engineers to perform gain and noise tests repeatedly and accurately. In test instrument and laboratory setups, it is often used as a "standard polarization-maintaining patch cord" for building experimental optical paths for interferometry, coherent detection, polarization analysis, etc., making experimental results more comparable and repeatable.

Product Features: From a performance perspective, this PM1550nm Patch Cord possesses several key features. First, it features low insertion loss, with a typical value of ≤0.3dB given in the specifications, which helps reduce the system link loss margin. Second, it boasts high return loss, with a return loss ≥50dB for UPC endface type and ≥55dB for APC endface type, effectively suppressing the impact of reflected light on the laser and amplifier. Third, it has high extinction ratio, with an ER ≥23dB at 23℃, significantly suppressing undesired polarization components and ensuring polarization preservation. The fiber type is PM1550 (Corning Panda), with the slow axis as the working axis and aligned with the connector key, structurally ensuring polarization direction consistency. The device operates in a temperature range of -5 to +70℃ and in a storage temperature range of -40 to +80℃, meeting the long-term stable operation requirements of common computer room and laboratory environments.

Product Applications: From a system integration perspective, the PM1550nm Patch Cord can be used for short-distance interconnects between modules within a complete system, as well as as external connection cables between cabinets or between equipment and benchtop instruments. In system design, engineers can deploy it at critical optical path locations, such as between the laser output port and the isolator, the isolator and the amplification stage, and the amplification stage and the measurement end, reducing the number of fusion splices and significantly simplifying on-site installation. On production lines or experimental platforms, these standardized PM patch cords allow for rapid setup, disassembly, and reconstruction of test optical paths, making batch testing, aging verification, and solution comparison more efficient. Furthermore, its use of FC/APC connectors and a 0.9mm loose tube structure makes it suitable for flexible wiring in confined spaces, while also providing mechanical protection and flexibility.

Product Advantages: Compared to ordinary single-mode 1550nm patch cords, the core advantages of the PM1550nm Patch Cord lie in its polarization maintenance capability and parameter controllability. Ordinary single-mode patch cords cannot guarantee the consistency of polarization direction during transmission, while this product, through panda-shaped polarization-maintaining fiber and strict axial alignment, can stably transmit polarization information in the link, significantly reducing the impact of random polarization drift on system power, phase, and measurement accuracy. Furthermore, the product provides clear indicators and verification standards for key parameters such as insertion loss, return loss, and extinction ratio, facilitating link budgeting and simulation by system designers. The ordering information clearly defines the wavelength, axial type, sheath size, fiber length, and connector types at both ends through coding, enabling customers to quickly select and configure in batches according to specific projects, reducing inventory management difficulties and on-site splicing rework rates.

Summary: Overall, the PM1550nm Patch Cord is a high-quality connectivity device designed for 1550nm polarization-maintaining fiber systems. It combines advantages such as low insertion loss, high return loss, high extinction ratio, strict axial alignment, and good environmental adaptability, making it suitable for various polarization-sensitive scenarios, including fiber lasers, optical amplification, precision testing, and experimental research. By properly configuring these polarization-maintaining patch cords in the system, users can not only improve the polarization stability and overall optical performance of the link but also simplify on-site installation and maintenance workflows, shortening development and debugging cycles. For equipment manufacturers and system integrators seeking high stability, consistency, and reliability, the PM1550nm Patch Cord is not just a fiber optic connector but a crucial foundational module for building high-quality polarization-maintaining solutions.