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High Precision Polarization Maintaining Fiber Array - China Factory Suppliers for Fiber Laser and Sensor Applications
Product Introduction
In high-speed optical transceivers of 100G and above, especially coherent optical transceivers and silicon photonics transceivers, PM FAU (Polarization-Maintaining Fiber Array Unit) serves as the "key hub" for ensuring the stable transmission of polarized optical signals. Different from ordinary FAUs that only realize high-density coupling of optical signals, PM FAU uses special polarization axis alignment technology to accurately arrange polarization-maintaining fibers in fixed polarization directions (e.g., 0°/90°). While enabling parallel transmission of multi-channel optical signals, it effectively avoids polarization state crosstalk, providing core support for the signal integrity of high-speed optical modules.
Core Technical Advantages
- High-Precision Polarization Alignment: Through precision mechanical processing and optical calibration, the polarization axis alignment error can be controlled within ±1°, ensuring the polarization state of polarized optical signals remains stable during transmission. The minimum single-mode polarization-maintaining insertion loss is only 0.5dB, and the return loss exceeds 55dB.
- High-Density Integration: It supports multi-channel designs such as 8CH and 16CH, and the channel spacing can be customized according to module requirements (e.g., 250μm, 500μm), adapting to the packaging of miniaturized optical transceivers.
- High Environmental Adaptability: Adopting ceramic V-groove and metal shell packaging, it can withstand a wide temperature working environment from -40℃ to 85℃, with excellent anti-vibration and anti-shock performance, meeting the long-term stable operation needs of complex scenarios such as data centers and 5G base stations.
The PM FAU utilizes birefringence and an asymmetric structure to achieve an extinction ratio of ≥20 dB and a polarization axis deviation within ±3°, complying with the Telcordia GR-1221-CORE reliability standard.
Frequently Asked Questions
What is a PM FAU and how does it function in optical transceivers?
A PM FAU (Polarization-Maintaining Fiber Array Unit) acts as a critical hub in high-speed optical transceivers (100G and above). It uses precision polarization axis alignment technology to arrange fibers in fixed polarization directions, enabling parallel multi-channel transmission while preventing polarization state crosstalk.
What are the main technical parameters of the PM FAU?
The PM FAU features an extinction ratio of ≥20 dB, polarization axis deviation within ±3° (with axis alignment option of +/-2Deg), single-mode polarization-maintaining insertion loss of only 0.5dB, and a return loss exceeding 55dB.
What channel configurations and spacings are supported?
It supports high-density multi-channel integrations, including 8CH and 16CH configurations. The channel spacing can be customized to requirements such as 250μm or 500μm to fit miniaturized optical transceiver packaging.
How does the PM FAU perform under extreme environmental conditions?
Constructed with a ceramic V-groove and metal shell packaging, the PM FAU is highly durable. It has excellent anti-vibration and anti-shock performance and is designed to operate reliably in temperatures ranging from -40℃ to 85℃.
What industries and applications benefit from PM FAU technology?
PM FAUs are widely deployed in high-speed data centers, telecommunications systems, coherent optical transceivers, silicon photonics modules, and advanced auto-driving sensor technologies.
Does the PM FAU comply with international reliability standards?
Yes, the PM FAU fully complies with the Telcordia GR-1221-CORE reliability standard, ensuring long-term stability and performance in demanding network environments.