en.Wedoany.com Reported - Hengtong Optic-Electric recently announced a core technological breakthrough in its self-developed CPO (Co-Packaged Optics) polarization-maintaining fiber. Polarization-maintaining fiber is the core transmission medium that preserves the polarization state of optical signals, and its process precision directly affects the coupling efficiency and signal stability of CPO systems. With advantages such as low latency, high bandwidth, and low power consumption, CPO has become a key technology for optical interconnection in next-generation AI data centers, but it imposes extremely high requirements on tolerance control, where sub-micron lateral misalignment can lead to significant optical power loss. For a long time, traditional Panda-type polarization-maintaining fibers have commonly suffered from issues such as large fluctuations in bare fiber diameter and asymmetric stress-applying parts (cat-eye structures), making it difficult to meet the iterative upgrades of high-end CPO technology, thus becoming a common industry technical bottleneck.

Through its self-developed HPPD high-precision polarization-maintaining fiber drawing technology, Hengtong Optic-Electric has introduced a precision tension control and online real-time compensation system, improving the bare fiber diameter control precision to ±0.1 microns, far surpassing traditional process precision. This ultra-high fiber diameter consistency effectively resolves the error amplification issue in high-density fiber arrays, ensuring fiber positioning accuracy and silicon photonic chip coupling efficiency in FAU high-density packaging scenarios, meeting the stringent assembly requirements of high-end CPO equipment.

Using HPPQ high-precision quartz processing technology, Hengtong Optic-Electric precisely controls the size and position of the fiber's "cat-eye" stress-applying parts, solving the industry challenge of "uneven cat-eye sizes" and controlling the symmetry of the stress-applying parts to within 0.2 microns, achieving the "three cores in one line" precision alignment standard. This technology enhances the fiber's polarization stability and extinction ratio performance, ensuring extremely low crosstalk when external laser sources are connected to the CPO system at the source, guaranteeing high-quality and stable transmission of high-speed optical signals.

This breakthrough in polarization-maintaining fiber technology by Hengtong Optic-Electric provides critical material support for next-generation optical interconnection technologies such as CPO, and also demonstrates the independent innovation capability of Chinese enterprises in the field of high-end optical communication materials. The company stated that it will continue to focus on the core technology research and development of specialty fibers, break through technical barriers in the high-end optical interconnection field, and support the development of global AI computing infrastructure with high-precision, high-stability optical communication materials.

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