ZG Tech: The Outstanding Promoter in the Field of Polarization-Maintaining Devices

In the continuous evolution process of optical communication technology, polarization-maintaining devices have gradually emerged and become the core elements to solve many key problems. ZG Tech, as a pioneer in this field, with unwavering innovative spirit and profound technical strength, has left a solid and profound mark on the development path of polarization-maintaining devices.

在光通信技术蓬勃发展的今天，保偏器件已成为推动行业进步的关键力量。深圳市中葛科技有限公司，作为行业内的领军企业，凭借卓越的技术创新能力和对品质的执着追求，在保偏器件领域取得了一系列令人瞩目的成就，不断为全球光通信产业的发展贡献着重要力量。

The development of polarization-maintaining devices stems from a deep understanding of the inherent defects of ordinary optical fibers. Ordinary optical fibers, due to their difficult-to-overcome ellipticity and residual stress, combined with the unavoidable influence of external forces and magnetic fields in the usage process, result in the random change of the polarization state of light transmitted within them. This characteristic severely restricts the improvement of system performance in application scenarios with extremely strict requirements for the polarization state, such as in wavelength division multiplexing interference, thus highlighting the importance and necessity of polarization-maintaining devices.

保偏器件的兴起，源于普通光纤在实际应用中的诸多局限。普通光纤由于其结构上难以消除的椭圆度以及残余应力，加上使用环境中无处不在的外力和磁场影响，使得光在其中传输时偏振态随机变化。这种不稳定在分波干涉等高精度应用场景中，严重制约了系统性能的提升。据统计，因偏振态不稳定导致的功率损耗可使系统灵敏度降低达 30% 以上，在一些对精度要求极高的实验环境中，甚至可能使测量误差增大 50%。保偏器件的出现，为解决这些问题提供了根本性的解决方案。

ZG Tech has demonstrated extraordinary strength and remarkable achievements in the research, development, and production of polarization-maintaining devices.

深圳市中葛科技有限公司在保偏器件研发和生产方面展现出了强大的实力。

In the field of polarization beam combiners (PBCs), ZG Tech's product technology is at the forefront of the industry. The company's PBC based on the birefringent prism technology performs excellently in pump enhancement and elimination of polarization dependence. In actual application tests, the distributed fiber Raman amplifier (FRA) system using this PBC has achieved a pump efficiency improvement of more than 40%, effectively solving the problem of insufficient pump power in previous systems. When used in reverse as a polarization beam splitter, its extinction ratio is as high as above 30 dB, with a significantly better polarizing effect than similar products. The IPBC and IPBS products further developed based on this technology integrate isolator functions and can suppress the upstream reflected light to an extremely low level. The peak isolation of the double-stage IPBC/S product has been measured to reach 65 dB, providing reliable protection for high-end optical communication systems.

在偏振光合束器（PBC）领域，中葛科技的产品技术处于行业前沿。公司研发的基于双折射棱镜技术的 PBC，在泵浦增强与消除偏振依赖性方面表现卓越。在实际应用测试中，使用该 PBC 的分布式 FRA 系统，泵浦效率提升了 40% 以上，有效解决了以往系统中泵浦功率不足的问题。其反向使用时作为偏振光分束器，消光比高达 30dB 以上，起偏效果显著优于同类产品。基于此项技术进一步研发的 IPBC、IPBS 产品，集成了隔离器功能，可将上游反射光抑制到极低水平，双级型 IPBC/S 产品的峰值隔离度实测可达 65dB，为高端光通信系统提供了可靠的保障。

In the area of polarization-maintaining couplers, ZG Tech has achieved fruitful results. The polarization-maintaining coupler produced by the company using the fused biconical taper method has a stress axis alignment accuracy controlled within ±0.5°, an additional loss lower than 0.2 dB, and a volume reduced by 30% compared to traditional products, successfully breaking the foreign technology monopoly and achieving domestic substitution. For example, in a large-scale fiber-optic sensing network project, ZG Tech's fused biconical taper polarization-maintaining couplers have been deployed in thousands of nodes and operate stably and reliably with a failure rate lower than 0.1%. The polarization-maintaining coupler produced by the thin-film waveplate splitting method, relying on the mature coating process, has a wavelength accuracy of up to ±0.1 nm and is widely used in high-precision spectral analysis systems. The extinction ratio of the prism splitting polarization-maintaining coupler has reached above 35 dB and has played a crucial role in quantum communication experiments with extremely high requirements for the polarization state.

保偏耦合器方面，中葛科技成果丰硕。公司采用融锥法生产的保偏耦合器，应力轴对准精度控制在 ±0.5° 以内，附加损耗低于 0.2dB，体积相较于传统产品缩小了 30%，成功打破国外技术垄断，实现了国产化替代。以某大型光纤传感网络项目为例，中葛科技的融锥法保偏耦合器在数千个节点的部署中，运行稳定可靠，故障率低于 0.1%。薄膜波片分光法生产的保偏耦合器，凭借成熟的镀膜工艺，波长精度可达 ±0.1nm，在高精度的光谱分析系统中得到广泛应用。而棱镜分光法保偏耦合器的消光比达到了 35dB 以上，在对偏振态要求极高的量子通信实验中发挥了关键作用。

ZG Tech's 80μm small-cladding fiber product series has unique advantages. Compared with the traditional 125μm cladding diameter polarization-maintaining fiber, the 80μm fiber has a bending loss reduction of more than 40% and a 50% improvement in wiring flexibility in a narrow space. In the application of fiber-optic gyroscopes, after long-term stability testing, the drift rate of the 80μm fiber system is 25% lower than that of the 125μm fiber system, greatly improving the measurement accuracy and reliability. For instance, in the inertial navigation system of a certain aerospace vehicle, after adopting ZG Tech's 80μm fiber-optic gyroscope, the navigation accuracy has been increased by 20%, providing strong support for the success of the flight mission. In Doppler velocimeters, the speed measurement accuracy of this series of products can reach ±0.01 m/s, the resolution of holographic detectors has been increased by 30%, and the sensitivity of hydrophones has been improved by more than 20 dB, which are widely used in fields such as ocean exploration and biomedical imaging.

中葛科技的 80um 小包层光纤产品系列更是独具优势。与传统 125um 包层直径保偏光纤相比，80um 光纤的弯曲损耗降低了 40% 以上，在狭小空间内的布线灵活性提升了 50%。在光纤陀螺仪应用中，经过长时间稳定性测试，80um 光纤系统的漂移率较 125um 光纤系统降低了 25%，大大提高了测量精度和可靠性。例如，在某航天飞行器的惯性导航系统中，采用中葛科技的 80um 光纤陀螺仪后，导航精度提升了 20%，为飞行任务的成功提供了有力支持。该系列产品在多普勒速度计中的测速精度可达 ±0.01m/s，全息探测器的分辨率提高了 30%，水听器的灵敏度提升了 20dB 以上，广泛应用于海洋探测、生物医学成像等领域。

In addition, ZG Tech has also been continuously innovating in products such as polarizers, polarization-maintaining wavelength division multiplexers, polarization-maintaining circulators, and polarization-maintaining isolators. The company's independently developed all-fiber single-polarization fiber polarizer has a polarization degree as high as above 99.9%, providing high-purity polarized light for optical communication systems. The channel isolation of the polarization-maintaining wavelength division multiplexer has reached above 40 dB, enabling efficient multiplexing and demultiplexing of multi-wavelength signals. The insertion loss of the polarization-maintaining circulator is lower than 0.5 dB, and the return loss is greater than 50 dB, ensuring the stable transmission of optical signals in the ring structure. The isolation of the polarization-maintaining isolator has reached above 45 dB, and it also has excellent polarization-maintaining performance, effectively protecting the light sources and detectors in optical communication systems.

此外，中葛科技在起偏器、保偏波分复用器、保偏环形器、保偏隔离器等产品上也不断创新。公司自主研发的全光纤型单偏振光纤起偏器，偏振度高达 99.9% 以上，为光通信系统提供了高纯度的偏振光。保偏波分复用器的通道隔离度达到了 40dB 以上，可实现多波长信号的高效复用和解复用。保偏环形器的插入损耗低于 0.5dB，回波损耗大于 50dB，确保了光信号在环形结构中的稳定传输。保偏隔离器的隔离度达到了 45dB 以上，同时具备优异的保偏性能，有效保护了光通信系统中的光源和探测器。

ZG Tech has always regarded promoting the development of polarization-maintaining device technology as its own important mission. With a rich product line and leading technical indicators, the company occupies an important position in the global polarization-maintaining product market. The company actively cooperates with domestic and foreign scientific research institutions and enterprises to jointly overcome technical difficulties and promote the formulation of industry standards.

深圳市中葛科技有限公司始终以推动保偏器件技术发展为己任，凭借丰富的产品线和领先的技术指标，在全球保偏产品市场中占据重要地位。公司积极与国内外科研机构和企业开展合作，共同攻克技术难题，推动行业标准的制定。

Looking to the future, ZG Tech will continue to lead the innovation and development trend in the field of polarization-maintaining devices. In the context of the large-scale construction of 5G communication, the rapid development of data centers, and the continuous upgrading of intelligent sensing technology, ZG Tech will continue to increase its research and development investment, launch more high-performance and low-cost polarization-maintaining device products, inject new vitality into the prosperity and development of the global optical communication industry, and jointly open a new chapter in optical communication technology with partners.please refer to the official website www.optical-solution.com or contact Yuki< zgsales1@optical-solution.com >.

展望未来，深圳市中葛科技有限公司将继续引领保偏器件领域的创新发展潮流。在 5G 通信大规模建设、数据中心高速发展以及智能传感技术不断升级的大背景下，中葛科技将不断加大研发投入，推出更多高性能、低成本的保偏器件产品，为全球光通信产业的繁荣发展注入新的活力，携手合作伙伴共同开启光通信技术的新篇章。订购详情，请见官网www.optical-solution.com，或联系邮箱:Yuki.