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光纖分路器箱（Optical Fiber Splitter Box）是用於光纖通信系統中的光纖分配和連接的重要設備。它常用於以下幾個應用領域：光纖接入網絡（FTTx）：光纖分路器箱在光纖到戶（FTTH）和光纖到樓（FTTB）等光纖接入網絡中扮演關鍵角色。它用於將光纖訊號分配給不同的用戶或樓宇，並提供光纖連接點，使得用戶可以接入高速寬頻網路。

3-D Printing Optical Fiber

Molly Moser X Researchers used 3-D printing to make preforms for a step-index fiber (a) and a structured preform (b). These preforms were then placed in a draw tower (right) to make the final optical fiber. [Image: John Canning, University of Technology Sydney] The entire global telecommunications network, not to mention the ever-expanding Internet-of-Things (IOT), is tied together with string—silica optical fiber. Manufacturing this crucial connector is a laborious process, one that a research team in Australia believes it may have re-invented. Researchers at the University of Technology Sydney and the University of New South Wales have demonstrated a way to 3-D print a glass preform for fabricating glass optical fiber (Opt. Lett., doi: 10.1364/OL.44.005358). This method, according to the team, simplifies fiber production as well as enabling both novel fiber designs and applications. The art of drawing fiber Silica optical fiber has a multitude of applications, but it’s expensive and labor-intensive to make. It comprises two parts: the fiber core that carries light, and the cladding that traps the light in the core as it travels through the fiber. In order to minimize loss and keep the light trapped in the core, the fiber core must have a higher refractive index than the fiber cladding. Conventional methods of constructing the preform through which optical fiber can be drawn require spinning a hollow tube of glass with a carefully controlled refractive index profile on a lathe over a heat source. It’s essential that the fiber geometry is precisely centered during this process. 3-D printing the preform instead is thus a very attractive alternative—one that several members of the Australian team have been working toward for a while. Several years ago, the team successfully demonstrated the first fiber drawn from a 3-D-printed polymer preform. Applying this additive-manufacturing technique to glass, however, presents a tricky manufacturing challenge, as 3-D printing glass requires temperatures of more than 1900 °C. Researchers shone green light through the final optical fiber and measured loss. The orange inset shows a fiber cross-section. [Image: John Canning, University of Technology Sydney] Printing glass To apply the approach to glass, the team behind the latest study added silica nanoparticles into the photo-curable resin. The researchers then used direct-light projection (DLP) to 3-D print the cladding preform with UV light at 385 nm, and poured a clever mixture of polymer and silica nanoparticles—this time doped with germanosilicate—into the hollow, cylindrical preform. The addition of the germanosilicate to the core resin upped the refractive index. To overcome the heat quandary, the researchers applied a thermal debinding process. The debinding sloughs off the polymer and other impurities, leaving the silica nanoparticles behind, which are held together by intermolecular forces. Kicking up the heat even more, the researchers then fused the nanoparticles into a solid structure that could be inserted into a draw tower to be molded into the optical fiber. According to the team, the end result was the first silica fibers drawn from 3-D-printed preforms. Scattering and next steps To test the quality of the first-of-its-kind fiber, the researchers shone 532-nm green light through 2 meters of both single-mode and multimode fiber—and measured significant loss. But while the team concedes that there is “considerable scope to improve the transmission properties of this fiber,” the researchers also believe that the relative ease with which the fiber was created could make the technique a game changer for future fiber fabrication. In particular, the team suspects that this new method could enable the production of incredibly complex multicore and multi-shaped fiber designs for previously unrealizable applications. According to a press release accompanying the work, the researchers are interested in partnering with a fiber manufacturer to improve and eventually commercialize the technology.

75Ω数字配线架及单元

发布时间：

2022-12-08 18:11

75Ω数字配线架及单元

PCT 数字配线架包括特性阻抗为75Ω的L9 、C6、C3 系列产品。适用于2-155Mbit/s (C6系列为2-34Mbit/s) 间的数字复用设备之间、数字复用设备与程控交换设备的配线连接，能够实现数字信号的调度、传输和测试。

使用环境
■ 温度: -5℃～+40℃
■ 相对湿度: ≤85% (+30℃)
■ 大气压力: 70Kpa～106Kpa

技术指标
电气性能
■ 特性阻抗: 75Ω
■ 工作速率: 2～155 Mbit/s; 2～34 Mbit/s (C6系列)
■ 接触电阻: 外导体: ≤2.5mΩ
内导体: ≤5 mΩ
■ 绝缘电阻: ≥1000MΩ ( DC 500V±50V)
■ 抗电强度：50Hz, AC ≥1000V, 持续时间1分钟，不击穿，无飞弧
■ 回线间串音防卫度:: ≥70dB (50KHz～233MHz)
≥70dB (50KHz～51MHz) (C6系列)
■ 插入损耗: ≤0.3 dB (50KHz～233MHz)
≤0.3 dB (50KHz～51MHz) (C6系列)
■ 回波损耗: ≥18dB (50KHz～233MHz)
≥18dB (50KHz～51MHz) (C6系列)

机械性能
■ 拉脱力:＞50N
■ 脱离力: 2.2-10N (无锁定) ;2.2-20N (C6系列)
■ 机械耐久力: 500 次插拔以上

同轴连接器材料
■ 导体弹性材料: 铍青铜或锡青铜
■ 内外导体接触区域: 中间镀镍层，再镀金钴合金
■ 绝缘材料: PTFE

· L9系列数字配线架

MPX-P02-SM2　MPX-P02-SM3　MPX-P02-SM4　MPX-P02-SM5　MPX-P02-SM6　MPX-P02-SM7

· 优质钢板，静电喷涂，开放式或封闭式结构
· 采用单面覆铜板（表面镀镍）联接同轴连接器外导体，用户只需将接地线与机架接地铜条连接即可完成所有外导体的屏蔽接地，具有良好、独立、可靠的工作地和保护地系统
· 同轴连接器为75Ω SIMENS型，插头与插座采用螺纹连接结构，稳定可靠，同轴插座与同轴电缆连接采用内导体焊接，外导体压接的方式
· 镀金的75Ω同轴连接器，接触电阻低，插拔可靠

· C6系列数字配线架

MPX-P02-FS

· 优质钢板，静电喷涂，开放式结构
· 采用单面覆铜板（表面镀镍）联接同轴连接器外导体，用户只需将接地线与机架接地铜条连接即可完成所有外导体的屏蔽接地，具有良好、独立、可靠的工作地和保护地系统
· 同轴连接器为75Ω SIMENS型，插头与插座采用螺纹连接结构，稳定可靠，同轴插座与同轴电缆连接采用内导体焊接，外导体压接的方式 · 可选择的L9、C6 系列镀金的75Ω同轴连接器，接触电阻低，插拔可靠

· C3系列数字配线架

MPX-P02-AT3　MPX-P02-AT4

· 优质钢板，静电喷涂，敞开式结构.
· 采用单元式结构，不锈钢安装面板，与端子外导体直接相连，接地可靠
· 同轴插座与同轴电缆连接采用内导体焊接，外导体压接的方式
· C3系列镀金的75Ω同轴连接器为AT&T型，卡簧式锁定结构。
· 镀金的75Ω同轴连接器，接触电阻低，插拔可靠

· 75Ω 数字配线单元

19SMDY-P04　19FSDY-P01H　19FSDY-P01L

· 19″齐平安装，适用于19″网络机柜
· 可选择的L9、C6 系列镀金的75Ω同轴连接器，接触电阻低，插拔可靠
· 采用单面覆铜板（表面镀镍）联接同轴连接器外导体，用户只需将接地线与机架接地铜条连接即可完成所有外导体的屏蔽接地，具有良好、独立、可靠的工作地和保护地系统
· 单元体可向下翻转90°或者180°，易于电缆成端

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