OM3 – 深圳福欣智能 //www.lqsdjs.com 福禄克测试仪|FLUKE万用?#124;代理DTX-1800|DSX-5000|OPVXG Fri, 18 Nov 2016 06:28:05 +0000 zh-CN hourly 1 //wordpress.org/?v=6.5.2 光纤光缆知识：OM3与OM4光纤有何不同?/title> <link>//www.lqsdjs.com/html/om3-om4-distinction.html</link> <comments>//www.lqsdjs.com/html/om3-om4-distinction.html#respond</comments> <dc:creator><![CDATA[福欣智能]]></dc:creator> <pubDate>Fri, 18 Nov 2016 06:28:05 +0000</pubDate> <category><![CDATA[技术专栏]]></category> <category><![CDATA[OM3]]></category> <category><![CDATA[om3光纤]]></category> <category><![CDATA[OM4]]></category> <category><![CDATA[om4光纤]]></category> <category><![CDATA[光纤]]></category> <category><![CDATA[光缆]]></category> <guid isPermaLink="false">//www.fluck.cn/?p=3762</guid> <description><![CDATA[光纤光缆知识：OM3与OM4光纤有何不同?OM3和OM4多模光纤是局域网中常用的两种光纤——通常用于电信机房之间以及数据中心主网与存储区域网?SAN)交换机之间的骨干网布线?这两种类型的?.. ]]></description> <content:encoded><![CDATA[<p><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%85%89%e7%ba%a4" title="View all posts in 光纤" target="_blank">光纤</a></span><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%85%89%e7%bc%86" title="View all posts in 光缆" target="_blank">光缆</a></span>知识?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om3" title="View all posts in OM3" target="_blank">OM3</a></span>?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om4" title="View all posts in OM4" target="_blank">OM4</a></span><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%85%89%e7%ba%a4" title="View all posts in 光纤" target="_blank">光纤</a></span>有何不同?/p> <p><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om3" title="View all posts in OM3" target="_blank">OM3</a></span>?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om4" title="View all posts in OM4" target="_blank">OM4</a></span>多模光纤是局域网中常用的两种光纤——通常用于电信机房之间以及数据中心主网与存储区域网?SAN)交换机之间的骨干网布线?/p> <p>这两种类型的光纤都是激光优化的50/125多模光纤，也就是两者的纤芯直径均为50 µm，包层直径为125 µm，经过特殊包覆，防止纤芯漏光。这两种光纤使用相同的连接器、相同的端接和相同的收发器——垂直腔面发射激光器(VCSEL)，发射波长为850 nm的红外光?/p> <p><img fetchpriority="high" decoding="async" title="1479371294909027966.png" src="//www.lqsdjs.com/wp-content/uploads/flukeimg/2016/11/062805HPM.png" alt="1479371294909027966.png" width="700" height="443" border="0" vspace="0" /></p> <p>由于两者非常相似，并且制造商一般采用相同的浅绿色电缆插头和连接器，很难区分这两种光纤类型。但也有一些差异值得注意?/p> <p><strong>纤芯的能力决定一?/strong></p> <p><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om3" title="View all posts in OM3" target="_blank">OM3</a></span>?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om4" title="View all posts in OM4" target="_blank">OM4</a></span>多模光纤的主要区别在于纤芯的内部构造。光纤链路要想正常工作，VCSEL收发器发射的光必须具有足够大的功率，能够到达另一端的接收器。有两个参数指标影响这一性能——光衰减和模式色散?/p> <p>衰减的单位为分贝(dB)，指光信号从A点传输到B点时的功率损耗，这种损耗是由于连接器、接头以及电缆长度造成的。模式色散指光信号沿光纤传输时的模式扩散程度。如果不同模式光的扩散程度太严重，另一端的接收器将难以对信号进行解码?/p> <p>模式色散用于确定光纤的模式带宽。模式带宽以MHz·km为单位表示，仅限于实验室测试，表示光纤在特定距离内传输特定量信息的能力。注意——这里很容易引起混淆。模式色散越高，模式带宽越低；模式色散越低，模式带宽越高，传输的信息量越大?/p> <p><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om3" title="View all posts in OM3" target="_blank">OM3</a></span>?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om4" title="View all posts in OM4" target="_blank">OM4</a></span>多模光纤之间的真实区别是OM4具有较高的模式带宽—?700 MHz·km，?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om3" title="View all posts in OM3" target="_blank">OM3</a></span>光纤?000 MHz·km。这意味着OM4光纤在相同的距离内可传输更多的信息?/p> ]]></content:encoded> <wfw:commentRss>//www.lqsdjs.com/html/om3-om4-distinction.html/feed</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item> <title>什么是OM4光纤?/title> <link>//www.lqsdjs.com/html/what-is-om4-fiber.html</link> <comments>//www.lqsdjs.com/html/what-is-om4-fiber.html#respond</comments> <dc:creator><![CDATA[福欣智能]]></dc:creator> <pubDate>Thu, 11 Aug 2016 10:09:38 +0000</pubDate> <category><![CDATA[技术专栏]]></category> <category><![CDATA[OM3]]></category> <category><![CDATA[OM4]]></category> <category><![CDATA[什么是OM4光纤]]></category> <category><![CDATA[光纤]]></category> <category><![CDATA[光纤带宽]]></category> <category><![CDATA[多模光纤]]></category> <guid isPermaLink="false">//www.fluck.cn/?p=3680</guid> <description><![CDATA[OM4光纤是一种激光优化型纤芯?0μm的多模光纤，目前标准确定的指标实际是一种OM3多模光纤的升级版。现在许多公司在市场上销售的OM3光纤，其实际指标已经达到OM4的标准?目前的OM4标准与OM... ]]></description> <content:encoded><![CDATA[<p><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om4" title="View all posts in OM4" target="_blank">OM4</a></span><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%85%89%e7%ba%a4" title="View all posts in 光纤" target="_blank">光纤</a></span>是一种激光优化型纤芯?0μm?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%a4%9a%e6%a8%a1%e5%85%89%e7%ba%a4" title="View all posts in 多模光纤" target="_blank">多模光纤</a></span>，目前标准确定的指标实际是一?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om3" title="View all posts in OM3" target="_blank">OM3</a></span><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%a4%9a%e6%a8%a1%e5%85%89%e7%ba%a4" title="View all posts in 多模光纤" target="_blank">多模光纤</a></span>的升级版。现在许多公司在市场上销售的<span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om3" title="View all posts in OM3" target="_blank">OM3</a></span><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%85%89%e7%ba%a4" title="View all posts in 光纤" target="_blank">光纤</a></span>，其实际指标已经达到<span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om4" title="View all posts in OM4" target="_blank">OM4</a></span>的标准?/p> <p>目前?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om4" title="View all posts in OM4" target="_blank">OM4</a></span>标准?span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om3" title="View all posts in OM3" target="_blank">OM3</a></span><span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%85%89%e7%ba%a4" title="View all posts in 光纤" target="_blank">光纤</a></span>相比，只是在<span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%85%89%e7%ba%a4%e5%b8%a6%e5%ae%bd" title="View all posts in 光纤带宽" target="_blank">光纤带宽</a></span>指标做了提升。即<span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/om4" title="View all posts in OM4" target="_blank">OM4</a></span>标准?50nm波长的有效模式带宽（EMB）和满注入带宽（OFL）相比OM3 <span class='wp_keywordlink_affiliate'><a href="//www.lqsdjs.com/html/tag/%e5%85%89%e7%ba%a4" title="View all posts in 光纤" target="_blank">光纤</a></span>都做了提高。下面的表格为具体的指标要求?/p> <p>OM3光纤 OM4光纤</p> <p>850nm 激光性能带宽</p> <p>EMB（MHz.km?2000  4700</p> <p>850nm LED光源带宽</p> <p>OFL（MHz.km?1500  3500</p> <p>1300nm LED光源带宽</p> <p>OFL（MHz.km?500 500</p> ]]></content:encoded> <wfw:commentRss>//www.lqsdjs.com/html/what-is-om4-fiber.html/feed</wfw:commentRss> <slash:comments>0</slash:comments> </item> </channel> </rss>