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AI全链路连接产业链

AI全链路连接产业链

AI整理,个人学习记录,不做任何推荐!

AI全链路连接产业链深度梳理:从芯片到跨城数据中心,四大细分赛道核心标的全解析

导语

AI算力建设的核心逻辑是算力互联互通,一台AI服务器从芯片内部、机柜内部、跨机柜集群再到异地数据中心组网,依靠全链条光电连接器件实现算力高效流转。当前全球大模型迭代提速、海外云厂商持续加码资本开支,带动芯片级、机柜内、机柜间、数据中心间四层连接硬件全面进入景气周期。本文依据产业链从内到外的层级划分,拆解四大细分板块核心个股,同步补充前沿技术赛道与行业逻辑,完整梳理AI连接全产业链投资脉络。

一、芯片级连接:GPU与芯片近端互联,算力单机扩容基石

赛道定位:聚焦单服务器内部GPU、CPU、内存之间近距离电/光互联,是Scale-up(单机纵向堆叠算力)的最上游核心硬件,核心产品围绕PCIe Retimer、PHY芯片、COF光引擎、CXL互联芯片,解决高速信号衰减、内存池化拓展痛点,直接受益英伟达GB200/HGX整机放量。

1. 澜起科技:全球PCIe Retimer龙头,PCIe5.0产品全球市占第二,MR-DIMM配套芯片适配AI服务器内存扩容的Scale-up架构,2026年相关订单逐步落地;同时深度布局CXL新一代互联协议,是国内CXL芯片先发厂商。

2. 万通发展:通过并购切入高端芯片赛道,旗下PCIe5.0交换芯片实现量产,前瞻布局PCIe6.0芯片与配套CCL覆铜板基材,紧跟PCIe规格迭代红利。

3. 裕太微:以太网PHY芯片龙头,产品覆盖服务器、交换机板载PHY,在数据中心+车载双线布局,依托AI服务器以太网配置提升实现业绩增长。

4. 天孚通信:COF封装光器件龙头,1.6G光引擎已批量落地,FAU光纤阵列是Scale-up短距光互联关键零部件,深度绑定英伟达供应链;同时是CPO共封装光学核心器件供应商,受益光模块封装技术革新。

补充延伸概念:CXL互联

CXL是替代传统PCIe的下一代互联协议,可实现CPU与GPU内存资源池化,是未来高端AI服务器标配。除澜起科技外,国芯科技、全志科技为国内CXL协议及配套芯片重点布局企业。

二、机柜内连接:同柜GPU高密度组网,Scale-up核心硬件

赛道定位:同一机柜内部GPU、光模块、主板之间短距离互连(0-5米),是单机柜算力堆叠落地的关键环节,核心品类:800G/1.6T光模块、高速连接器、高端PCB/背板、有源铜缆,为AI整机单机算力提升提供硬件支撑。

1. 中际旭创:全球光模块绝对龙头,全球800G/1.6T光模块市占约25%,英伟达、谷歌、亚马逊核心一级供应商,2026年月产能可达150万只;同时深度布局CPO共封装光模块,是行业技术迭代核心受益标的。

2. 太辰光:WDM高速光连接龙头,深度绑定康宁,Scale-up光互联配套产品订单同比大幅抬升,2026年产能规划翻倍。

3. 嘉华股份:高速I/O、Overspeed连接器主力厂商,华为AI服务器系统供应商,产品配套800G光模块连接器。

4. 华丰科技:高速背板连接器国产龙头,获华为昇腾供应链定点,AI机柜单套连接器价值1-2万元,2026年在手订单突破10万套。

5. 鼎通科技:安费诺国内核心外协厂商,224G高速连接器实现量产,产品直接适配英伟达GB200整机机柜,2026年相关订单同比增长80%;同时布局液冷机柜配套连接器,受益AI高功耗液冷渗透趋势。

6. 沪电股份:英伟达服务器PCB板第一梯队供应商,高端背板份额超30%,RUBIN Ultra机柜背板单柜价值高达120万元,2026年一季度业绩实现60%以上净利增长。

补充延伸概念1:CPO共封装光学

CPO将交换芯片与光引擎一体化封装,大幅缩短互联距离、降低功耗,是下一代机柜内光连接主流技术路线。除旭创、天孚外,新易盛、光迅科技、华工科技为国内CPO产业链重点企业。

补充延伸概念2:液冷配套连接器

AI服务器功耗持续走高,风冷逐步向液冷切换,液冷连接器、高速接插件为配套刚需,相关标的还有英维克、合盛硅业。

补充延伸概念3:有源电缆(AEC)

短距有源铜缆是机柜内低成本互联方案,中航光电、立讯精密为行业龙头厂商。

三、机柜间连接:跨机柜算力集群组网,Scale-out横向扩容刚需

赛道定位:不同机柜之间中长距离互联(5-100米),对应AI集群Scale-out横向扩容逻辑,成千上万台服务器通过交换机、有源线缆组建万卡算力集群,核心产品:高端以太网交换芯片、有源高速线缆、白牌AI交换机,是大模型训练集群建设必备。

1. 盛科通信:国产高端以太网交换芯片稀缺标的,25.6T交换机芯片已实现量产,51.2T超高规格芯片规划2028年流片落地,是国产Scale-out交换机芯片核心供应商。

2. 瑞可达:400G高速有源线缆龙头,产品导入阿里、字节等国内头部云厂商,适配AI机框300G~800G跨机柜互联,2026年订单进入集中兑现期。

3. 凯旺网络:全球交换机配套线缆龙头,产品供货阿里、华为、新易盛等头部企业,2026年AI交换机线缆业务业绩预期向好。

4. 菲菱科思:白牌AI交换机ODM厂商,前瞻性布局液冷配套交换机,2026年AI交换机业务有望贡献亿元级增量业绩。

补充延伸概念:RoCE以太网

RoCE协议依托RDMA技术实现以太网低延迟传输,逐步替代传统IB协议成为AI集群组网主流方案,产业链相关上市公司:紫光股份、星网锐捷。

四、数据中心间连接:跨城算力调度,长距DCI互联产业链

赛道定位:跨地域、跨数据中心长距离光纤互联(公里级),承担异地算力调度、算力池互联互通功能,核心产品:ZR/ZR+相干DCI光模块、空芯特种光纤、铌酸锂光调制器、DCI系统集成设备,受益全国一体化算力网络建设与海外跨国数据中心组网需求。

1. 德科立:诺基亚、西门子相干光模块主力代工厂,400G/600G ZR长距光模块批量交付,泰国+国内双基地产能2026年集中释放,产品全球市占稳步提升。

2. 腾景科技:谷歌OCE光芯片核心供应商,NEMS光开关批量供货,2026年OCE相关业务收入预期突破3亿元。

3. 光库科技:铌酸锂高速光调制器国产龙头,DCI长距传输核心元器件,联合海外企业落地硅基DCI整套解决方案,2026年产能持续爬坡。

4. 长飞光纤:空芯光纤国内产业化先行者,产品进入谷歌、微软DCI光纤供应链,2026年特种光纤业务收入同比预计+50%。

5. 亨通光电:国内少有的DCI全产业链系统集成商,斩获数十亿美元海外DCI总包订单,400ZR/800ZR长距相干模块批量落地,2026年DCI业务目标营收50亿元以上。

五、全产业链投资逻辑总结

AI连接产业链遵循从芯片内部→单机柜→跨机柜→跨数据中心由内向外四层架构,景气驱动来源于两大核心:其一,全球大模型参数持续升级,头部科技公司不断加码AI服务器采购,GB200/HGX整机放量带动四层硬件同步需求上行;其二,Scale-up单机堆叠+Scale-out集群扩容双技术路线并行,叠加CPO、CXL、铌酸锂调制器等新技术迭代,带来产品量价齐升红利。

从投资节奏来看,短期800G/1.6T光模块、高速连接器业绩兑现确定性最强;中期CXL、CPO、RoCE交换机随技术落地逐步放量;长期DCI长距互联受益全国算力网与海外跨国数据中心建设成长。

风险提示

全球云厂商资本开支不及预期、光模块/连接器行业价格战加剧、新技术落地进度低于市场预期、海外地缘贸易扰动供应链。

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  1. CONNECT:[ UseTime:0.000458s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000778s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.007882s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000499s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000471s ]
  6. SELECT * FROM `set` [ RunTime:0.000228s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000540s ]
  8. SELECT * FROM `article` WHERE `id` = 705738 LIMIT 1 [ RunTime:0.000391s ]
  9. UPDATE `article` SET `lasttime` = 1780540928 WHERE `id` = 705738 [ RunTime:0.006574s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000208s ]
  11. SELECT * FROM `article` WHERE `id` < 705738 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000491s ]
  12. SELECT * FROM `article` WHERE `id` > 705738 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000369s ]
  13. SELECT * FROM `article` WHERE `id` < 705738 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000832s ]
  14. SELECT * FROM `article` WHERE `id` < 705738 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002244s ]
  15. SELECT * FROM `article` WHERE `id` < 705738 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001943s ]
0.109069s