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光模块产业学习笔记-磷化铟、EML、DSP

  • 2026-05-16 01:20:32
光模块产业学习笔记-磷化铟、EML、DSP
磷化铟——核心材料:   
    一、定义
    AI基建最上游核心光电材料,作为光模块光芯片中的基础衬底材料,随着光模块速率从800G走到1.6T、3.2T,行业技术难度逐渐提高,整体呈现供不应求的态势。2英寸磷化铟衬底,过去一年多从800美元飙至近2500美元,急单现货价已突破3000美元;6英寸高端衬底从1400美元冲至5000美元,涨幅超250%。
    二、产业现状
    全球磷化铟衬底产能高度集中于日美——日本住友占比43%、美国AXT占比35%、日本JX金属占比13%,三家合计掌控90%以上。国内6英寸衬底国产化率不足5%。
    用量:单台AI服务器所需光模块数量是传统服务器的10倍以上;1.6T光模块对磷化铟的需求,是800G模块的2.7~3倍。2026年全球磷化铟有效产能仅60-75万片/年,市场需求已达260-300万片,缺口超70%,相当于每4片需求仅能匹配1片供给。
    扩产难度大:一是技术壁垒极高。大尺寸、低缺陷磷化铟衬底的良率爬坡就需要3~5年,单条产线投资超10亿元人民币;二是核心设备供应吃紧。磷化铟外延生长所需的MOCVD设备,交货周期长达1~2年,本身就构成扩产瓶颈。
    三、代表上市公司
    云南锗业:A股中唯一实际量产磷化铟单晶片的上市公司,截至2025年底公司磷化铟晶片产能为15万片/年(2-4英寸),2025年公司生产磷化铟晶片10.01万片(2-4寸合计),2026年公司计划生产磷化铟晶片18万片(2—6英寸,以3—4英寸为主)
EML——光芯片:
    一、定义
激光器芯片负责发光,把电信号转化成光信号,往光纤里打出去。EML(Electro-absorption Modulated Laser,电吸收调制激光器)是一种将DFB激光器与电吸收调制器(EAM)集成在同一芯片上的高性能光发射器件。EML是800G/1.6T光模块的核心器件。
    特点:高速率(PAM4调制、单芯片速率可达100Gbps)、低功耗、高消光比(信号干净、误码低)、使用的InP为直接带隙(电子跃迁是竖直跳、不用改变动量,发光效率高)、低啁啾(信号跳变时,激光波长临时漂移,低啁啾就是信号波长不容易跑调,它是通过外置EAM外调制,不改变激光器工作电流,从根源压死啁啾)
    用量:1个800g光模块需要4-8个EML芯片、1.6T光模块翻倍。
    产业链:铟金属 → InP衬底 → InP外延片 → EML芯片 → 光模块 → 数据中心/通信基站
硅光替代方案(CW光源+硅光芯片):受限于磷化铟材料资源限制、外延工艺复杂,采用CW光源作为外置光源,凭借低成本、低功耗优势,成为高速率光模块的新兴主流选择。
    二、代表上市公司
源杰科技:磷化铟激光器芯片标的,10倍股,2025年受益于数据中心业务收入增长,占公司总营业收入比例提升,数据中心毛利率高达72%,市场押注未来数据中心相关产品快速放量,给予极高估值。
DSP芯片——电芯片:
     一、定义
    DSP(数字信号处理器)是800G/1.6T光模块的“大脑”,成本占整颗模块20%–40%,技术壁垒极高。它是信号整形器,将失真、抖动、噪声干扰的电信号转化为干净、准确的数字信号(调制解调、均衡补偿、时钟恢复),再把处理干净的信号交给光芯片去做电光转换。
    二、产业现状
    受制于先进制程受限、SerDes IP缺失以及算法与专利墙,高端的国产百G级DSP仍然处在流片和初步量产阶段。DSP是技术壁垒最高、价值占比最高、国产化最难的种类。800G以上高速DSP赛道由博通和Marvell两家美企垄断,合计占据了90%以上的市场份额,国产化率近乎为零。

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  1. CONNECT:[ UseTime:0.000462s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000728s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000266s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000288s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000529s ]
  6. SELECT * FROM `set` [ RunTime:0.000218s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000591s ]
  8. SELECT * FROM `article` WHERE `id` = 489033 LIMIT 1 [ RunTime:0.000610s ]
  9. UPDATE `article` SET `lasttime` = 1778869332 WHERE `id` = 489033 [ RunTime:0.001063s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000267s ]
  11. SELECT * FROM `article` WHERE `id` < 489033 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000442s ]
  12. SELECT * FROM `article` WHERE `id` > 489033 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000380s ]
  13. SELECT * FROM `article` WHERE `id` < 489033 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001116s ]
  14. SELECT * FROM `article` WHERE `id` < 489033 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001694s ]
  15. SELECT * FROM `article` WHERE `id` < 489033 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000941s ]
0.100513s