Coherent Demonstrates Industry’s First 400G Differential Electro-Absorption Modulated Laser
Coherent Corp. (NYSE: COHR) has unveiled the industry's first 400 Gb/s Differential Electro-absorption Modulated Laser (D-EML) at OFC 2025, advancing high-speed optical networking for data centers. This innovation builds upon their successful 200G D-EML, which received recognition in the 2025 Lightwave+BTR Innovation Reviews.
The differential design doubles signal amplitude while reducing power consumption and minimizing crosstalk, delivering superior OMA and ER performance. The D-EML features integrated on-chip termination network for optimized electrical performance and is designed for low-cost, non-hermetic packaging solutions.
The 400G D-EML will be available under controlled availability, while the 200G D-EML is expected for general release in 2026. Demonstrations will be held at OFC 2025 in San Francisco, April 1-3 at booth #1519.
Coherent Corp. (NYSE: COHR) ha svelato il primo Laser Modulato Elettro-assorbente Differenziale (D-EML) da 400 Gb/s del settore all'OFC 2025, portando avanti il networking ottico ad alta velocità per i data center. Questa innovazione si basa sul loro D-EML da 200G di successo, che ha ricevuto riconoscimenti nelle recensioni di innovazione Lightwave+BTR 2025.
Il design differenziale raddoppia l'ampiezza del segnale riducendo al contempo il consumo energetico e minimizzando il crosstalk, offrendo prestazioni OMA ed ER superiori. Il D-EML presenta una rete di terminazione integrata on-chip per ottimizzare le prestazioni elettriche ed è progettato per soluzioni di imballaggio a basso costo e non ermetiche.
Il D-EML da 400G sarà disponibile con disponibilità controllata, mentre il D-EML da 200G è previsto per il rilascio generale nel 2026. Le dimostrazioni si terranno all'OFC 2025 a San Francisco, dal 1 al 3 aprile allo stand #1519.
Coherent Corp. (NYSE: COHR) ha presentado el primer Laser Modulado por Electroabsorción Diferencial (D-EML) de 400 Gb/s de la industria en OFC 2025, avanzando en la red óptica de alta velocidad para centros de datos. Esta innovación se basa en su exitoso D-EML de 200G, que recibió reconocimiento en las Revisiones de Innovación Lightwave+BTR 2025.
El diseño diferencial duplica la amplitud de la señal mientras reduce el consumo de energía y minimiza la diafonía, ofreciendo un rendimiento superior en OMA y ER. El D-EML cuenta con una red de terminación integrada en el chip para un rendimiento eléctrico optimizado y está diseñado para soluciones de embalaje de bajo costo y no herméticas.
El D-EML de 400G estará disponible bajo disponibilidad controlada, mientras que se espera que el D-EML de 200G se lance en 2026. Las demostraciones se llevarán a cabo en el OFC 2025 en San Francisco, del 1 al 3 de abril en el stand #1519.
코히어런트 코퍼레이션 (NYSE: COHR)는 OFC 2025에서 업계 최초의 400 Gb/s 차동 전자흡수 변조 레이저(D-EML)를 발표하여 데이터 센터를 위한 고속 광 네트워킹을 발전시켰습니다. 이 혁신은 2025 Lightwave+BTR 혁신 리뷰에서 인정을 받은 성공적인 200G D-EML을 기반으로 합니다.
차동 설계는 신호 진폭을 두 배로 늘리면서 전력 소비를 줄이고 크로스토크를 최소화하여 우수한 OMA 및 ER 성능을 제공합니다. D-EML은 최적화된 전기 성능을 위한 칩 내 통합 종단 네트워크를 특징으로 하며 저비용 비밀폐 포장 솔루션을 위해 설계되었습니다.
400G D-EML은 제한된 가용성으로 제공될 예정이며, 200G D-EML은 2026년에 일반 출시될 것으로 예상됩니다. 시연은 2025년 4월 1일부터 3일까지 샌프란시스코에서 열리는 OFC 2025의 부스 #1519에서 진행됩니다.
Coherent Corp. (NYSE: COHR) a dévoilé le premier Laser Modulé par Électro-absorption Différentielle (D-EML) de 400 Gb/s de l'industrie lors de l'OFC 2025, faisant progresser le réseau optique haute vitesse pour les centres de données. Cette innovation s'appuie sur leur D-EML de 200G, qui a été reconnu dans les Revues d'Innovation Lightwave+BTR 2025.
La conception différentielle double l'amplitude du signal tout en réduisant la consommation d'énergie et en minimisant le crosstalk, offrant des performances OMA et ER supérieures. Le D-EML dispose d'un réseau de terminaison intégré sur puce pour des performances électriques optimisées et est conçu pour des solutions d'emballage à faible coût et non hermétiques.
Le D-EML de 400G sera disponible sous disponibilité contrôlée, tandis que le D-EML de 200G est prévu pour une sortie générale en 2026. Des démonstrations auront lieu lors de l'OFC 2025 à San Francisco, du 1er au 3 avril au stand #1519.
Coherent Corp. (NYSE: COHR) hat auf der OFC 2025 den ersten 400 Gb/s Differenziellen Elektro-absorptions-Modulierten Laser (D-EML) der Branche vorgestellt und damit das Hochgeschwindigkeits-Optiknetzwerk für Rechenzentren vorangetrieben. Diese Innovation baut auf ihrem erfolgreichen 200G D-EML auf, der in den Innovationsbewertungen von Lightwave+BTR 2025 Anerkennung fand.
Das differenzielle Design verdoppelt die Signalamplitude, während der Stromverbrauch gesenkt und das Übersprechen minimiert wird, was überlegene OMA- und ER-Leistungen bietet. Der D-EML verfügt über ein integriertes Chip-Terminationsnetzwerk für optimierte elektrische Leistung und ist für kostengünstige, nicht hermetische Verpackungslösungen ausgelegt.
Der 400G D-EML wird unter kontrollierter Verfügbarkeit angeboten, während der 200G D-EML voraussichtlich 2026 allgemein erhältlich sein wird. Demonstrationen finden während der OFC 2025 in San Francisco, vom 1. bis 3. April am Stand #1519 statt.
- First-to-market with 400G D-EML technology
- Enhanced performance with doubled signal amplitude and lower power consumption
- Designed for cost-effective non-hermetic packaging
- Recognition for 200G D-EML in 2025 Lightwave+BTR Innovation Reviews
- 200G D-EML general availability delayed until 2026
- 400G D-EML to controlled availability
Insights
Coherent's demonstration of the industry's first 400 Gb/s Differential Electro-absorption Modulated Laser (D-EML) represents a significant technological breakthrough in the optical networking space. This innovation directly addresses the explosive growth in data center infrastructure driven by AI workloads, where power consumption and signal integrity are critical challenges.
The differential design effectively doubles signal amplitude while reducing power consumption compared to traditional single-ended EMLs. This technical advantage positions Coherent favorably against competitors in the race to enable 1.6T and future 3.2T connectivity solutions. The integrated on-chip termination network further enhances performance by reducing signal pre-conditioning requirements.
Coherent is leveraging its vertical integration capabilities - a key strategic advantage in the photonics industry where controlling the full technology stack is increasingly valuable. The collaboration with Ciena for DSP chip supply demonstrates the ecosystem development necessary to commercialize advanced optical technologies.
While the immediate revenue impact will be with the 400G version under controlled availability and the 200G version not reaching general availability until 2026, this announcement reinforces Coherent's technology leadership in high-performance optical components essential for next-generation data centers supporting AI infrastructure.
SAXONBURG, Pa., March 27, 2025 (GLOBE NEWSWIRE) -- Coherent Corp. (NYSE: COHR), a global leader in photonics, is demonstrating the industry's first 400 Gb/s Differential Electro-absorption Modulated Laser (D-EML) at OFC 2025. This represents a significant advance in high-speed optical networking technology for data centers.
Built on the success of its 200G D-EML, which was recognized in the 2025 Lightwave+BTR Innovation Reviews, this innovative D-EML by Coherent addresses critical challenges in optical transceiver designs for 1.6T and future 3.2T connectivity driven by explosive AI infrastructure growth. Unlike traditional single-ended EMLs, its differential design effectively doubles the signal amplitude, significantly lowering overall power consumption while minimizing crosstalk. This enables the differential EML to deliver superior OMA and ER performance. An integrated on-chip termination network further optimizes electrical performance, reducing the need for extensive signal pre-conditioning and enhancing signal integrity. The D-EML builds upon proven EML technology from Coherent and is designed for use in low-cost, non-hermetic packaging solutions.
"This pioneering differential EML design underscores our commitment to innovation and technology leadership," said Dr. Beck Mason, Executive Vice President, Telecommunications at Coherent. "Leveraging our vertical integration capabilities, we continue to empower the data center market’s evolution. We also take this opportunity to thank Ciena for their support in providing a DSP chip to drive this laser for the demonstration.”
The 400G D-EML will be demonstrated at OFC 2025 and supplied under controlled availability upon request, while the 200G D-EML general availability is expected in 2026. Visit booth #1519 at OFC 2025 in San Francisco, April 1-3 to see innovative demonstrations and learn more about the extensive portfolio of optical and semiconductor high-performance solutions from Coherent.
About Coherent
Coherent empowers market innovators to define the future through breakthrough technologies, from materials to systems. We deliver innovations that resonate with our customers in diversified applications for the industrial, communications, electronics, and instrumentation markets. Coherent has research and development, manufacturing, sales, service, and distribution facilities worldwide. For more information, please visit us at coherent.com.
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