Dual-compression socket interconnects provide a compact, solderless interface between the optical engine and system, combining high-speed electrical performance with a detachable architecture. This can help system designers address several critical NPO requirements:

• Serviceability: A solderless interface supports optical-engine or socket replacement without permanently soldering the interface into the system.
• Warpage tolerance and mechanical reliability: Controlled compression, alignment and flatness help accommodate package and board warpage while maintaining consistent electrical contact across high-density interfaces.

• High-speed signal integrity: Low-profile socket architecture, optimized differential-pair layout and grounding help minimize discontinuities and manage crosstalk as data rates increase.
• PCB and substrate signal routing: Coordinated pad/anti-pad design, stack-up and signal layout can help simplify high-speed routing and maintain impedance continuity.
• Cold plate integrated compression hardware design: Integrated compression hardware supports mechanical retention and cold-plate integration within space-constrained NPO architectures.
• Fiber management: Complementary fiber management solutions help organize and route fiber around the optical engines while supporting system assembly and serviceability.

NPO socket design goes beyond selecting a connector. Compression force can scale significantly as contact counts increase, while PCB/substrate flatness, optical-engine alignment and thermal architecture can all influence interconnect performance. Successful implementation therefore requires electrical and mechanical design decisions to be made together. 

TE’s NPO Socket Design Guide provides practical engineering guidance for implementing dual-compression xLGA socket interconnects, including:

• Mechanical performance & reliability
• XY/Z tolerance & alignment
• Signal integrity
• Compression hardware
• Assembly guidelines
• PCB/substrate design 
• Thermal co-design