The HP/Agilent 11891A is a multimode fiber (MMF) lightwave coupler that splits or combines optical signals in test and measurement applications. Operating at a nominal 3 dB coupling ratio, it divides an incoming signal into two equal 50% paths or combines two signals into one, making it ideal for optical communication system characterization. The device pairs with the single-mode 11890A coupler and is engineered for field durability and protection in demanding test environments.
Technical Specifications
• Product Type: Lightwave Coupler
• Fiber Type: Multimode Fiber (MMF)
• Coupling Ratio: 3 dB nominal (50% coupling)
• Connector Standard: HMS-10/HP optical connectors
• Connector Adapters: Available for interfacing with alternate optical connector standards
– Key Features
• Dual optical ports for signal splitting and combining operations
• Rugged construction with enhanced protection during operation and handling
• Port design accommodates HMS-10/HP connectors with optional adapter support
• Dual-path signal distribution maintains equal power distribution
– Typical Applications
• Optical signal splitting and combining in fiber optic systems
• Test and measurement in optical communication networks
• Integration with HP Lightwave Component Analyzers for performance evaluation
• Field deployment in optical system characterization and diagnostics
– Compatibility & Integration
Designed primarily for use with HP Lightwave Component Analyzers, the 11891A integrates readily with compatible test equipment such as the HP 8702A/E Lightwave Component Analyzer. The device accepts HMS-10/HP connectors, with adapter options available for non-standard port types. Maintenance requires non-corrosive alcohol or liquid freon with lint-free materials; compressed air drying is acceptable. Fiber end-face cleaning follows standard procedures with dedicated optical cleaning kits such as the HP 15475A.
