The Keysight N7744C is a four-channel optical power meter for simultaneous measurements across the 1250 nm to 1650 nm wavelength band. It characterizes multi-port optical components and enables parallel testing of single-port devices, delivering high-throughput performance in R&D and manufacturing. The half-rack width, single-rack height form factor optimizes space utilization.
Technical Specifications
Measurement Capabilities
• Channels: 4
• Wavelength range: 1250 nm to 1650 nm
• Sensor type: InGaAs
• Power ranges: +10 dBm to −80 dBm, −60 dBm to +10 dBm, −80 dBm to +10 dBm
• Data acquisition: 1 million samples per second per port
• Minimum averaging time: 1 µs
• Bandwidth: Up to 250 kHz
• Memory: 1 M samples per port plus 1 M sample continuous logging buffer
• Power uncertainty: ±2.5% at reference conditions
• Dynamic range: 65 dB in swept and logging applications; over 80 dB with fast power range switching
• Polarization dependence: <±0.01 dB typical
Connectivity
• Optical ports: 4 channels with snap-on quad-adapter fiber connectivity (N7740 concept)
• Data interfaces: LAN and USB
• Triggering: Hardware trigger with input power threshold detection for transient measurements
– Key Features
• Fast power range switching for stitching measurements across extended dynamic range
• Continuous data logging at 1 M samples/s per port
• Snap-on quad-adapters (N7740BI bare fiber version available) simplify multi-fiber alignment and connection
• One-click zeroing adapter (N7740ZI) for rapid calibration
• No analog output on this model
– Typical Applications
• Multi-port optical component characterization
• Parallel single-port device testing
• Transient power measurements with threshold triggering
• High-throughput manufacturing test
– Compatibility & Integration
The instrument supports SCPI command programming and features a browser-accessible user interface via LAN or USB with no software installation required. Parallel programming over multiple connections enables integration of multiple instruments.
