The Keysight N7779C is a tunable external cavity laser (ECL) source engineered for precision optical signal generation across multiple wavelength bands. This step-tunable instrument delivers exceptional spectral purity and wavelength stability, making it essential for optical communications testing, fiber characterization, component validation, and R&D applications requiring stable, narrowband optical signals.
Technical Specifications
Wavelength and Output Power
• Wavelength ranges: 1240–1380 nm, 1340–1495 nm, 1450–1650 nm, 1490–1640 nm
• Maximum output power: >+12 dBm (Options 114, 116, 216) or >+13 dBm (Option 113)
• Output power tuning: ≥+11 dBm (1515–1620 nm, 1410–1470 nm, 1290–1340 nm), ≥+5 dBm (full range), ≥+8 dBm (full range)
• Wavelength resolution: 0.1 pm
• Wavelength repeatability: ±3 pm
• Absolute wavelength accuracy: ±10 pm
Tuning and Signal Quality
• Tuning type: Stepped
• Tuning time: 300 ms per 1 nm step
• Spectral linewidth: <10 kHz
• Signal-to-spontaneous emission ratio: ≥75 dB/nm
• Power stability: ±0.01 dB over one hour
• Fine tuning: Automatic motor and piezoelectric actuator coordination with zero overshoot
– Key Features
• Compact form factor: Single rack height unit
• Remote operation via web browser (LAN or USB)
• Optional touch-screen local interface
• Software compatible with Keysight 8160xA and 81600B platforms
• Operates at altitudes to 2000 meters, up to 80% relative humidity (non-condensing)
• Class 1 LED safety per IEC 60825-1:2014
– Typical Applications
• Optical communication system validation
• Fiber optic component testing
• Wavelength-dependent measurements
• Spectroscopic and R&D characterization
– Compatibility & Integration
Standalone operation or integration into existing Keysight optical test systems. Requires grounded AC mains connection.
