Agilent / Keysight N7714A Four-Port Tunable Laser System Source

The Keysight N7714A is a four-port tunable laser system source engineered for optical testing and measurement. It delivers precise wavelength control, exceptional frequency stability, and flexible grid options across C-band or L-band configurations. The instrument supports gridless tuning, ITU-T standard grids (100 GHz, 50 GHz, 25 GHz), and arbitrary wavelength grids with offset-grid tuning capability greater than ±6 GHz.

A 12 GHz fine-tuning range permits frequency adjustment without output interruption. With typical linewidth under 100 kHz, absolute wavelength accuracy of ±22 pm (±2.5 GHz), and wavelength stability of ±2.5 pm (±0.3 GHz) over 24 hours, the N7714A suits advanced research, system development, and realistic optical transmission loading. Its compact 1U half-width form factor (43 mm × 212 mm × 372 mm, 3.8 kg) enables high-density test configurations.

Technical Specifications

• Maximum output power: ≥ +15 dBm typical


• Power adjustment range: 8 dB


• Power stability: ±0.03 dB over 24 hours; ±0.03 dB over 1 hour


• Power flatness: ±0.2 dB across full wavelength range


• Power repeatability: ±0.08 dB


• Residual output power (shutter closed): ≤ –45 dBm


• Fine tuning resolution: 1 MHz typical


• Tuning time: < 30 seconds typical Spectral Quality


• Side mode suppression ratio (SMSR): 50 dB typical


• Source spontaneous emission (SSE): 50 dB/nm; 60 dB/0.1 nm


• Relative intensity noise (RIN): –145 dB/Hz (10 MHz to 40 GHz)


• Polarization extinction ratio: 16 dB typical


• Output isolation: 30 dB typical Wavelength Performance


• Absolute accuracy: ±22 pm (±2.5 GHz)


• Relative accuracy: ±12 pm (±1.5 GHz)


• Repeatability: ±2.5 pm (±0.3 GHz)


• Stability over 1 minute: ±0.5 pm Physical & Environmental


• Form factor: 1U rack height, ½ 19-inch width


• Warm-up time: 1 hour for full specification


• Fiber type: 9/125 µm Panda polarization-maintaining

Key Features

• Four independent optical ports


• C-band or L-band options with seamless wavelength coverage


• SBS suppression with FM p-p modulation (0 to 1 GHz) at 20.8 kHz dither frequency


• Immediate operation after boot-up

Typical Applications

• Optical transmission system characterization and validation


• Multi-wavelength testing and measurement


• Research and development in fiber-optic systems


• System integration requiring multiple independent laser sources

Compatibility & Integration Compact footprint and multiple ports support high-density test rack configurations. Polarization-maintaining fiber outputs enable integration with systems requiring controlled polarization states.