The Agilent/Keysight N7714A is a four-port tunable laser source engineered for optical testing and research across C-band and L-band wavelengths. The instrument delivers sub-100 kHz linewidth, offset-grid tuning, and flexible grid spacing (100 GHz, 50 GHz, 25 GHz, and arbitrary configurations) for coherent mixing and complex modulation format validation. With frequency resolution of 100 MHz (0.8 pm at 1550 nm), absolute wavelength accuracy of ± 22 pm (± 2.5 GHz), and output power to +15 dBm, it addresses demanding DWDM characterization and system integration workflows. Optional C-band/L-band or dual-band configurations support varied spectral requirements. Fine-tuning across ± 6 GHz in 15 seconds without output interruption enables rapid wavelength adjustment during live testing.
Technical Specifications
• Wavelength Range: C-band 1527.60–1570.01 nm (196.25–190.95 THz); L-band 1570.01–1611.76 nm (190.95–186.35 THz); dual-band and four-C-band options available
• Frequency Resolution: 100 MHz (0.8 pm at 1550 nm)
• Absolute Wavelength Accuracy: ± 22 pm (± 2.5 GHz)
• Relative Wavelength Accuracy: ± 12 pm (± 1.5 GHz)
• Wavelength Repeatability: ± 2.5 pm (± 0.3 GHz) typical
• Wavelength Stability: ± 2.5 pm (± 0.3 GHz) over 24 hours; ± 0.5 pm over 1 minute typical
• Maximum Output Power: +15 dBm typical; ≥ +13.5 dBm guaranteed
• Power Adjustment Range: 8 dB
• Power Setting Resolution: 0.1 dB
• Power Flatness: ± 0.2 dB (full wavelength range) typical
• Linewidth: < 100 kHz
• Side Mode Suppression Ratio: 50 dB typical
• Relative Intensity Noise: –145 dB/Hz (10 MHz–40 GHz) typical
• Fine Tuning Range: ± 6 GHz typical; 12 GHz total span
• Fine Tuning Speed: 15 seconds (–6 GHz to +6 GHz)
• Connector: FC/APC or FC/PC options
• Fiber: 9/125 µm panda PMF, TE mode
• Polarization Extinction Ratio: 16 dB typical
• Warm-up Time: 1 hour for full specification compliance
– Key Features
• Arbitrary grid and offset-grid tuning for non-standard channel spacing
• SBS suppression with FM dither (20.8 kHz) and 0–1 GHz modulation range
• 30 dB output isolation typical
• Residual shutter-closed power ≤ –45 dBm
• 1 MHz fine-tuning resolution
– Typical Applications
• DWDM system validation and channel characterization
• Coherent receiver and modulation format testing
• Optical filter and component measurement
• Research in advanced modulation and signal processing
