The Keysight 81949A is a tunable laser source module delivering precise wavelength control across the C and L bands (1520 nm to 1630 nm). This plug-in instrument generates up to +13 dBm output power with ±100 pm absolute wavelength accuracy and mode-hop-free tunability across its full 110 nm range. Built-in coherence control, SBS suppression, and an integrated wavemeter (±20 pm accuracy) enable demanding single-channel and DWDM test applications in telecommunications and optical networking environments.
Technical Specifications
• Wavelength Range: 1520 nm to 1630 nm
• Tuning Range: 110 nm (C + L band)
• Output Power: ≥ +13 dBm (1570 nm to 1620 nm); ≥ +10 dBm (full range); typical peak ≥ +14.5 dBm
• Absolute Wavelength Accuracy: ±100 pm
• Relative Wavelength Accuracy: ±50 pm
• Wavelength Resolution: 5 pm (625 MHz @ 1550 nm)
• Mode-Hop-Free Tunability: Full range
• Tuning Speed: Typical 3 seconds for 100 nm sweep
• Power Linearity: ±0.1 dB
• Power Stability: ±0.03 dB over 24 hours (typical)
• Power Flatness: ±0.2 dB typical (full range); ±0.1 dB (1570 nm to 1620 nm)
• Side-Mode Suppression Ratio (SMSR): ≥ 50 dB (typical)
• Signal-to-Source Spontaneous Emission Ratio: ≥ 48 dB/nm (1570 nm to 1620 nm); typical 60 dB/0.1 nm
• Linewidth: 100 kHz (coherence control off); > 50 MHz (coherence control on, 1570 nm to 1620 nm)
• Wavelength Stability: ±5 pm over 24 hours (typical)
• Built-in Wavemeter Accuracy: ±20 pm absolute
– Key Features
• Coherence control for extended effective linewidth
• Stimulated Brillouin Scattering (SBS) suppression
• Integrated wavemeter for absolute wavelength verification
• BNC front-panel input for external voltage control (±5 V maximum)
• GPIB and front-panel button control interfaces
– Typical Applications
• DWDM system characterization and component testing
• Single-channel optical receiver and transmitter validation
• Wavelength-dependent loss and dispersion measurement
• Fiber optic and optical network research and development
– Compatibility & Integration
Plug-in module compatible with Keysight 8163A/B, 8164A/B, and 8166A/B mainframes.
