Agilent / Keysight 81989A 1465-1575nm Tunable Laser Source

The Keysight 81989A is a high-performance tunable laser source engineered for optical testing across the 1465 nm to 1575 nm wavelength range. This single-slot plug-in module delivers precise wavelength control and exceptional optical performance for characterizing optical amplifiers, active components, and broadband passive optical components. The 81989A supports DWDM system simulation and nonlinear effect investigation in optical fibers and transmission links, operating within the S+C transmission band with 110 nm total wavelength coverage.

– Technical Specifications

• Wavelength Range: 1465 nm to 1575 nm (110 nm total coverage)
• Output Power: Up to +13 dBm CW; > +14.5 dBm peak (typical); > +13 dBm from 1525 nm to 1575 nm; > +10 dBm across full range
• Wavelength Accuracy: ±20 pm with built-in wavemeter; ±100 pm absolute
• Wavelength Resolution: 5 pm (625 MHz at 1550 nm); 1 pm option available (125 MHz at 1550 nm)
• Mode-Hop Free Tuning: Full wavelength range with typical 3-second tuning time for 100 nm
• Side-Mode Suppression Ratio: ≥ 50 dB (typical)
• Linewidth (Coherence Control On): > 50 MHz effective (typical)
• Signal-to-Source Spontaneous Emission Ratio: ≥ 45 dB/nm at +10 dBm (typical)
• Relative Intensity Noise: -145 dB/Hz from 0.1 GHz to 6 GHz (typical)
• Power Stability: 0.01 dB
• Extinction Ratio (Panda Fiber Option 071): 16 dB (typical)
• External Voltage Input: One BNC connector accepting ±6 V maximum
• Operating Temperature: 10 °C to 35 °C
• Storage Temperature: -40 °C to +70 °C
• Physical Dimensions: 75 mm × 32 mm × 335 mm
• Weight: 0.95 kg

– Key Features

• Built-in wavemeter for precise wavelength accuracy
• Coherence control and SBS suppression integrated
• Internal modulation capability
• Panda polarization-maintaining fiber option with TE mode orientation
• Class 1M laser classification per IEC 60825-1

– Typical Applications

• DWDM system characterization and simulation
• Optical amplifier testing
• Active and passive optical component evaluation
• Nonlinear fiber effect investigation
• Single-channel and multi-channel test scenarios

– Compatibility & Integration

The 81989A installs as a single-slot module in Keysight 8163A/B, 8164A/B, and 8166A/B lightwave mainframes. One Agilent 81000xI-series connector interface is required (not included).