The Agilent/Keysight 81554SM is a dual-wavelength Fabry-Perot laser source module engineered for precision optical testing across telecommunications and data communications networks. Operating at 1310 nm and 1550 nm with single-mode fiber output, this module delivers stable, back-reflection-insensitive performance in a compact form factor designed for integration into Agilent/Keysight lightwave multimeter mainframes.
Technical Specifications
Wavelengths & Output
• Dual wavelengths: 1310 nm ± 20 nm and 1550 nm ± 20 nm
• Single-mode fiber: 9/125 µm
• Output power: Greater than -1 dBm (typical range -1.2 dBm to +1.47 dBm across wavelengths)
• Spectral bandwidth: Less than 2.5/4 nm rms
• Output attenuation: 0 dB to 6 dB, adjustable in 0.1 dB steps
Modulation & Timing
• Internal digital modulation frequencies: 270 Hz, 1 kHz, 2 kHz (selectable)
• Pulse-shaped outputs with 50% duty cycle
Stability & Warm-up
• High long- and short-term stability with 20-minute recommended warm-up time
• Long-term CW stability doubles after one minute of laser operation
Analog Output
• Bandwidth: DC to <300–1000 Hz (dependent on range and optical head)
• Output voltage: 0–2 V into open circuit
• Output impedance: 600 Ω typical
• Maximum input voltage: ± 10 V
Physical & Environmental
• Dimensions: 75 mm H × 32 mm W × 335 mm D (2.8" × 1.3" × 13.2")
• Net weight: 0.7 kg (1.5 lbs)
• Operating temperature: 0 °C to +55 °C (subject to host mainframe limits)
• Storage/shipment temperature: +40 °C to +70 °C
– Key Features
• Fabry-Perot laser design provides inherent insensitivity to back reflections
• PC-type optical interface with precision connectors
• Fine-resolution attenuation control in 0.1 dB increments
• Selectable modulation frequencies for flexible test configurations
• Rapid stability improvement—long-term performance stabilizes within one minute of operation
– Compatibility & Integration
Compatible with Agilent/Keysight 8153A, 8163A, and 8166 series Lightwave Multimeters. Optical connectors and adapters are supplied or available separately.
