The HP/Agilent 81650A is a single Fabry-Perot laser source module delivering 1 mW of stable optical output at 1310 nm. Engineered for precision fiber optic testing and optical component characterization, this module installs directly into compatible Agilent lightwave measurement mainframes and provides exceptional power stability across both short and long measurement intervals.
Technical Specifications
• Laser Type: Fabry-Perot laser diode
• Center Wavelength: 1310 nm
• Output Power: >0 dBm (1 mW nominal)
• CW Power Stability:
– Long term (24 h): ±0.03 dB
– Short term (15 min): <±0.005 dB typical
– With coherence control active: <±0.003 dB typical
• Spectral Width (rms): <3.5 nm
• Output Attenuation: 0 dB to 6 dB adjustable in 0.1 dB steps
• Fiber Output: Single-mode 9/125 µm with straight connectors
• Internal Digital Modulation: 270 Hz, 330 Hz, 1 kHz, 2 kHz, and 200 Hz to 10 kHz free selection; 50% duty cycle pulse-shaped output
• Coherence Control: Improved linewidth broadening capability
• Operating Temperature: 0°C to +45°C
• Warm-up Time: 60 minutes (20 minutes if previously stored at same temperature)
• Dimensions: 75 mm H × 32 mm W × 335 mm D
• Weight: 0.5 kg
– Key Features
• Insensitive to back reflections for stable measurement performance
• Sub-0.005 dB short-term power stability enables repeatable testing
• Adjustable output attenuation in 0.1 dB increments supports variable measurement ranges
• Selectable modulation frequencies from 270 Hz through 10 kHz
• Class I laser safety certification (USA); Class 3A (international)
– Typical Applications
• Optical component insertion loss and return loss characterization
• Fiber optic link performance validation
• Polarization-dependent loss (PDL) measurements
• Laboratory photonics testing requiring narrow spectral width
– Compatibility & Integration
The 81650A module integrates into Agilent 8163A/B, 8164A/B, and 8166A/B mainframe systems. Direct pairing with compatible optical power meter modules enables complete measurement system configuration. Power requirements are supplied by the host mainframe.
