Agilent/Keysight 81552SM Singlemode Optical Head

The Agilent/Keysight 81552SM is a single-mode optical laser source module centered at 1310 nm, engineered for precise characterization of optical components and systems. This Fabry-Perot laser source integrates with Agilent/Keysight 8153A, 8163A, and 8166 series mainframes to deliver stable, modulated output across research, development, and manufacturing environments.

Technical Specifications

• Source Type: Fabry-Perot Laser


• Central Wavelength: 1310 nm (±20 nm tolerance)


• Spectral Bandwidth: 0 dBm


• Output Attenuation: 0 dB to 6 dB in 0.1 dB increments


• CW Stability (Short Term): ±0.003 dB over 15 minutes at constant temperature


• CW Stability (Long Term): ±0.03 dB over 6 hours at 0°C ± 1 K


• Fiber Type: 9/125 µm single-mode fiber


• Warm-up Time: 20 minutes to optimal performance

Key Features

• Selectable internal digital modulation at 270 Hz and 1 kHz with 50% duty cycle pulse shaping


• Fine output power control via 0.1 dB attenuation steps


• Excellent short- and long-term output stability for demanding measurement applications


• Standard Agilent optical interface for seamless slot integration

Typical Applications

• Optical component characterization


• System-level optical testing


• Single-mode fiber performance validation


• Research and manufacturing test environments

Compatibility & Integration The 81552SM module installs directly into compatible Agilent/Keysight mainframes (8153A, 8163A, 8166) via proprietary interface. Operating temperature range follows mainframe specifications of 0°C to +40°C.