Agilent/Keysight 8168A,Agilent Keysight 8168A Tunable Laser Source

The Agilent/Keysight 8168A is a tunable laser source engineered for optical component and system characterization across the 1550 nm window. It delivers independent control of wavelength and output power with 0.001 nm resolution, enabling precise heterodyne and coherent measurements. A built-in side mode filter ensures true single-mode operation across the entire tunable range, eliminating multimodal interference and supporting fast, accurate wavelength scans with stable, flat power output.

Technical Specifications

Wavelength Performance

• Tunable range: 1500 nm to 1565 nm


• Wavelength resolution: 0.001 nm


• Wavelength accuracy: ±0.1 nm (typical)


• Wavelength repeatability: ±0.1 nm Output Power


• Output power range: -20.0 dBm to 0.8 dBm


• Power stability: Stable over time and flat across all wavelengths


• Independent control of power and wavelength

Key Features

• Single-mode laser line via integrated side mode filter


• Fast, accurate tuning across the C-band window


• Automated measurement routines for loss, return loss, and coupling ratio determination


• GPIB interface for remote control


• BNC connectors on front panel

Typical Applications

• Heterodyne measurements


• Coherent optical system testing


• Wavelength-dependent component characterization


• Automated loss and return loss measurement

Compatibility & Integration The 8168A integrates with the Agilent/Keysight 816x family of mainframes, including the 8163B, 8164B, and 8166B. Mainframe systems support GPIB, LAN, RS232, and Centronics interfaces via the 816x VXI Plug&Play Driver. Mainframe dimensions: 145 mm H × 426 mm W × 545 mm D; net weight approximately 20 kg.