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

The Agilent/Keysight 8168D Tunable Laser Source delivers precision wavelength control across the S+C bands for optical component characterization and WDM system testing. Independent adjustment of output power and wavelength enables stable power delivery during wavelength scans, critical for component validation and photonic experiments. A built-in sidemode filter ensures true single-mode operation with linewidth as narrow as 100 kHz, supporting both coherent and incoherent measurement scenarios.

Technical Specifications

• Wavelength Range: 1490 nm to 1565 nm (S+C bands)


• Wavelength Accuracy: ±0.2 nm (absolute); ±0.01 nm (relative)


• Wavelength Resolution: 0.001 nm


• Wavelength Stability: -3 dBm)


• Power Stability: ±0.03 dB


• Linewidth: 100 kHz (typical, coherent control OFF); 30–500 MHz (typical, coherent control ON)


• Sidemode Filter: Built-in for single-mode operation


• Fiber Output: 9/125 µm SMF

Key Features

• Independent power and wavelength control eliminates output fluctuations during scans


• Internal modulation: 250 Hz to 300 kHz squarewave, 100% depth capability


• External modulation: 200 kHz to 20 MHz bandwidth, ±15% maximum depth


• Three fiber connector options: straight contact, angled contact, and angled non-contact (Diamond HMS-10/HP/HRL)


• Coherent control mode reduces interference ripple through effective linewidth broadening to 500 MHz


• 0.001 nm wavelength resolution supports dense WDM component testing

Typical Applications

• Dense wavelength division multiplexing (DWDM) component design validation


• Optical filter and component spectral characterization


• Loss, return loss, and coupling ratio measurements


• Integration into automated production test environments

Compatibility & Integration Designed for production test automation with built-in application software supporting manual loss, return loss, and coupling ratio measurements. Compatible with HP 8153A Lightwave Multimeter for dual-channel measurement configurations. Power requirement: 100–240 Vrms ±10%, 260 VA maximum.