Agilent / Keysight 86140A Standard Performance Optical Spectrum Analyzer

The Agilent/Keysight 86140A is a benchtop optical spectrum analyzer for wavelength measurement and optical component characterization in telecommunications and research environments. It combines high wavelength accuracy, broad spectral coverage, and fast sweep times to support DWDM system analysis, laser diode testing, amplifier evaluation, and passive component validation. The instrument delivers repeatability of ±0.003 nm, dynamic range exceeding 58 dB, and configurable resolution bandwidths from 0.07 nm to 10 nm FWHM.

Technical Specifications

Wavelength Performance

• Range: 600 nm to 1700 nm


• Span: Continuously variable from 0.2 nm to full range; zero span capable


• Accuracy (internal reference, 1510–1570 nm): ±0.025 nm


• Accuracy (internal reference, 1570–1640 nm): ±0.035 nm


• Reproducibility (≤1 min): ±0.003 nm


• Tuning repeatability: ±0.003 nm


• Absolute accuracy (factory calibration, 2-year cycle): ±0.5 nm Resolution & Amplitude


• Resolution bandwidth (FWHM selectable): 0.07, 0.1, 0.2, 0.5, 1, 2, 5, 10 nm


• Dynamic range: >58 dB (at ±0.4 nm from peak wavelength)


• Optical sensitivity: –90 dBm minimum


• Display: Log scale Sweep Performance


• 50 nm span (auto zero off): <180 ms


• 50 nm span (auto zero on): <340 ms


• 100 nm span: <400 ms


• 500 nm span: <650 ms Optical Interface


• Connector options: FC/PC, SC/PC, DIN, ST


• Fiber sizes supported: 9 mm, 50 mm, 62.5 mm


• Maximum input power: +30 dBm total; +12 dBm per channel

Key Features

• Filter mode for selective channel measurement


• Built-in calibration with internal wavelength reference signal


• Multiple user calibration options (±40 nm local or full range)


• Four specialized measurement applications

Built-in Applications

• DWDM Spectral Analysis


• Passive Component Test


• Amplifier Test


• Source Test

Compatibility & Integration Remote operation supported. Front-panel fiber-optic adapters available for flexible optical coupling.