HP Agilent 70952B Opt 122 Optical Spectrum Analyzer OSA DWDM Fiber Module

HP Agilent 70952B Opt 122 Optical Spectrum Analyzer OSA DWDM Fiber Module: High-Resolution Spectral Analysis for Fiber-Optic Systems

The HP Agilent 70952B Opt 122 Optical Spectrum Analyzer OSA DWDM Fiber Module is a modular optical spectrum analyzer built for the HP/Agilent 70000-series MMS mainframe, delivering the wavelength accuracy and dynamic range needed to characterize DWDM systems, EDFA performance, and laser source spectra. It is aimed at telecom engineers, optical component manufacturers, and fiber R&D labs that need detailed spectral measurements across the 600–1700 nm range.

Key Features and Benefits of the HP Agilent 70952B Opt 122 Optical Spectrum Analyzer OSA DWDM Fiber Module

• 600 to 1700 nm wavelength range — Covers visible, O-band, E-band, S-band, C-band, and L-band on one instrument, eliminating the need for band-specific OSAs.
• 0.08 nm resolution bandwidth — Resolves closely spaced DWDM channels and reveals fine spectral structure on modulated carriers.
• Greater than 60 dB dynamic range — Reveals low-level sidemodes and ASE noise adjacent to strong carriers without saturation artifacts.
• Option 122 single-mode fiber input — Optimized for telecom single-mode fiber, giving repeatable coupling and stable absolute power readings.
• Modular MMS architecture — Slots into HP 70001A mainframes alongside other 70000-series modules to build a custom test bench.
• ±0.1 nm wavelength accuracy — Reliable enough to verify ITU channel placement and identify drift in DFB and tunable laser sources.
• HP-IB (GPIB) remote control — Drives cleanly from legacy and modern automated test executives for production and characterization use.
• Built-in trace math and markers — Peak search, delta markers, and channel power tables speed up routine measurements without external post-processing.

Advanced Capabilities

The 70952B uses a diffraction-grating monochromator with a double-pass optical design, which is what enables its high dynamic range without sacrificing speed. This matters when measuring EDFA output: the gain peak and the noise floor can be separated by 50 dB or more, and a single-pass OSA will smear the two together. The double-pass architecture cleanly separates signal from ASE, making OSNR measurements meaningful rather than estimated.

As a modular instrument, the 70952B is also valuable for engineers who want to mix and match. Combined with other 70000-series modules in an MMS mainframe — RF spectrum analyzers, sources, or power meters — it becomes part of an integrated optical-RF test platform that can characterize a complete transmitter or receiver chain from a single rack. For groups maintaining long-running HP 70000-series setups, the 70952B is a direct fit rather than a forced upgrade to an entirely new platform.

Calibration and Quality Assurance

Every HP Agilent 70952B Opt 122 is calibrated prior to shipping to OEM specifications. The order includes a Calibration Certificate, Calibration Label, and full Calibration Data. This means the instrument arrives traceable, audit-ready, and ready to use straight out of the box — no need to schedule a calibration cycle before putting it into service.

Specifications