The Advantest Q7750 Optical Network Analyzer (ONA) is a high-performance instrument for measuring the amplitude and phase response of optical devices, networks, and subsystems over a broad optical wavelength spectrum. It is designed for laboratory and production environments to support component, subsystem, and link testing in DWDM/CWDM systems.
Key Features & Highlights
Wide wavelength coverage (C-band plus optional L-band)
High spectral resolution and low insertion loss
Simultaneous amplitude and phase measurement
Polarization control / elimination of polarization artifacts
Fast sweep and high stability
Integrated calibration and reference functions
Remote control, scripting, and interface support
Technical Specifications (indicative)
| Parameter | Specification | Notes |
|---|---|---|
| Wavelength coverage | e.g. 1510 nm to 1620 nm (or optional versions) | depending on model |
| Spectral resolution | ~0.01 nm (or better) | for fine measurement of narrowband components |
| Insertion loss | typically < 1 dB | through the ONA itself |
| Dynamic range | > 60 dB | in transmission / reflection modes |
| Phase stability | low drift over sweep | necessary for accurate phase measurement |
| Polarization control | polarization scrambler or controller option | to avoid polarization artifacts |
| Connector type | FC/APC, SC/APC, etc. | depending on user adapter |
| Sweep time | tens to hundreds of ms | depending on span and resolution |
| Control interfaces | GPIB, LAN, SCPI | for integration in test benches |
| Operating environment | 10 to 35 °C | typical lab environment |
| Power supply | 100–240 VAC, 50/60 Hz | universal input |
Use Cases & Applications
Characterization of optical filters, multiplexers, demultiplexers
Testing amplitude and phase responses of optical components (e.g. MEMS filters, AWG devices)
End-to-end testing of DWDM subsystems
Verification of dispersion, group delay, and chromatic dispersion
Quality control in manufacturing of optical modules





















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