Advantest Q82208 800nm-1700nm Optical Sensor Head

The Advantest Q82208 is an optical sensor head engineered for precision measurements across the 800 nm to 1700 nm wavelength band. Built around a cooled InGaAs photodiode, it delivers measurement sensitivity down to −94 dBm and supports linear operation to +10 dBm, making it suitable for both weak-signal and high-power optical characterization. The sensor head minimizes return loss through slant-polished fiber ends (≥50 dB) and optional high-return-loss adapters (≥45 dB with PC-polished connectors), enabling accurate measurements in dispersion-shifted fiber systems.

Technical Specifications

• Wavelength Range: 800 nm to 1700 nm


• Sensor Element: Cooled InGaAs photodiode


• Measurement Sensitivity: −94 dBm (minimum)


• Maximum Measurable Power: +10 dBm with high linearity


• Return Loss: 50 dB or greater (slant-polished fibers); 45 dB or greater (PC-polished connectors with high-return-loss adapter)


• Fiber Compatibility: Core diameter ≤10 µm, numerical aperture ≤0.19


• Sampling Rate: 100 times per second maximum


• Ranging Speed: 20 msec minimum to 500 msec maximum


• Measurement Modes: CW (continuous optical measurement), chopped light (270 Hz, 2 kHz, 4 kHz)

Key Features

• Supports FC, SC, ST, MU, LC, and plug-in connector types


• Optional 1550 nm calibration (OPT. 25)


• Horizontal operation required; minimum 10 cm ventilation clearance around air vents


• Horizontal storage position; vertical storage requires securing to prevent drops

Typical Applications Optical power measurement in fiber optic systems, dispersion-shifted fiber characterization, and wavelength-dependent power assessment in the near-infrared spectrum.

Compatibility & Integration The Q82208 integrates with compatible Advantest optical power meter main units such as the Q8221. Host systems may support GPIB data transfer.