The VIAVI Solutions ETX 500T is a high-speed InGaAs PIN photodiode engineered for optical communication and sensing applications across the near-infrared spectrum. Built with a 500 µm photosensitive area and hermetically sealed in a TO can package, it delivers high responsivity and low noise performance suitable for precision measurement instruments and spectroscopic systems.
Technical Specifications
• Photodiode Type: Large Area InGaAs PIN Photodetector
• Photosensitive Area Diameter: 500 µm (0.5 mm)
• Spectral Responsivity Range: 800 nm to 1700 nm
• Packaging: Hermetically sealed TO can
• Noise Current Density (Photovoltaic Mode): Typically 10 fA/Hz^1/2 at room temperature
• Noise Floor (Reverse-Biased): Typically 60 fA/Hz^1/2 at -5 V
• Dark Current: Low (specifications available in standard and high shunt resistance versions)
• Expected Lifetime: At least 10^7 hours (long-term life-tested)
– Key Features
• Linear spectral responsivity over broad input power range due to low series resistance
• Available in standard and high shunt resistance versions for optimized noise performance
• High sensitivity enabling precise measurements across wide dynamic range
• Greater bandwidth capability when reverse-biased
• Manufactured under strict quality control to MIL-STD 883C, GR468, or custom specifications
• 18-hour burn-in at 125 °C with bias applied per device qualification
– Typical Applications
• Optical power meters
• Optical fiber identifiers
• Optical attenuation test sets
• Near-infrared spectroscopy
• Infrared range finders
• Instrumentation and sensing systems
– Compatibility & Integration
The ETX 500T integrates into standard optical measurement systems with TO-can mounting. Glass window surfaces require cleaning with 99% pure reagent-grade Isopropanol. ESD protection—including grounding straps and anti-static mats—is essential during handling and testing.
