The Agilent/Keysight 10780C is an optical receiver that converts Doppler-shifted laser signals from interferometer and wavelength tracker systems into electrical signals for precision measurement electronics. The receiver focuses laser light onto a silicon PIN photodiode, where polarizing optics separate reference (f1) and measurement (f2 ± M) signal components. These are mixed to generate an AC current at the difference frequency, then converted to a differential square wave output.
Technical Specifications
• Sensitivity: 1.5 µW
• Output Signal: Differential square wave
• Output Frequency Range: 100 kHz to 7.2 MHz
• Power Input: +15 Vdc @ 136 mA
• Power Dissipation: 2.0 W typical, 2.7 W maximum
• Weight: 136 g (4.8 oz)
• Laser Safety: Class II Laser Product, compliant with 21 CFR 1040.10, 1040.11, and international laser safety regulations
– Key Features
• High sensitivity design optimized for individual measurement axes
• Silicon PIN photodiode with integrated signal conditioning
• Compact form factor suitable for OEM integration
• Plastic mounting hardware recommended for electrical isolation and thermal management
• Supplied with snap-on beam target for coarse alignment
– Typical Applications
• Laser interferometer positioning systems
• Multi-axis precision measurement platforms
• Wavelength tracker signal detection
• Doppler displacement measurement
– Compatibility & Integration
The 10780C integrates with Agilent/Keysight laser heads, interferometers, and measurement electronics. Compatible with Agilent 10895A VME Axis Board, Agilent 10885A PC Axis Board, and Agilent N1231A PCI Three-Axis Board. Works with associated Agilent/Keysight cables and optical components to form complete positioning system configurations.
