The Keysight E1709A is a high-performance remote receiver for precision laser metrology delivering sub-nanometer measurement resolution in demanding industrial environments. This fiber-optic coupled receiver provides 3 to 11 times greater sensitivity than the E1708A, enabling support for additional measurement axes and higher stage velocities. The differential square-wave output captures Doppler-shifted frequency signals with minimal phase processing errors, making it ideal for IC manufacturing, advanced machine tools, and custom stage development.
Technical Specifications
Sensitivity: 0.20 to 0.80 µW with standard 2-meter fiber optic cable, representing a 3 to 11× improvement over the E1708A.
Dynamic Range: 25:1 to 6:1 depending on AC/DC ratio, providing immunity to measurement signal power variations.
Slew Rate: Up to 2 m/s with linear optics (1 m/s with plane mirror optics)—approximately double the E1708A capability.
Bandwidth: More than double the E1708A bandwidth.
Output Signal: Differential square wave at Doppler-shifted frequency, 100 kHz to 7.2 MHz range.
Measurement Error: ±1 LSB across the full frequency range and 25:1 amplitude range, with minimal phase processing errors from frequency variations.
Alignment Tolerance (plastic fiber optic cable): Roll ±3°, Pitch ±1°, Yaw ±1°.
Power: +15 Vdc at 136 mA typical.
Heat Dissipation: 2.0 W typical, 2.7 W maximum.
Operating Temperature: 0–40°C.
Signal Strength Monitor: 0 to 0.8 V output proportional to optical input.
– Key Features
• Remote fiber optic sensing decouples receiver electronics from measurement area
• Standard 2.0 meter fiber optic cable with custom lengths available
• Enhanced sensitivity and bandwidth enable more axes per laser head
• ±1 LSB error performance across full operating range
• Low thermal footprint: 2.0 W typical dissipation
– Typical Applications
IC manufacturing metrology, precision machine tool feedback systems, custom displacement stage control, and laboratory-grade laser displacement measurement.
– Compatibility & Integration
Designed as remote sensing component for laser-based metrology systems. Fiber optic cable transport enables flexible system layouts with receiver mounted away from the measurement environment.
