PDP90A Position Sensing Detector User Guide, is a two-dimensional, tetra-lateral position sensing detector that provides X and Y-axis positional information.
The PDP90A is a two-dimensional, tetra-lateral position sensing detector designed for precise alignment and position measurements. It works with Thorlabs’ TPA101 T-Cube Auto-Aligner and supports spot sizes up to 9 mm in diameter. Setup involves mounting the sensor, connecting it to the controller, and adjusting beam intensity to ensure optimal signal-to-noise ratio. The sensor provides X and Y-axis positional data via four electrodes and includes circuitry to decode position signals.
Technical specifications include a wavelength range of 320–1100 nm, peak responsivity of 0.6 A/W at 960 nm, and a maximum photocurrent of 40 µA. The sensor operates within a temperature range of 10–40°C and is designed for applications requiring precise alignment, such as microscope focusing and fiber launch systems.
| Wavelength Range | 320 – 1100 nm |
|---|---|
| Peak Responsivity | 0.6 A/W at 960 nm |
| Photocurrent (Max) | 40 µA |
| Output Voltage Range | 0 to 4 V |
| Spot Size | Ø0.2 to Ø7 mm (Recommended), Ø9 mm (Max) |
| Operating Temperature | 10 to 40 °C |
| Sensor Size | 9 mm x 9 mm |
| Mechanical Aperture | Ø0.50” (Ø12.7 mm) |
| Weight | 0.25 lbs. (114 g) |
The maximum spot size is Ø9 mm, though a spot between Ø0.2 mm and Ø7 mm is recommended for best results.
The position resolution is 0.75 µm when the SUM output voltage is set to 4 V.
The maximum photocurrent is 40 µA.
The operating temperature range is 10 to 40 °C.