Quadrant Cell Photoreceivers
Quadrant Cell Photoreceivers
Quadrant-cell photoreceivers are ideal when you need to measure deviations in the position or pointing of your laser beam, such as that required in beam-stabilization systems.
- Ideal for beam-stabilization applications
- Analog output
- Convenient adjustable gain settings and switchable output normalization See All Features
Features
Silicon or InGaAs Sensors
Model 2901 offers silicon sensors which are responsive in the 190-1050 nm wavelength range. Model 2903 uses InGaAs sensors for 900-1700 nm responsivity.
Highly Sensitive Beam Position Measurement
Quadrant-cell photoreceivers consist of four individual yet identical photocells positioned very close to each other (100-µm gaps). To increase the sensitivity of these photoreceivers, each of the cells’ photocurrents is sent to its own individual amplifier before being processed with the other photocell signals to generate top-minus-bottom difference (vertical error) and right-minus-left difference (horizontal error) signals. A sum-of-all-quadrants signal is also provided for normalization purposes.
Battery Operated or External DC Supply
The 2901 and 2903 quadrant-cell photo-receivers can run off batteries or your own DC power supply. To ensure low noise operation, we strongly recommend our Model 0901 power supply.
Using Optical Filters
Bandpass and neutral-density filters for filtering out unwanted light or attenuating the beam can be attached to the front of these photoreceivers with the aid of Newport's 1280 filter holder accessory (sold separately).
Applications
- Shared-beam experiments
- Beam stabilization
- Semiconductor capital equipment
- Defense and aerospace
- Life sciences
Resources
Drawings & CAD
290X-POWER-ON-BACK-2006-Update.pdf(274.4 kB, PDF)
