MKS Inc.

The 2901 Quadrant Cell Photoreceivers is ideal when you need to measure small deviations in the position of your 190 to 1050 nm laser beam, such as that required in beam stabilization systems. Quadrant-cell photoreceivers consist of four individual yet identical photocells positioned very close to each other. 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 left-minus-right difference (horizontal error) signals. A sum-of-all-quadrants signal is also provided for normalization purposes. These photoreceivers can operate off batteries, your own DC power supply or our Model 0901 power supply. 8-32 mounting thread. M4 metric adaptor and tool now included.

Specifications

Technical Specs

Wavelength Range
190-1050 nm
Sensor Size
3 x 3 mm
Maximum Conversion Gain
10² to 10⁶ V/W
Transimpedance Gain
2x10² to 2x10⁶ V/A
Optical Input
Free Space
CW Saturation Power
30 mW per channel
Analog Output
X, Y, SUM
Analog Output Voltage Range
X & Y: ±2.5 V
SUM: 0 to +2.5 V
Connector, Analog Output
Male BNC

Analog Output Impediance
1 kΩ
Power Requirements
±15 V, 50 mA power supply or 9V Battery
Responsivity
0.5 A/W
Bandwidth (-3 dB)
100 kHz (30 Hz for SUM)
Detector Material
Si quad-cell with 100 µm gap
Rise Time
4 µs

Wavelength Range
190-1050 nm
Sensor Size
3 x 3 mm
Maximum Conversion Gain
10² to 10⁶ V/W
Transimpedance Gain
2x10² to 2x10⁶ V/A
Optical Input
Free Space
CW Saturation Power
30 mW per channel
Analog Output
X, Y, SUM
Analog Output Voltage Range
X & Y: ±2.5 V
SUM: 0 to +2.5 V
Connector, Analog Output
Male BNC

Analog Output Impediance
1 kΩ
Power Requirements
±15 V, 50 mA power supply or 9V Battery
Responsivity
0.5 A/W
Bandwidth (-3 dB)
100 kHz (30 Hz for SUM)
Detector Material
Si quad-cell with 100 µm gap
Rise Time
4 µs

Resources & Downloads

Other

RoHS Declaration Quad Cells.pdf(231.3 kB, PDF)

Manuals

90099915 Quadcell Photoreceivers User Manual Rev A.pdf(1.5 MB, PDF)

3D Product Models

Drawings & CAD

290X-POWER-ON-BACK-2006-Update.pdf(274.4 kB, PDF)

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