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

	Compare	Description	Compatibility	Drawings, CAD & Specs	Wavelength Range	Maximum Conversion Gain	Responsivity	CW Saturation Power	Avail.	Price
		2901Quadrant Cell Photoreceiver, Silicon, 190-1050 nm, 8-32/M4 Thread	UNIVERSAL		190-1050 nm	10² to 10⁶ V/W	0.5 A/W	30 mW per channel	FREE 2-day shipping on thousands of products on Newport.com Learn More	$1,380
		2903Quadrant Cell Photoreceiver, InGaAs, 900-1700 nm, 8-32/M4 Thread	UNIVERSAL		900-1700 nm	2x10² to 2x10⁶ V/W	1 A/W	15 mW per channel	FREE 2-day shipping on thousands of products on Newport.com Learn More	$2,180

Specifications

Sensor Size
2901: 3 x 3 mm
2903: Ø3 mm
Transimpedance Gain
2x10² to 2x10⁶ V/A
Optical Input
Free Space
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
Bandwidth (-3 dB)
100 kHz (30 Hz for SUM)
Detector Material
2901: Silicon
2903: InGaAs
Rise Time
4 µs

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 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 filter holder accessory (sold separately).

Applications

Shared-beam experiments
Beam stabilization
Semiconductor capital equipment
Defense and aerospace
Life sciences

Accessories

Description	Compatibility	Price
0901Lab Power Supply, ±15 VDC	UNIVERSAL	$570
0923Accessory Cable, Pico (m8) Double-Ended, Male to Male, 1 m	UNIVERSAL	$59
0923-2Accessory Cable, Pico (m8) Double-Ended, Male to Male, 2 m	UNIVERSAL	$69

Resources

Quadrant Cell Photoreceivers

Quadrant Cell Photoreceivers

Specifications

Features

Silicon or InGaAs Sensors

Highly Sensitive Beam Position Measurement

Battery Operated or External DC Supply

Using Optical Filters

Applications

Accessories

Resources

Literature

Manuals

Drawings & CAD

Related Products

CONEX™ Position Sensing Detectors

Filter Holder and Fiber Adapter

Photodetector and Photoreceiver Power Supply