Datasheet

PWPR-2K-SI
Ultra-Low Noise 2 kHz Photoreceiverwith Si-PIN PhotodiodeThe picture shows model PWPR-2K-SI-FS.
Features

Si-PIN detector, 1.2 mm active diameter
Spectral range 320 - 1060 nm
Ultra-low noise, NEP 9 fW/√√Hz
Bandwidth DC to 2 kHz
910
Transimpedance gain switchable 1.0 x 10 V/A, 1.0 x 10 V/AFree-space input 1.035"-40 threaded, alternatively 25 mm diameter unthreaded
Easily convertible to fiber optic input (FC and FSMA) with optionally available
screw-on adapters
UNC 8-32 and M4 tapped holes for mounting on standard posts with metric andimperial thread

Applications

Spectroscopy, reflection and transmission measurements
Highly sensitive optoelectronic measurements
Applications utilizing optical chopper modulation
Optical front-end for oscilloscopes, A/D converters and lock-in amplifiersSpectral Response

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DE-PWPR-2K-SI_R1/KJ,TH,JM/11OCT2017

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Datasheet

PWPR-2K-SI
Ultra-Low Noise 2 kHz Photoreceiverwith Si-PIN PhotodiodeAvailable Versions

PWPR-2K-SI-FST

1.035"-40 threaded flange for free space applications,compatible with many optical standard accessories andfor use with various types of fiber connector adapters
Optionally available:
Fiber adapters PRA-FC and PRA-FSMA(Coupling efficiency will depend on fiber type.
With the relative large 1.2 mm dia. photodiode installed in
the PWPR-2K-SI input coupling is not critical. However,standard SM or MM fibers (PC or APC) with low numericalaperture (NA) and core diameters not more than 400 µm
are recommended for ensuring near 100% couplingefficiency.)

Available Accessories

PWPR-2K-SI-FS

25 mm dia. unthreaded flange for free space applications,compatible with many optical standard accessories

PWPR-S

Customized versions available on request

PRA-FSMA
PRA-FC

Fiber-adapter with external
1.035"-40 thread

PRA-PAP

Alternative mounting option:
Post adapter plate, easy to mounton FEMTO photoreceiver series OE,
FWPR, PWPR, HCA-S and LCA-S

PS-15-25-L

Power supply
Input: 100 - 240 VAC
Output: ±15 VDC

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Datasheet

PWPR-2K-SI
Ultra-Low Noise 2 kHz Photoreceiverwith Si-PIN PhotodiodeSpecifications

Gain

Test conditions

VS = ±15 V, TA = 25 °C, output load impedance 1 MΩ,warm-up 20 minutes (min. 10 minutes recommended)

Transimpedance gain

1.0 x 10 V/A, 1.0 x 10 V/A (switchable)(@ output load ≥ 100 kΩ)±1 % (electrical)
89
6.4 x 10 V/W, 6.4 x 10 V/W typ. (switchable)(@ 900 nm, output load ≥ 100 kΩ)

Gain accuracy
Conversion gain

910Frequency Response

Lower cut-off frequency
Upper cut-off frequency (–3 dB)
Rise/fall time (10 % - 90 %)DC2 kHz165 µsDetector

Detector type
Active areaSpectral range
Max. sensitivity

Si-PIN photodiode∅ 1.2 mm
320 - 1060 nm
0.64 A/W @ 900 nm typ.

Input

Input offset current (dark current) 0.6 pA typ.
Input offset current drift
factor 2 / 10 °C
Input offset compensation range ±120 pA (adjustable by offset potentiometer)
9Optical saturation power
15.6 nW (@ 10 V/A, 900 nm)
101.56 nW (@ 10 V/A, 900 nm)
NEP
9 fW/√Hz (@ 900 nm, 100 Hz)

OutputOutput voltage range
Max. output current
Output impedance
Output noise–1.2 V … +10 V (@ ≥100 kΩ output load)
30 mA (short-circuit proof)
50 Ω (terminate with ≥100 kΩ)
90.45 mVRMS (3 mVPP) typ. @ 10 V/A, no signal on detector

Power Supply

Supply voltage
Supply current±15 V (±14.5 ... 16.5 V)+32 mA / –25 mA(depends on operating conditions, recommended power
supply capability minimum ±100 mA)

Case

WeightMaterial

207 g (0.46 lbs) PWPR-2K-SI-FS
220 g (0.49 lbs) PWPR-2K-SI-FST incl. coupler ring
AlMg4.5Mn, nickel-plated

Temperature Range

Storage temperature
Operating temperature–30 °C ... +85 °C
0 °C ... +50 °C

Absolute Maximum Ratings

Optical input power (CW)Power supply voltage

10 mW
±20 V

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Datasheet

PWPR-2K-SI
Ultra-Low Noise 2 kHz Photoreceiverwith Si-PIN PhotodiodeTypical Performance
Characteristics

Frequency Response

Output Noise

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Datasheet

PWPR-2K-SI
Ultra-Low Noise 2 kHz Photoreceiverwith Si-PIN PhotodiodeTypical Performance
Characteristics (continued)

Step Signal Response @ 2500 pW (p-p, 850 nm)

acquisition without averaging

acquisition with 64x averaging

Step Signal Response @ 100 pW (p-p, 850 nm)

acquisition without averaging

acquisition with 64x averaging

Step Signal Response @ 10 pW (p-p, 850 nm)

acquisition without averaging

acquisition with 64x averaging

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Datasheet

PWPR-2K-SI
Ultra-Low Noise 2 kHz Photoreceiverwith Si-PIN Photodiode

Connectors

Input

PWPR-2K-SI-FS

25 mm dia. unthreaded flange forfree space applications

PWPR-2K-SI-FST

1.035"-40 threaded flange forfree space applications and foruse with fiber connector adapters
PRA-FC and PRA-FSMA

fixed fiber optic input

available as customized unitOutput

BNC jack (female)Power supply

Lemo series 1S, 3-pin fixed socket(mating plug type: FFA.1S.303.CLAC52)®

Pin 1:Pin 2:Pin 3:

Scope of Delivery+15 V– 15 V
GND®

PWPR-2K-SI, internally threaded coupler ring (‘‘FST’’ version only), Lemo 3-pin connector,
datasheet, transport package

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Datasheet

PWPR-2K-SI
Ultra-Low Noise 2 kHz Photoreceiverwith Si-PIN Photodiode

Dimensions

PWPR-2K-SI-FS (25 mm dia. unthreaded free space input)
8474
4.7
A/W

15150.60.5

Ø 1.2 mm
SI-PIN

0.4
0.30.244510.1

DC - 2 kHz

0200

400

600

800

1000

nm15Gain

Ø 3.2
1.9 mm distance to active area

15

15.9

28.5

12.5

29.5

all measures in mm unless otherwise noted

DZ-PWPR-2K-SI-FS_R0

PWPR-2K-SI-FST (1.035"-40 threaded free space input)
8474
4.8
A/W

15150.60.5

Ø 1.2 mmSI-PIN

0.40.30.144510.2

DC - 2 kHz

0200

400600800

1000

nm15GainØ 3.2
removable
coupler ringwith internal
thread2 mm distance to active area

1515.928.5

1529.5all measures in mm unless otherwise noted

FEMTO Messtechnik GmbHKlosterstr. 6410179 Berlin · Germany
Phone: +49 30 280 4711-0
Fax: +49 30 280 4711-11
Email: info@femto.de
www.femto.de

DZ-PWPR-2K-SI-FST_R0

Specifications are subject to change without notice. Information provided herein is believed to be accurate andreliable. However, no responsibility is assumed by FEMTO Messtechnik GmbH for its use, nor for any infringementof patents or other rights of third parties which may result from its use. No license is granted by implication orotherwise under any patent or patent rights of FEMTO Messtechnik GmbH. Product names mentioned may also be
trademarks used here for identification purposes only.
© by FEMTO Messtechnik GmbH · Printed in Germany

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