In addition to precise and fast cw-measurements the relatively large bandwidth from DC to 2 kHz also allows time-resolved and modulated measurements. Particularly the combination with lock-in amplifiers results in ultra-sensitive measurement systems being almost immune to disturbances from external sources. In this way the PWPR-2K can easily detect optical powers from about 100 fW up to 10 nW.
The PWPR-2K photoreceivers are factory equipped with an optical free-space input. There is the choice between a 1.035″-40 threaded flange (FST) and a 25 mm unthreaded flange (FS). Both types offer a broad compatibility with optical standard accessories like tubes, lenses, cage systems and optical adapters from various manufacturers. The threaded free-space input (FST) e.g. can be easily converted to an optical fiber input by screwing the optionally available fiber adapters (PRA-FC and PRA-FSMA) on it.
The relatively large-area detector facilitates optical focusing in free-space applications and ensures a high and stable degree of coupling when using the optionally available fiber optic adapter.
All PWPR-2K photoreceivers feature both UNC 8-32 and M4 tapped holes for mounting on metric and imperial threaded standard posts. The optionally available adapter plate PRA-PAP opens up further mounting options.
PWPR-2K-SI-FS | PWPR-2K-SI-FST |
Mounted in vertical position using the integrated tapped holes |
Mounted in horizontal position using the optionally available post adapter plate |
(PRA-FC, PRA-PAP and post-holder not included in the scope of delivery) |
Models |
PWPR-2K-SI-FST PWPR-2K-SI-FS |
PWPR-2K-IN-FST PWPR-2K-IN-FS |
Photodiode | 1.2 mm Ø Si-PIN | 0.5 mm Ø InGaAs-PIN |
Spectral Range | 320 - 1060 nm | 900 - 1700 nm |
Bandwidth (−3 dB) | DC - 2 kHz | DC - 2 kHz |
Rise/Fall Time (10 % - 90 %) | 165 µs | 165 µs |
Transimpedance Gain (switchable) |
1 x 109 V/A 1 x 1010 V/A |
1 x 109 V/A 1 x 1010 V/A |
Max. Conversion Gain |
0.64 x 109 V/W (@ 900 nm, gain 1010 V/A) |
1.1 x 109 V/W (@ 1580 nm, gain 1010 V/A) |
NEP (@ 100 Hz) | 9 fW/√Hz (@ 900 nm) |
10 fW/√Hz (@ 1580 nm) |
Datasheet | 628 kB | 649 kB |
Output voltage range up to +10 V. Offset adjustable by potentiometer. Output short-circuit protected. Power supply ±15 V via 3-pin Lemo® socket. A mating connector is provided with the device. Optional power supply PS-15 available. For further information please view the datasheet or contact FEMTO.
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FEMTO® Messtechnik GmbH
Klosterstraße 64
10179 Berlin
Germany
Phone: +49-(0)30-280 4711-0
Fax: +49-(0)30-280 4711-11
Email: info@femto.de
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