Photodiodes
Photodiode Sensors convert incident laser photons into carriers (electrons and holes), which are afterwards measured as voltage or current. Being characterized by low noise and high sensitivity, photodiodes are suitable to detect very low light levels, making them ideal for low power measurements of CW lasers. Compared to thermal sensors, photodiodes have a limited spectral range of operation and a low saturation value (1mW/cm2 approximately), so it is often necessary to use attenuating filters when measuring relatively high powers. On the other end, photodiodes are the ideal choice for very low power measurements and when a fast response time is required.
Laser Point’s sensors are calibrated with traceability to NIST and PTB standards and are shipped with a Calibration Certificate. Laser Point’s series of photodiode can measure powers up to 500mW and can cover a wavelength range that extends from UV to the near IR.
They can be provided with DB15 connectivity or with USB and RS-232 connector.
Sensitive detectors for low power measurements
UV enhanced and NIR Detectors (200nm to 1800nm)
Fiber adapters available (SMA,ST, FC,LC,SC)
NIST and PTB (Physikalisch-Technische Bundesanstalt) traceability
POWER MODE
Max. Average Power (1)
40 mW
Min. Power
100 µW
Power Resolution
1 nW
Noise Equivalent Power (NEP) (1)
100 nW
Response Time (0-90%)
0.25 sec
Power Calibration Uncertainty
± 7% @800-1000nm,
±3% @1000-1650nm,
±5% @1650-1800nmDependence on beam postion
± 2%
ABSORBER SPECS
Aperture
9.5 mm
Type
Germanium
Calibration Spectral Range
800 - 1800 nm
Max Power Density
10 W/cm²
GENERAL CHARACTERISTICS
Cooling
Convection
Weight
0.1 Kg
Dimension
Ø 31 x 14 mm
Cable length - connector
1.5 m - DB15
2.5 m – USB (U option)
1.5 m - RS232 (R option)Stand and Post
Light Duty Stand
NOTES
(1). WAVELENGTH DEPENDENT.
商品属性 [波长范围] 800 - 1800 nm [功率范围] 100 µW - 40 mW