The PD300R silicon photodiode sensor is a general purpose circular geometry laser measurement sensor with a 10 mm aperture and removable filter. Without filter, its spectral range is 350 to 1100 nm and its optical power measuring range is 500 pW to 30 mW. With filter the spectral range is 430 to 1100 nm and the power range is 2 µW to 300 mW.
- 350-1100 nm silicon photodiode sensor with Ø10 mm aperture
- 500 pW to 300 mW power measurement range
- Includes removable filter
- Fiber optic adapters available See All Features
Specifications
- Aperture SizeØ10 mm
- MaterialSilicon
- Spectral RangeFilter in: 430-1100 nm
Filter out: 350-1100 nm - Power RangeFilter in: 2 µW - 300 mW
Filter out: 500 pW - 30 mW - Maximum Average Power DensityFilter in: 50 W/cm²
Filter out: 10 W/cm² - Maximum Pulse EnergyFilter in: 30 µJ
Filter out: 3 µJ
- Response Time0.2 s
- Cable Length1.5 m
- DimensionsØ35 x 24 mm
- CE ComplianceYes
- UKCA ComplianceYes
- China RoHS ComplianceYes
Features
Measuring Very Low Laser Powers with a Photodiode Sensor
In this short “Basics” video, we review in general the use of photodiode sensors for measuring very low laser powers.
Effects of Incidence Angle on Measurements
In this video, you will learn to what degree a beam’s incidence angle matters, and for which sensor types this should be taken into account.
Frequently Asked Questions
- What does the PD300 "Background Subtraction" do?Answer
Ophir's Photodiode PD300 and PD300-1W sensors offer automatic background subtraction so the measurement is not sensitive to room light. With "filter out" (i.e. the external filter removed for low light measurements), 2 separate detector elements are visible. The beam to be measured is incident only on the outer of the 2 detectors, but background light reaches both detectors. The instrument will show the power measured by the outer detector minus that measured by the inner detector.This patented method cancels out 95% - 98% of background light under normal room conditions, even if it is constantly changing.
- Do I need to recalibrate my instrument? How often must it be recalibrated?Answer
Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.
Accessories
Customers that purchase the above items also consider the following items. Ophir-Spiricon meters and sensors include a standard manufacturers warranty for one year. Add a one year Extended Warranty to your meter or sensor, which includes one recalibration.
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![]() | 1G02260Female SM1 to SM1 Adapter | |||||
![]() | 7E01125AOptical Sensor Cable, 5 m Length, Connect PD300 to Power Meter | |||||
![]() | 7E01125BOptical Sensor Cable, 10 m Length, Connect PD300 to Power Meter | |||||
![]() | XWAR-SENSORExtended Warranty for Sensor |
Resources
Data Sheets
Round Photodiode Sensors 20pW to 3W Datasheet(383 kB, PDF)
Catalogs
Power Sensors Catalog(11.2 MB, PDF) Laser Power & Energy Measurement and Laser Beam Analysis Catalog(27.5 MB, PDF)
Drawings & CAD
PD300R Drawing(184.7 kB, PDF)
Videos
Technical Notes
5 Situations Where Laser Performance Measurement is Necessary Effect of Ambient Conditions on Laser Measurements How do I know what range, or scale, to set my power/energy meter to? Measuring Average Power of Pulsed Lasers with Photodiodes(114.5 kB, PDF) How to Properly Select a Laser Power or Energy Sensor
















