Overview
The Newport 818-ST photodetector is a slim-profile, hand-held wand detector designed for precision optical power measurements. Incorporating a large-area 10 mm × 10 mm silicon photodiode, this detector delivers reliable performance across a wide spectral range and is particularly suited for measurements in tight or confined optical setups where space is limited.
Key Features
- Large 10 mm × 10 mm silicon photodiode — high-sensitivity detection for low-power applications
- Spectral response: 400–1100 nm wavelength range
- Built-in OD3 calibrated attenuator — extends dynamic range by up to 3 decades, enabling measurements from picowatts to 2 watts
- BNC interface — compatible with Newport power meters, oscilloscopes, and current meters
- Slim wand profile — ideal for tight or busy optical setups without bulky mounting hardware
- Mounting holes — 8-32 and M4 holes on both sides for versatile optical post mounting
Technical Specifications
- Photodiode Type: Silicon (Si)
- Active Area: 10 mm × 10 mm
- Spectral Range: 400–1100 nm
- Power Measurement Range: Picowatts to 2 watts (with attenuator)
- Attenuator: Built-in calibrated OD3, on/off toggle switch
- Connector: BNC
- Mounting: 8-32 and M4 tapped holes on both sides
- Housing: Metal-cased for durability and optical protection
- Operating Principle: Photodiode with DC and AC measurement capability
Typical Applications
- Laser power measurement and alignment in laboratory and field settings
- Optical power monitoring in fiber optic and free-space systems
- Low-power measurement in UV-to-near-infrared wavelength applications
- Integration with Newport 840-C optical power meters and compatible instruments
- Research and quality assurance in photonics and laser systems
Compatibility & Replacements
Compatible With
- Newport 840-C optical power meter
- Newport power meters with BNC calibration module interface (1830-R-GPIB, 1916R, 1917-R, 1918-R, 1928-C, 1936-R/2936R)
- Laboratory oscilloscopes with BNC input
- Standard current measurement instruments
Replaces / Drop-In Replacement For
The 818-ST has been superseded by the newer 818-ST2 model with enhanced metal housing. The 818-ST is compatible with all legacy Newport optical measurement systems that used the original 818 Series detectors. Verify compatibility with your specific power meter before ordering.
Works With
- Newport optical detector calibration ecosystem
- BNC-based measurement instruments and data acquisition systems
- Laboratory power meters supporting detachable photodiode sensors
- DC and AC optical power measurement modes
