918 Series

Low-Power Calibrated Photodetectors

Automatic thermal drift compensation
Free-space and fiber optic measurements
Integrated attenuator allows easy extension of measurement range, selectable from 10X to 1000X
Calibration data electronically stored in detector head
2 m long cable allows easy integration into test systems

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Overview
Specifications
Ordering
Literature & Downloads

The 918 Series Low-Power Detectors are obsolete. Upon depletion of the remaining stock, the products will no longer be available. Since the 918 Series detectors are not compatible with Newport''s current optical power meter models, we encourage the customer to contact Newport technical support at tech@newport.com or 1-800-222-6440 for recommendations for the most suitable replacement power meter and detector pair.

Compatible Power Meters

1930-C and 2930-C (obsolete)

Specifications

Detector Model	918-UV	918-SL	918-IR	918-IG
Wavelength (nm)	200–1100	400–1100	780–1800	800–1650
Power Density, Average Max w/ Attenuator (W/cm²)⁽¹⁾	0.2	2	2	2
Power Density, Average Maximum w/o Attenuator (mW/cm²)⁽¹⁾	0.2	2	3	3
Pulse Energy Density, Maximum - w/ Attenuator (µJ/cm²)⁽²⁾	0.10	1	0.35	0.35
Pulse Energy, Maximum - w/o Attenuator (nJ/cm²)⁽²⁾	0.1	1	0.35	0.35
Calibration Uncertainty⁽⁴⁾	4% @ 200-219nm, 2% @ 220-349nm, 1% @ 350-949nm, 4% @ 950-1100	1% @ 400-940nm, 4% @ 941-1100	2% @ 780-910nm, 2% @ 911-1700nm, 4% @ 1701-1800	2% @ 800-900nm, 2% @ 901-1650
Calibration Uncertainty, w/ Attenuator⁽⁴⁾	8% @ 200-219nm, 2% @ 220-349nm, 1% @ 350-949nm, 4% @ 950-1100 nm	1% @ 400-940nm, 4% @ 941-1100 nm	5% @ 780-910nm, 2% @ 911-1700nm, 4% @ 1701-1800nm	5% @ 800-900nm, 2% @ 901-1650 nm
Uniformity (%)⁽³⁾	±2
Linearity (%)	±0.5
Rise Time (µs)	≤5.9	≤2	≤2	≤2
Shunt Resistance (MΩ) (typ), @-10V	≥10	≥10	≥35 (kΩ)	≥20
Reverse Bias, Maximum (V)	5	3	0.25	2
NEP (pW/√Hz)	0.45	0.2	0.6	0.04
Detector Material	Silicon-UV Enhanced	Silicon	Germanium	Indium Gallium Arsenide
Active Area (cm²)	1		0.071
Active Diameter (cm)	1.13		0.3
Attenuator, OD3	Built-In
Calibration	Stored Internally
Operating Temperature Range	<70% RH 5°C to 50

1) Applies to entire spectral response.
2) 15 ns pulse width.
3) Uniformity specification applies to detector only.
4) Calibration uncertainty can be varied depending on the NIST transfer standard uncertainty variation.

Model	Description	Availability	price raw	Price	Qty. MULTI ADD
918-IG	918 Low-Power Detector, 800–1650 nm, InGaAs, OD3 Attenuator, 14-Pin LEMO	In Stock	1504	$1,504.90	ADD
918-IR	918 Low-Power Detector, 780–1800 nm, Germanium, OD3 Attenuator, 14-Pin LEMO	In Stock	1100	$1,100.90	ADD
918-SL	918 Low-Power Detector, 400–1100 nm, Silicon, OD3 Attenuator, 14-Pin LEMO	In Stock	999	$999.90	ADD
918-UV	918 Low-Power Detector, 200–1100 nm, UV Silicon, OD3 Attenuator, 14-Pin LEMO	In Stock	1201	$1,201.90	ADD

Technical References

Average and Peak Power Calculation Tech Note 1 (31 KB)
Calculating Power Density Tech Note 2 (35 KB)
Fiber Adaptor and Core-IR Installation Tech Note 6 (303 KB)
Min Power Measurement for Power Meter and Detector System Tech Note 6 (110 KB)
Minimum Measurable Power of Power Meter Tech Note 4 RevA (97 KB)

User Manuals

918 Series User Manual (125 KB)