Newport
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The Newport 1931-C is an optical power meter capable of measuring low-power light sources from pW to tens of Watts. The 1931-C supports detectors covering 190–1800 nm wavelengths and provides true RMS measurements. The 1931-C can handle repetition rates up to 20 kHz with a sampling rate of 250 kHz.[1][2]
The 1931-C has been applied in scientific research for space-based gravitational reference sensors, where it measured UV LED optical power for charge control of proof masses. More generally, it is used for laser power measurement, fiber-optic testing, LED characterization, and any application requiring calibrated optical power readings from the pW to tens of watts range across the UV to near-infrared spectrum.[2][1]
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| 2931-C | — | — | Dual-channel version of the 1931-C, allowing simultaneous measurements of two light sources | brltest.com[1] |
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The 1931-C can measure optical power from 11 fW to 40 W.[1]
The 1931-C can handle repetition rates up to 20 kHz with a sampling rate of 250 kHz.[1]
Yes, it has a 250,000-point data storage buffer and can store measurements to internal memory or a USB Flash drive.[1]
The following facts about the 1931 C Power Meter are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the 1931 C Power Meter are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the 1931 C Power Meter are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the 1931 C Power Meter are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 1931 C Power Meter is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the 1931 C Power Meter are on record.
Answerable by: an OEM parts catalog or a service engineer
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Last updated Sep 22, 2026.