JDSU
The JDSU OLS-56 is a portable optical radiation source used for testing fiber optic networks. The JDSU OLS-56 supports single-mode wavelengths of 1310, 1490, 1550, and 1625 nm and multimode wavelengths of 850 and 1300 nm. The JDSU OLS-56 delivers output power from -7 to 0 dBm with an accuracy of 0.3 dB.[1]

The JDSU OLS-56 is a portable optical radiation source. JDSU is a manufacturer of test equipment for fiber optic communications. The OLS-56 is one of a series of portable optical sources offered by JDSU.[1]
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| OLS-55 | — | — | — | tehencom.com[1] |
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The OLS-56 provides output power from -7 to 0 dBm.[1]
The OLS-56 supports radiation modulation at 270 Hz, 1 kHz, and 2 kHz.[1]
The OLS-56 supports single-mode wavelengths of 1310, 1490, 1550, and 1625 nm.[1]
The output power accuracy of the OLS-56 is 0.3 dB.[1]
The following facts about the OLS-56 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 OLS-56 are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the OLS-56 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 OLS-56 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the OLS-56 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the OLS-56 are on record.
Answerable by: an OEM parts catalog or a service engineer
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Last updated Oct 8, 2026.
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