hancock_2019 ============ S\. W\. Hancock, S\. Zahedpour, A\. Goffin and H\. M\. Milchberg, Optica 6, 1547 \(2019\) `Source record `__ · :doc:`Catalogue ` · :doc:`Review register ` DOI: `10\.1364/optica\.6\.001547 `__ **Source kind:** measurement **Recorded technique:** Linear generation of spatiotemporal optical vortices \(STOVs\) with a cylindrical\-lens 4f pulse shaper and spiral or pi\-step phase masks \(50 fs, 800 nm, 1\.5\-20 uJ\), imaged with transient\-grating single\-shot supercontinuum spectral interferometry \(TG\-SSSI\) in a 500 um fused\-silica witness plate\. **Materials in structured entries:** None recorded. **Dataset quantities:** None recorded. **Contents:** 0 datasets; 0 formulas. Curation notes -------------- This is not the paper requested, which was the measurement of absolute n2 of the air constituents at 2\.5\-11 um by Zahedpour, Hancock and Milchberg\. The library copy is Hancock, Zahedpour, Goffin & Milchberg, 'Free\-space propagation of spatiotemporal optical vortices', Optica 6, 1547 \(2019\) \(first page and DOI checked\)\: a paper on STOVs with no gas nonlinear data\. Its reference list gives the paper the request meant\: ref\. 21, 'S\. Zahedpour, S\. W\. Hancock, and H\. M\. Milchberg, Ultrashort infrared 2\.5\-11 um pulses\: spatiotemporal profiles and absolute nonlinear response of air constituents, Opt\. Lett\. 44, 843\-846 \(2019\)' \(DOI 10\.1364/OL\.44\.000843\), not in the library\. No datasets\. The only nonlinear medium is the fused\-silica witness plate, whose transient\-grating chi\(3\) response is used as a diagnostic without a value; gases are mentioned only through the STOVs of femtosecond filamentation in air \(the delayed rotational response of N2 and O2, ref\. 15, Wahlstrand et al\. 2012\)\. **Recorded bibliographic identity status:** VALIDATED\_WITH\_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents. Datasets -------- No datasets are recorded. Formulas -------- No formulas are recorded. Corrections ----------- No dataset errata are recorded in this source record. Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the :doc:`review register ` for the checks and decisions.