Quadrature wavelength scanning interferometry
A novel method to double the measurement range of wavelength scanning interferometry (WSI) is described. In WSI the measured optical path difference (OPD) is affected by a sign ambiguity, i.e. from an interference signal it is not possible to distinguish whether the OPD is positive or negative. The...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Published: |
Optical Society of America
2016
|
| Online Access: | https://eprints.nottingham.ac.uk/35132/ |
| _version_ | 1848795009102381056 |
|---|---|
| author | Moschetti, Giuseppe Forbes, Alistair Leach, Richard K. Jiang, Xiang O’Connor, Daniel |
| author_facet | Moschetti, Giuseppe Forbes, Alistair Leach, Richard K. Jiang, Xiang O’Connor, Daniel |
| author_sort | Moschetti, Giuseppe |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | A novel method to double the measurement range of wavelength scanning interferometry (WSI) is described. In WSI the measured optical path difference (OPD) is affected by a sign ambiguity, i.e. from an interference signal it is not possible to distinguish whether the OPD is positive or negative. The sign ambiguity can be resolved by measuring an interference signal in quadrature. A method to obtain a quadrature interference signal for WSI is described and a theoretical analysis of the advantages is reported. Simulations of the advantages of the technique and of signal errors due to non-ideal quadrature are discussed. The analysis and simulation are supported by experimental measurements to show the improved performances. |
| first_indexed | 2025-11-14T19:25:16Z |
| format | Article |
| id | nottingham-35132 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:25:16Z |
| publishDate | 2016 |
| publisher | Optical Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-351322020-05-04T18:03:20Z https://eprints.nottingham.ac.uk/35132/ Quadrature wavelength scanning interferometry Moschetti, Giuseppe Forbes, Alistair Leach, Richard K. Jiang, Xiang O’Connor, Daniel A novel method to double the measurement range of wavelength scanning interferometry (WSI) is described. In WSI the measured optical path difference (OPD) is affected by a sign ambiguity, i.e. from an interference signal it is not possible to distinguish whether the OPD is positive or negative. The sign ambiguity can be resolved by measuring an interference signal in quadrature. A method to obtain a quadrature interference signal for WSI is described and a theoretical analysis of the advantages is reported. Simulations of the advantages of the technique and of signal errors due to non-ideal quadrature are discussed. The analysis and simulation are supported by experimental measurements to show the improved performances. Optical Society of America 2016-07-06 Article PeerReviewed Moschetti, Giuseppe, Forbes, Alistair, Leach, Richard K., Jiang, Xiang and O’Connor, Daniel (2016) Quadrature wavelength scanning interferometry. Applied Optics, 55 (20). pp. 5332-5340. ISSN 2155-3165 https://www.osapublishing.org/ao/abstract.cfm?uri=ao-55-20-5332 doi:10.1364/AO.55.005332 doi:10.1364/AO.55.005332 |
| spellingShingle | Moschetti, Giuseppe Forbes, Alistair Leach, Richard K. Jiang, Xiang O’Connor, Daniel Quadrature wavelength scanning interferometry |
| title | Quadrature wavelength scanning interferometry |
| title_full | Quadrature wavelength scanning interferometry |
| title_fullStr | Quadrature wavelength scanning interferometry |
| title_full_unstemmed | Quadrature wavelength scanning interferometry |
| title_short | Quadrature wavelength scanning interferometry |
| title_sort | quadrature wavelength scanning interferometry |
| url | https://eprints.nottingham.ac.uk/35132/ https://eprints.nottingham.ac.uk/35132/ https://eprints.nottingham.ac.uk/35132/ |