Abstract

A novel method to double the measurement range of wavelength scanning interferometery (WSI) is described. In WSI the measured optical path difference (OPD) is affected by a sign ambiguity, that is, 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 nonideal quadrature are discussed. The analysis and simulation are supported by experimental measurements to show the improved performances.

Full Article  |  PDF Article
OSA Recommended Articles
Phase and fringe order determination in wavelength scanning interferometry

Giuseppe Moschetti, Alistair Forbes, Richard K Leach, Xiang Jiang, and Daniel O’Connor
Opt. Express 24(8) 8997-9012 (2016)

Comparison study of algorithms and accuracy in the wavelength scanning interferometry

Hussam Muhamedsalih, Feng Gao, and Xiangqian Jiang
Appl. Opt. 51(36) 8854-8862 (2012)

Improvement of the fringe analysis algorithm for wavelength scanning interferometry based on filter parameter optimization

Tao Zhang, Feng Gao, Hussam Muhamedsalih, Shan Lou, Haydn Martin, and Xiangqian Jiang
Appl. Opt. 57(9) 2227-2234 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (24)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription