Digital holography free of 2π ambiguity, using coherence modulation

Sungbin Jeon, Janghyun Cho, Liangcai Cao, No Cheol Park

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In this Letter, a quantitative measurement method with an extended axial range in low-coherence light digital holography is presented. Based on the characteristics of the light source, the degree of coherence and phase values are obtained. Because the degree of coherence is modulated with respect to the optical path difference, it can be used to remove the 2π ambiguity of the phase, without the use of numerical or dual-wavelength methods. The mathematical procedures from three phase-shifting holograms are numerically described. From experimental results, the accurate measurements of a sample with high step are presented to confirm the effectiveness.

Original languageEnglish
Pages (from-to)4626-4629
Number of pages4
JournalOptics Letters
Issue number19
Publication statusPublished - 2019 Oct 1

Bibliographical note

Funding Information:
National Research Foundation of Korea (2019R1A2C1004687).

Publisher Copyright:
© 2019 Optical Society of America

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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