Frequency- and spectrally-encoded confocal microscopy

Jaehyun Hwang, Soocheol Kim, Jung Heo, Donghak Lee, Suho Ryu, Chulmin Joo

Research output: Contribution to journalArticle

6 Citations (Scopus)


We describe a three-dimensional microscopy technique based on spectral and frequency encoding. The method employs a wavelength-swept laser to illuminate a specimen with a spectrally-dispersed line focus that sweeps over the specimen in time. The spatial information along each spectral line is further mapped into different modulation frequencies. Spectrally-resolved detection and subsequent Fourier analysis of the backscattered light from the specimen therefore enable high-speed, scanner-free imaging of the specimen with a single-element photodetector. Highcontrast, three-dimensional imaging capability of this method is demonstrated by presenting images of various materials and biological specimens.

Original languageEnglish
Pages (from-to)5809-5821
Number of pages13
JournalOptics Express
Issue number5
Publication statusPublished - 2015 Jan 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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    Hwang, J., Kim, S., Heo, J., Lee, D., Ryu, S., & Joo, C. (2015). Frequency- and spectrally-encoded confocal microscopy. Optics Express, 23(5), 5809-5821.