Scan-less confocal phase microscopy based on dual comb spectroscopy of two-dimensional-image-encoding optical frequency comb
Abstract
Confocal imaging and phase imaging are powerful tools in life science research and industrial inspection. To coherently link the two techniques with different depth resolutions, we introduce an optical frequency comb (OFC) to microscopy. Two-dimensional (2D) image pixels of a sample were encoded onto OFC modes via 2D spectral encoding, in which OFC acted as an optical carrier with a vast number of discrete frequency channels. Then, a scan-less full-field confocal image with a depth resolution of 62.4 um was decoded from a mode-resolved OFC amplitude spectrum obtained by dual-comb spectroscopy. Furthermore, a phase image with a depth resolution of 13.7 nm was decoded from a mode-resolved OFC phase spectrum under the above confocality. The phase wrapping ambiguity can be removed by the match between the confocal depth resolution and the phase wrapping period. The proposed hybrid microscopy approach will be a powerful tool for a variety of applications.
Cite
@article{arxiv.1705.07236,
title = {Scan-less confocal phase microscopy based on dual comb spectroscopy of two-dimensional-image-encoding optical frequency comb},
author = {Eiji Hase and Takeo Minamikawa and Shuji Miyamoto and Ryuji Ichikawa and Yi-Da Hsieh and Kyuki Shibuya and Yoshiaki Nakajima and Akifumi Asahara and Kaoru Minoshima and Yasuhiro Mizutani and Tetsuo Iwata and Hirotsugu Yamamoto and Takeshi Yasui},
journal= {arXiv preprint arXiv:1705.07236},
year = {2018}
}
Comments
32 page, 6 figures