Optical coherence microscopy (OCM) is demonstrated with a high-speed, broadband, reflective-grating phase modulator and a femtosecond Ti:Al<sub>2</sub>O<sub>3</sub> laser. The novel system design permits high-resolution OCM imaging in a new operating regime in which a short coherence gate is used to relax the requirement for high-numerical-aperture confocal axial sectioning. <i>In vivo</i> cellular imaging is demonstrated in the <i>Xenopus laevis</i> tadpole and in human skin with a 3-μm coherence gate and a 30-μm confocal gate. The ability to achieve cellular imaging with a lower numerical aperture should facilitate the development of miniaturized probes for <i>in vivo</i> imaging applications.
© 2003 Optical Society of America
(170.0180) Medical optics and biotechnology : Microscopy
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(180.1790) Microscopy : Confocal microscopy
(320.7160) Ultrafast optics : Ultrafast technology
A. D. Aguirre, P. Hsiung, T. H. Ko, I. Hartl, and J. G. Fujimoto, "High-resolution optical coherence microscopy for high-speed, in vivo cellular imaging," Opt. Lett. 28, 2064-2066 (2003)