Papers Published

1. Changhuei Yang and Wax, A. and Badizadegan, K. and Dasari, R.R. and Feld, M.S., Phase-referenced interferometer with subwavelength and subhertz sensitivity, Opt. Photonics News (USA), vol. 12 no. 12 (2001), pp. 36 - .
   (last updated on 2007/04/14)

   Abstract:
   Summary form only given. The sensitivity of most interferometers is limited by mechanical vibrations. Such fluctuations preclude the measurement of very slow (less than 1 μm/s) and very small (less than 1 μm) movement without elaborate correction and stabilization systems. Yet, many interesting biological phenomena such as subcellular dynamics occur at such time and length scales. We have developed a novel low coherence phase-referenced interferometer (PRI) that can be used to measure slow (~1-1000-nm/s) and small (~5-nm) movements with the objective of studying subcellular dynamics. A motional PRI achieves complete insensitivity to interferometer mechanical jitter by the simultaneous use of two light sources: a CW 775-nm laser and a low coherence light source at 1550 nm. In addition, the use of low coherence light in the interferometer provides depth resolution and, thus, can be used for tomographic imaging

   Keywords:
   biological techniques;cellular biophysics;fluctuations;jitter;light interferometers;light sources;optical images;optical tomography;sensitivity;