Abstract
We develop a fully fiber based scheme for a near-infrared heterodyne interferometer. Currently, laboratory-based setup and testing is performed, after which we will target bright stars using 20 cm Meade amateur telescopes in flexible baselines. We propose to use this type of transportable interferometer to characterize atmospheric density fluctuations on different scale lengths and times. While the final goal would be to correct out those fluctuations to obtain a flat phase front, the measurement results could be used to probe and refine atmospheric turbulence models.