PROJECT TITLE :

Absolute Distance Measurement Using Frequency Comb and a Single-Frequency Laser

ABSTRACT:

We have a tendency to propose, here, a multi-heterodyne method using frequency comb and a tunable laser for absolute distance measurement. Varied beat frequency parts will be obtained in RF region. The gap can be determined via the phases of the beat signals. We tend to probably extend the non-ambiguity range up to one zero five m by adjusting the comb repetition frequency slightly. The experimental results show an agreement among 4.5 μm, equivalent to a relative precision of one.five × ten-7 in an exceedingly vary up to thirty m, compared with an incremental distance meter.