Why is holography the most interesting application of laser?

In the 20th century, people thought that holography needed strong monochromatic light with good coherence. Obviously, only laser can meet the requirements. Therefore, it was not until 1960 laser appeared that holography became a practical technology. Visible holography is the most interesting application of laser.

196 1 year, Liz and Upatinix of the United States successfully took the first practical off-axis holographic picture with laser. When irradiated with laser reference wave, a clear three-dimensional object image is reproduced. With the success of this practice, in the following year 197 1, their pioneer-Gabriel won the Nobel Prize in physics.