Yes, it is possible to turn sunlight into a laser beam. This can be achieved using a process called optical parametric amplification (OPA). OPA is a nonlinear optical process in which a high-power laser beam (the pump beam) is used to amplify a weak signal beam (the seed beam). The process involves the interaction of the pump beam and the seed beam in a nonlinear optical material, such as a crystal or a liquid, which causes the energy from the pump beam to be transferred to the seed beam, resulting in the amplification of the seed beam.

In order to turn sunlight into a laser beam, a high-power laser source is required to serve as the pump beam. The sunlight is first collected and focused onto the nonlinear optical material, where it interacts with the pump beam. The amplified light is then filtered and collimated to produce a laser beam.

This process can be used to convert sunlight into a laser beam with a specific wavelength and power, depending on the characteristics of the pump laser and the nonlinear optical material used. However, it's important to note that the efficiency of the conversion process is limited by the laws of thermodynamics, and the output laser power will always be less than the input power from the sunlight.