Internship: Laboratory Demonstrator for Wavefront Sensorless Adaptive Optics
vor 2 Wochen
**Motivation**
Putting aside completely disruptive phenomena such as rain or fog, atmospheric turbulence influences the power delivered to the terminal and the number of errors in the transmission. Fraunhofer IOSB addresses the problem with advanced adaptive optics (AO) technology. In the AO laboratory in Ettlingen we develop solutions to the most challenging problem of laser propagation over distances longer than ~1 km through strong turbulence near the ground.
**Goals**
Traditional AO systems have three main components: a wavefront sensor, a deformable mirror and a reconstruction computer. Wavefront sensorless AO disposes of the first element and relies on blind optimization algorithms to improve a suitable metric related to the turbulence degradation of the optical system under consideration. The most widely used algorithm in wavefront sensorless AO is the stochastic parallel gradient descent (SPGD). In the project, the student will work on a lab demonstrator to investigate the capabilities of wavefront sensorless AO. Alternatively the student can build a demonstrator based on the newly invented spectral wavefront sensor.
**What you will do**
- You will be supplied with an optical testbed and software (Matlab and LabView) for wavefront sensorless AO. The setup features a spatial light modulator to generate defined, artificial turbulence, and a deformable mirror as a correction device. After getting familiar with the core components of the experiment, you will be tasked to align the setup and close the AO loop.
- You will be asked to integrate a calibration procedure for the deformable mirror in the setup. You will be tasked with the adaptation of the testbed into an operational lab demonstrator. For this purpose, meaningful live experiments should be designed and user-friendly interface should be implemented.**What you bring to the table**
- You have experience with the Matlab, Python or Julia programming language; experience with LabView would be helpful.
- You know the principles of optics and laser physics.
- You have a hands-on mentality and some experience with aligning optical systems.
**What you can expect**
- You work on current scientific questions that are highly relevant to the scientific community.With its focus on developing key technologies that are vital for the future and enabling the commercial utilization of this work by business and industry, Fraunhofer plays a central role in the innovation process. As a pioneer and catalyst for groundbreaking developments and scientific excellence, Fraunhofer helps shape society now and in the future.
**If you have any questions please contact**:
Dr. Szymon Gladysz
Adaptive Optics Group Leader
Fraunhofer Institute of Optronics, System Technologies and Image Exploitation IOSB
Requisition Number: 77676 Application Deadline:
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