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K: Fachverband Kurzzeit- und angewandte Laserphysik

K 2: Laser Technology and Applications (joint session Q/K)

K 2.4: Vortrag

Montag, 10. März 2025, 11:45–12:00, HS V

Integrated Quantum Dot Comb Laser for Three-dimentional Imaging — •Marjan Shojaei, Stephan Amann, and Nathalie Picque — Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany

Holography is a powerful technique for lensless three-dimensional imaging. It is an interferometric imaging technique that allows to measure phase and amplitude simultaneously. In digital holography, the image acquisition is done with a digital camera sensor, and a computer performs the process of image reconstruction. By using a frequency comb, we do not get a single image as would be the case with a continuous-wave laser, but there are multiple images corresponding to the individual comb lines. This allows to reconstruct the phase over a large unambiguous distance with high accuracy. Here, we assess the potential of quantum dot comb lasers for applications in miniaturized three-dimensional imaging systems. Our quantum-dot comb laser spans over 5nm around the central wavelength of 1310nm with a flat-top spectral distribution and a line spacing of 80 GHz. Due to its large line spacing and turn-key operation, quantum dot lasers are promising comb sources for an application in miniaturized three-dimensional imaging systems and could allow to measure the phase profile of macroscopic objects with interferometric precision.

Keywords: Frequency Comb; Digital Holography; Dimensional Metrology; Integrated Photonics; Interfrometry