Abstract: The development of frequency combs has significant impact on a number of areas in optics including precision measurement and spectroscopy. However, the further adoption of comb based techniques, particularly in spectroscopy, has been hindered by the lack of a compact, efficient and inexpensive comb generator, in particular a chip-scale device. I will present our work on designing, fabricating and characterizing diode lasers that directly generate frequency combs. These devices meet the above criteria. We demonstrate the use of them in dual comb spectroscopy.

References:
1. M. W. Day, M. Dong, B. C. Smith, R. C. Owen, G. C. Kerber, T. Ma, H. G. Winful, and S. T. Cundiff, “Simple single-section diode frequency combs,” APL Photonics 5(12), 121303 (2020).
2. M. Dong, M. W. Day, H. G. Winful, and S. T. Cundiff, “Quantum-well laser diodes for frequency comb spectroscopy,” Opt. Express 28(15), 21825 (2020).
3. M. Dong, S. T. Cundiff, and H. G. Winful, “Physics of frequency-modulated comb generation in quantum-well diode lasers,” Phys. Rev. A 97(5), 53822 (2018).