Single-cavity dual-comb lasers: Revolutionizing spectroscopy and ultrafast measurements
Relatore:
Prof. Dr Ursula Keller (ETH Zurich, Switzerland)
Data e ora:
Martedì, 3 Giugno, 2025 - 14:45
Aula:
Sala Conferenze
Abstract:
The optical frequency comb (OFC) revolution began in 1999 and has since driven major innovations. A key advancement is the dual-comb single-cavity laser, which generates two optical combs with slightly different pulse repetition rates. This approach simplifies the system and ensures highly correlated noise properties. We pioneered polarization and spatial multiplexing techniques, enabling practical applications such as spectroscopy, LiDAR, and ultrasonics. This talk will introduce dual-comb lasers and highlight key demonstrations.
Bio:
Ursula Keller, a tenured physics professor at ETH Zurich since 1993, led the NCCR MUST program (2010–2022). With a Diplom (1984) and Ph.D. from Stanford (1989), she started her independent research at Bell Labs (1989–1993). Co-founder of Time-Bandwidth Products and K2 Photonics, she now serves on Jenoptik’s board. Her work in ultrafast lasers, frequency combs, and attosecond experiments has earned top awards, including the Marcel Benoist Prize (2022), International member of the National Academy of Sciences, USA (2021), OSA Frederic Ives Medal (2020), SPIE Gold Medal (2020), IEEE Edison Medal (2019), OSA Charles H. Townes Award (2015), EPS Senior Prize (2011), and two ERC advanced grants (2012 and 2018). Keller has supervised 98 Ph.D. students, authored 528 journal articles, and holds an h-index of 124 with over 57,000 citations.
