Abstract
Tunable ultrashort pulses in the ultraviolet spectral region are in great demand for a wide range of applications, including spectroscopy and pump–probe experiments. While laser sources capable of producing such pulses exist, they are typically very complex. Notably, resonant dispersive-wave (RDW) emission has emerged as a simple technique for generating such pulses. However, the required pulse energy used to drive the RDW emission, so far, is mostly at the microjoule level, requiring complicated and expensive pump sources. Here, we present our work on lowering the pump energy threshold for generating tuneable deep ultraviolet pulses to the level of tens of nanojoules. We fabricated a record small-core antiresonant fiber with a hollow-core diameter of just 6 µm. When filled with argon, the small mode area enables higher-order soliton propagation and deep ultraviolet (220 to 270 nm) RDW emission from 36 fs pump pulses at 515 nm with the lowest pump energy reported to date (tens of nanojoules). This approach will allow the use of low-cost and compact laser oscillators to drive nonlinear optics in gas-filled fibers for the first time to our knowledge.
Original language | English |
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Pages (from-to) | 3090-3093 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 49 |
Issue number | 11 |
Early online date | 27 May 2024 |
DOIs | |
Publication status | Published - 1 Jun 2024 |
Data Availability Statement
Data underlying the results presented in this paper are not publicly available but may be obtained from the authors upon reasonable request.Funding
Royal Academy of Engineering (RF/202122/21/133); Institution of Engineering and Technology (IET A. F. Harvey Engineering Research Prize); Engineering and Physical Sciences Research Council (EP/T020903/1).
Funders | Funder number |
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Royal Academy Of Engineering | RF/202122/21/133 |
Royal Academy Of Engineering | |
Engineering and Physical Sciences Research Council | EP/T020903/1 |
Engineering and Physical Sciences Research Council |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics