Phase-matched extreme-ultraviolet frequency-comb generation
(2019) Ultrafast Optics XII 2019 In Proceedings of SPIE - The International Society for Optical Engineering 11370. p.94-95- Abstract
Extreme ultraviolet (XUV) laser radiation is commonly produced via high-harmonic generation (HHG) in gases. The lasers that drive this process typically operate at low pulse repetition rates (<100 kHz). Under these operating conditions, the plasma generated by each laser pulse clears the generation volume before the next pulse arrives. Therefore, each laser pulse interacts with fresh plasma-free gas, where phase-matching facilitates efficient HHG. However, applications requiring high counting statistics or frequency-comb precision make high repetition rates (>10 MHz) necessary. Unfortunately, at high repetition rates, plasma accumulates in the XUV generation region and prevents phase-matching, resulting in low HHG efficiency. We... (More)
Extreme ultraviolet (XUV) laser radiation is commonly produced via high-harmonic generation (HHG) in gases. The lasers that drive this process typically operate at low pulse repetition rates (<100 kHz). Under these operating conditions, the plasma generated by each laser pulse clears the generation volume before the next pulse arrives. Therefore, each laser pulse interacts with fresh plasma-free gas, where phase-matching facilitates efficient HHG. However, applications requiring high counting statistics or frequency-comb precision make high repetition rates (>10 MHz) necessary. Unfortunately, at high repetition rates, plasma accumulates in the XUV generation region and prevents phase-matching, resulting in low HHG efficiency. We use high-temperature gas mixtures to increase the gas translational velocity, thus reduce plasma accumulation and facilitate phase-matching. We experimentally achieve phase-matched HHG at a repetition rate of 77 MHz, generating record power of ~2 mW at 97 nm and ~0.9 mW at 67 nm.
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- author
- Porat, G. ; Heyl, C. M. LU ; Schoun, S. B. ; Benko, C. ; Dörre, N. ; Corwin, K. L. and Ye, J.
- organization
- publishing date
- 2019
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Extreme ultraviolet frequency comb, High harmonic generation, Nonlinear optics, Ultrafast optics
- host publication
- Ultrafast Optics XII
- series title
- Proceedings of SPIE - The International Society for Optical Engineering
- editor
- Jovanovic, Igor ; Resan, Bojan ; Osvay, Karoly and Coslovich, Giacomo
- volume
- 11370
- pages
- 2 pages
- publisher
- SPIE
- conference name
- Ultrafast Optics XII 2019
- conference location
- Bol, Croatia
- conference dates
- 2019-10-06 - 2019-10-11
- external identifiers
-
- scopus:85124506941
- ISSN
- 1996-756X
- 0277-786X
- ISBN
- 9781510635128
- language
- English
- LU publication?
- yes
- id
- d3450a97-0f45-4ec9-9ecc-a1a04ae1fed0
- date added to LUP
- 2022-04-05 13:51:12
- date last changed
- 2024-03-25 23:23:27
@inproceedings{d3450a97-0f45-4ec9-9ecc-a1a04ae1fed0, abstract = {{<p>Extreme ultraviolet (XUV) laser radiation is commonly produced via high-harmonic generation (HHG) in gases. The lasers that drive this process typically operate at low pulse repetition rates (<100 kHz). Under these operating conditions, the plasma generated by each laser pulse clears the generation volume before the next pulse arrives. Therefore, each laser pulse interacts with fresh plasma-free gas, where phase-matching facilitates efficient HHG. However, applications requiring high counting statistics or frequency-comb precision make high repetition rates (>10 MHz) necessary. Unfortunately, at high repetition rates, plasma accumulates in the XUV generation region and prevents phase-matching, resulting in low HHG efficiency. We use high-temperature gas mixtures to increase the gas translational velocity, thus reduce plasma accumulation and facilitate phase-matching. We experimentally achieve phase-matched HHG at a repetition rate of 77 MHz, generating record power of ~2 mW at 97 nm and ~0.9 mW at 67 nm.</p>}}, author = {{Porat, G. and Heyl, C. M. and Schoun, S. B. and Benko, C. and Dörre, N. and Corwin, K. L. and Ye, J.}}, booktitle = {{Ultrafast Optics XII}}, editor = {{Jovanovic, Igor and Resan, Bojan and Osvay, Karoly and Coslovich, Giacomo}}, isbn = {{9781510635128}}, issn = {{1996-756X}}, keywords = {{Extreme ultraviolet frequency comb; High harmonic generation; Nonlinear optics; Ultrafast optics}}, language = {{eng}}, pages = {{94--95}}, publisher = {{SPIE}}, series = {{Proceedings of SPIE - The International Society for Optical Engineering}}, title = {{Phase-matched extreme-ultraviolet frequency-comb generation}}, volume = {{11370}}, year = {{2019}}, }