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Thiré N, Chatterjee G, Pertot Y, Albert O, Karras G, Zhang Y, Wyatt AS, Towrie M, Springate E, Greetham GM, Forget N. A versatile high-average-power ultrafast infrared driver tailored for high-harmonic generation and vibrational spectroscopy. Sci Rep 2023; 13:18874. [PMID: 37914852 PMCID: PMC10620204 DOI: 10.1038/s41598-023-46325-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/30/2023] [Indexed: 11/03/2023] Open
Abstract
We report on an ultrafast infrared optical parametric chirped-pulse amplifier (OPCPA), pumped by a 200-W thin-disk Yb-based regenerative amplifier at a repetition rate of 100 kHz. The OPCPA is tunable in the spectral range 1.4-3.9 [Formula: see text]m, generating up to 23 W of < 100-fs signal and 13 W of < 200-fs idler pulses for infrared spectroscopy, with additional spectral filtering capabilities for Raman spectroscopy. The OPCPA can also yield 19 W of 49-fs 1.75-[Formula: see text]m signal or 5 W of 62-fs 2.8-[Formula: see text]m idler pulses with active carrier-to-envelope-phase (CEP) stabilisation for high-harmonic generation (HHG). We illustrate the versatility of the laser design, catering to various experimental requirements for probing ultrafast science.
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Affiliation(s)
- Nicolas Thiré
- Fastlite, 165 route des cistes, 06600, Antibes, France.
| | - Gourab Chatterjee
- STFC Central Laser Facility, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK.
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA.
| | - Yoann Pertot
- Fastlite, 165 route des cistes, 06600, Antibes, France
| | | | - Gabriel Karras
- STFC Central Laser Facility, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Yu Zhang
- STFC Central Laser Facility, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK
| | - Adam S Wyatt
- STFC Central Laser Facility, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK
| | - Michael Towrie
- STFC Central Laser Facility, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK
| | - Emma Springate
- STFC Central Laser Facility, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK
| | - Gregory M Greetham
- STFC Central Laser Facility, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK
| | - Nicolas Forget
- Fastlite, 165 route des cistes, 06600, Antibes, France
- CNRS UMR7010 INPHYNI, 1361 route des Lucioles, 06560, Valbonne, France
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Wang E, Whitcomb LA, Chicco AJ, Wilson JW. Transient absorption spectroscopy and imaging of redox in muscle mitochondria. BIOMEDICAL OPTICS EXPRESS 2022; 13:2103-2116. [PMID: 35519286 PMCID: PMC9045930 DOI: 10.1364/boe.452559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/03/2022] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
Mitochondrial redox is an important indicator of cell metabolism and health, with implications in cancer, diabetes, aging, neurodegenerative diseases, and mitochondrial disease. The most common method to observe redox of individual cells and mitochondria is through fluorescence of NADH and FAD+, endogenous cofactors serve as electron transport inputs to the mitochondrial respiratory chain. Yet this leaves out redox within the respiratory chain itself. To a degree, the missing information can be filled in by exogenous fluorophores, but at the risk of disturbed mitochondrial permeability and respiration. Here we show that variations in respiratory chain redox can be detected up by visible-wavelength transient absorption microscopy (TAM). In TAM, the selection of pump and probe wavelengths can provide multiphoton imaging contrast between non-fluorescent molecules. Here, we applied TAM with a pump at 520nm and probe at 450nm, 490nm, and 620nm to elicit redox contrast from mitochondrial respiratory chain hemeproteins. Experiments were performed with reduced and oxidized preparations of isolated mitochondria and whole muscle fibers, using mitochondrial fuels (malate, pyruvate, and succinate) to set up physiologically relevant oxidation levels. TAM images of muscle fibers were analyzed with multivariate curve resolution (MCR), revealing that the response at 620nm probe provides the best redox contrast and the most consistent response between whole cells and isolated mitochondria.
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Affiliation(s)
- Erkang Wang
- Department of Electrical & Computer
Engineering, Colorado State University,
1373 Campus Delivery, Fort Collins, CO 80523, USA
| | - Luke A. Whitcomb
- Department of Biomedical Sciences,
Colorado State University, 1601 Campus
Delivery, Fort Collins, CO 80523, USA
| | - Adam J. Chicco
- Department of Biomedical Sciences,
Colorado State University, 1601 Campus
Delivery, Fort Collins, CO 80523, USA
| | - Jesse W. Wilson
- Department of Electrical & Computer
Engineering, Colorado State University,
1373 Campus Delivery, Fort Collins, CO 80523, USA
- School of Biomedical Engineering,
Colorado State University, 1301 Campus
Delivery, Fort Collins, CO 80523, USA
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