{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:31:36Z","timestamp":1760236296122,"version":"build-2065373602"},"reference-count":33,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2021,11,9]],"date-time":"2021-11-09T00:00:00Z","timestamp":1636416000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["PD\/BD\/135177\/2017","PD\/00505\/2012"],"award-info":[{"award-number":["PD\/BD\/135177\/2017","PD\/00505\/2012"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Laserlab Portugal","award":["PINFRA\/22124\/2016"],"award-info":[{"award-number":["PINFRA\/22124\/2016"]}]},{"DOI":"10.13039\/100015668","name":"Laserlab-Europe","doi-asserted-by":"publisher","award":["871124"],"award-info":[{"award-number":["871124"]}],"id":[{"id":"10.13039\/100015668","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Photonics"],"abstract":"<jats:p>We present the design of an ultrafast optical parametric chirped pulse amplifier (OPCPA) operating at 3 \u00b5m yielding few-cycle pulses and multi-mJ output energy. This design demonstrates that with a configuration of a single crystal or combination of crystals (KTA and MgO:LN) it is possible to achieve output energies above the mJ with sufficient bandwidth to allow compression to just 5-optical cycles. Here, we consider a 1 \u00b5m mJ-level picosecond chirped pulse amplifier (CPA), a typical pumping source for this type of non-linear amplifiers. Compression with a simple bulk material enables reaching close to the pulse Fourier-transform limited duration, paving the way to high energy, ultrafast mid-infrared pulses.<\/jats:p>","DOI":"10.3390\/photonics8110503","type":"journal-article","created":{"date-parts":[[2021,11,9]],"date-time":"2021-11-09T12:46:23Z","timestamp":1636461983000},"page":"503","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Multi-mJ Scaling of 5-Optical Cycle, 3 \u00b5m OPCPA"],"prefix":"10.3390","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5472-9433","authenticated-orcid":false,"given":"Joana","family":"Alves","sequence":"first","affiliation":[{"name":"Group of Lasers and Plasmas (GoLP), Instituto de Plasmas e Fus\u00e3o Nuclear (IPFN), Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1521-6392","authenticated-orcid":false,"given":"Hugo","family":"Pires","sequence":"additional","affiliation":[{"name":"Group of Lasers and Plasmas (GoLP), Instituto de Plasmas e Fus\u00e3o Nuclear (IPFN), Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"}]},{"given":"Celso P.","family":"Jo\u00e3o","sequence":"additional","affiliation":[{"name":"Group of Lasers and Plasmas (GoLP), Instituto de Plasmas e Fus\u00e3o Nuclear (IPFN), Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"},{"name":"LaserLeap Technologies, Rua Coronel J\u00falio Veiga Sim\u00e3o, CTCV, Edif\u00edcio B, 3025-307 Coimbra, Portugal"}]},{"given":"Gon\u00e7alo","family":"Figueira","sequence":"additional","affiliation":[{"name":"Group of Lasers and Plasmas (GoLP), Instituto de Plasmas e Fus\u00e3o Nuclear (IPFN), Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"290","DOI":"10.3390\/photonics8080290","article-title":"Mid-infrared few-cycle pulse generation and amplification","volume":"8","author":"Tian","year":"2021","journal-title":"Photonics"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1287","DOI":"10.1126\/science.1218497","article-title":"Bright coherent ultrahigh harmonics in the keV X-ray regime from mid-infrared femtosecond lasers","volume":"336","author":"Popmintchev","year":"2012","journal-title":"Science"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1038\/s41567-018-0315-5","article-title":"High-harmonic generation from solids","volume":"15","author":"Ghimire","year":"2018","journal-title":"Nat. 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