{"id":21776,"date":"2020-07-06T20:04:00","date_gmt":"2020-07-06T17:04:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/highest-peak-power-and-excellent-stability-demonstrated-in-a-laser\/"},"modified":"2020-07-06T20:04:00","modified_gmt":"2020-07-06T17:04:00","slug":"highest-peak-power-and-excellent-stability-demonstrated-in-a-laser","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/highest-peak-power-and-excellent-stability-demonstrated-in-a-laser\/","title":{"rendered":"#Highest peak power and excellent stability demonstrated in a laser"},"content":{"rendered":"

“#Highest peak power and excellent stability demonstrated in a laser<\/strong>”<\/p>\n

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\n Long term stability of the Ho:YLF chirped pulse amplifier at a 1 kHz repetition rate. The average pulse energy Emean=52.5 mJ was measured over a period of 120 minutes. The standard deviation has a value of \u03c3rms=0.23%, the pulse-to-pulse energy fluctuations are \u0394Ep-to-p=2.1%. Left inset: Beam profile (far-field intensity distribution). Right inset: Autocorrelation trace of the re-compressed 52.5 mJ pulses, measured and simulated. Credit: MBI
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Power-scalable ultrafast laser sources in the midwave-infrared (MWIR) are a key element for basic research and app<\/a>lications in material processing and medicine. Optical amplifiers based on chirped pulse amplification (CPA) are used to generate high intensity pulses, a technique awarded with the Nobel Prize in physics in 2018. In the CPA scheme, a weak temporally stretched seed pulse is amplified to high energy in a laser amplifier and finally re-compressed resulting in an ultrashort pulse of very high intensity. Applying this concept a new system was developed at MBI delivering few-ps pulses at 2 \u03bcm wavelength with peak power beyond 10 GW (10 billion watt) at a 1 kHz repetition rate. The emitted pulses are characterized by excellent stability and brilliant beam quality. The results are reported in the latest issue of Optics Letters<\/i>.<\/p>\n

The main amplifiers of the 2-\u03bcm CPA system are based on Ho:YLF crystals and consist of a highly stable regenerative amplifier and two booster amplifiers. All of them are operated at room temperature and pumped by continuous-wave Tm:fiber lasers with a total power of 270 W. Starting from a 2-\u03bcm supercontinuum source the seed pulses are stretched and pre-amplified and subsequently fed into the Ho:YLF amplifier chain. The re-compressed pulse energy of the Ho:YLF CPA amounts to 52.5 mJ and reveals an excellent pulse-to-pulse stability of 93%. The recorded autocorrelation trace exhibits a FWHM of 4.1 ps. This corresponds to a duration of the main pulse of 2.4 ps (FWHM) with an estimated energy content of 85%, translating into 17 GW peak power. The latter and the pulse energy of >50 mJ represent the highest values ever achieved for few-ps pulses at 2 \u03bcm wavelength yet.<\/p>\n

This source is currently being applied as pump in a system for the generation of few-cycle pulses around 5-\u03bcm with multi-millijoule energies. Applications in nonlinear optics, spectroscopy and materials processing are underway.<\/p>\n

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More information:<\/strong>
\n Lorenz von Grafenstein et al, 205 \u00b5m chirped pulse amplification system at a 1 kHz repetition rate\u201424 ps pulses with 17 GW peak power, Optics Letters<\/i> (2020). DOI: 10.1364\/OL.395496\n <\/div>\n

\n Citation<\/strong>:
\n Highest peak power and excellent stability demonstrated in a laser (2020, July 6)
\n retrieved 6 July 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-07-highest-peak-power-excellent-stability.html<\/p>\n

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“#Highest peak power and excellent stability demonstrated in a laser” Long term stability of the Ho:YLF chirped pulse amplifier at a 1 kHz repetition rate. The average pulse energy Emean=52.5 mJ was measured over a period of 120 minutes. The standard deviation has a value of \u03c3rms=0.23%, the pulse-to-pulse energy fluctuations are \u0394Ep-to-p=2.1%. Left inset:…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[33566,11724],"class_list":["post-21776","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-highest-peak-power-and-excellent-stability-demonstrated-in-a-laser","tag-optics-photonics"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/21776","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=21776"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/21776\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=21776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=21776"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=21776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}