Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Atif Shehzad"'
Autor:
Asma Imran, Fozia Sardar, Zabish Khaliq, Muhammad Shoib Nawaz, Atif Shehzad, Muhammad Ahmad, Sumera Yasmin, Sughra Hakim, Babur S. Mirza, Fathia Mubeen, Muhammad Sajjad Mirza
Publikováno v:
Frontiers in Bioengineering and Biotechnology, Vol 9 (2022)
An extensive use of chemical fertilizers has posed a serious impact on food and environmental quality and sustainability. As the organic and biofertilizers can satisfactorily fulfill the crop’s nutritional requirement, the plants require less chemi
Externí odkaz:
https://doaj.org/article/10559abf64cb49dda8ae3ccf63f95f1e
Publikováno v:
Global Regional Review. :396-402
The article claims that one way to be used use the proximity in empirical analyses of framing victims of international conflicts is to measure the religious proximity and their intention of intervention between the media of reporting country and conf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b6367e8a93186a8b669d0815cd30938
https://doi.org/10.31703/grr.2020(v-i).43
https://doi.org/10.31703/grr.2020(v-i).43
Coherently-averaged dual comb spectrometer at 7.7 µm with master and follower quantum cascade lasers
Autor:
Giulio Terrasanta, Thomas Südmeyer, Jérôme Faist, Kenichi Komagata, Stéphane Schilt, Atif Shehzad, Mattias Beck, Renaud Matthey, Andreas Hugi, Lukas Emmenegger, Pierre Brochard, Mehran Shahmohammadi, Valentin J. Wittwer, Filippos Kapsalidis, Michele Gianella, Pierre Jouy
Publikováno v:
Optics express. 29(12)
We demonstrate coherent averaging of the multi-heterodyne beat signal between two quantum cascade laser frequency combs in a master-follower configuration. The two combs are mutually locked by acting on the drive current to control their relative off
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adca4ffdf91ca8908ff8b749a6955bfe
https://pubmed.ncbi.nlm.nih.gov/34154154
https://pubmed.ncbi.nlm.nih.gov/34154154
Autor:
Stéphane Schilt, Richard Maulini, Philippe Giaccari, Renaud Matthey, Thomas Südmeyer, Atif Shehzad
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Laser interferometry enables measuring relative distance variations with an extreme sensitivity corresponding to a fraction of the considered optical wavelength, but has a very short unambiguous range of only half a wavelength. In this work, we inves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b09b28cac7655483c2340dd1724926c2
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542563
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542563
Coherently-Averaged Dual-Comb Spectrometer at 7.7 µm with Master and Follower Quantum Cascade Lasers
Autor:
Pierre Jouy, Thomas Südmeyer, Stéphane Schilt, Andreas Hugi, Jérôme Faist, Renaud Matthey, Filippos Kapsalidis, Pierre Brochard, Michele Gianella, Kenichi Komagata, Mehran Shahmohammadi, Mattias Beck, Atif Shehzad, Lukas Emmenegger, Giulio Terrasanta, Valentin J. Wittwer
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Mid-infrared (MIR) quantum cascade laser (QCL) frequency combs are an appealing technology for dual-comb spectroscopy as they cover strong absorption bands of many relevant molecules in the MIR region and enable measurements with sub-microsecond time
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::471e641537d8155f3bc9ed307558f444
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542530
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542530
Autor:
Kenichi Komagata, Filippos Kapsalidis, Thomas Südmeyer, Valentin J. Wittwer, Marin Hamrouni, Atif Shehzad, Pierre Jouy, M. Beck, Stéphane Schilt, Andreas Hugi, Jérôme Faist, Renaud Matthey
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Mid-infrared (MIR) quantum cascade laser (QCL) frequency combs are a convenient technology for MIR dual comb spectroscopy. A common method to increase the signal-to-noise ratio in this type of applications is by mutual stabilization of the frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::311edda46d60c4e2e9634dc7910a465f
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542065
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542065
Autor:
Marin Hamrouni, Kenichi Komagata, Mehran Shahmohammadi, Atif Shehzad, Jérôme Faist, Stéphane Schilt, Andreas Hugi, Renaud Matthey, M. Beck, Filippos Kapsalidis, Pierre Jouy, Thomas Südmeyer, Valentin J. Wittwer
Publikováno v:
Conference on Lasers and Electro-Optics.
High-resolution spectroscopy in the mid-infrared requires stable frequency references. A frequency comb emitted by a quantum cascade laser is locked to a molecular transition, demonstrating 30-kHz frequency stability up to 5000-s integration time.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f33d3a5558a02341ae0a4e6964cbf35f
https://doi.org/10.1364/cleo_si.2021.stu1h.3
https://doi.org/10.1364/cleo_si.2021.stu1h.3
Autor:
Atif, Shehzad, Pierre, Brochard, Renaud, Matthey, Filippos, Kapsalidis, Mehran, Shahmohammadi, Mattias, Beck, Andreas, Hugi, Pierre, Jouy, Jérôme, Faist, Thomas, Südmeyer, Stéphane, Schilt
Publikováno v:
Optics express. 28(6)
The generation of frequency combs in the mid-infrared (MIR) spectral range by quantum cascade lasers (QCLs) has the potential for revolutionizing dual-comb multi-heterodyne spectroscopy in the molecular fingerprint region. However, in contrast to fre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::eb3a160988b0fed42958eddae7a10a7f
https://pubmed.ncbi.nlm.nih.gov/32225449
https://pubmed.ncbi.nlm.nih.gov/32225449
Autor:
Filippos Kapsalidis, Jérôme Faist, Mehran Shahmohammadi, Renaud Matthey, Kenichi Komagata, Thomas Südmeyer, Mattias Beck, Atif Shehzad, Pierre Jouy, Pierre Brochard, Stéphane Schilt, Andreas Hugi
Publikováno v:
Conference on Lasers and Electro-Optics.
We present a detailed frequency noise characterization of a mid-infrared QCL comb with separate investigations of an optical line, the mode spacing and the offset frequency, and show strong anti-correlation between the two free-running comb parameter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7e800862a24a36175325d257e6f757b
https://doi.org/10.1364/cleo_si.2020.sf2g.2
https://doi.org/10.1364/cleo_si.2020.sf2g.2
Publikováno v:
Scopus-Elsevier
The use of an unbalanced interferometer has been shown to be an interesting alternative to high-finesse optical cavities to reduce the frequency noise of a laser by active stabilization. In a self-heterodyne configuration, the resulting frequency-to-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e2072e3ee35d79cf25ff5ea062e1bab
https://doi.org/10.1109/cleoe-eqec.2019.8871889
https://doi.org/10.1109/cleoe-eqec.2019.8871889