Zobrazeno 1 - 10
of 520
pro vyhledávání: '"Fredrik, Laurell"'
Publikováno v:
npj Nanophotonics, Vol 1, Iss 1, Pp 1-6 (2024)
Abstract Backward wave oscillators represent a class of tunable sources of electromagnetic radiation that do not require a resonant cavity to satisfy the oscillation condition. In the optical regime, the Backward Wave Optical Parametric Oscillator (B
Externí odkaz:
https://doaj.org/article/c95eb7de75f448af8a422bbc29334928
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-10 (2023)
Abstract Similar to x-ray imaging, THz imaging will require high power and high resolution to advance relevant applications. Previously demonstrated THz imaging usually experiences one or several difficulties in insufficient source power, poor spectr
Externí odkaz:
https://doaj.org/article/9bb3cbcc3c44440195e455bc207d1b08
Autor:
Seunghan Song, Fredrik Laurell, Bailey Meehan, Thomas W. Hawkins, John Ballato, Ursula J. Gibson
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
The authors show that micron size fibers comprised of semiconductor and metallic materials can be purified or doped, recrystallized or have the constituents rearranged into a variety of structures with device prospects.
Externí odkaz:
https://doaj.org/article/6e1e645195a84570b0906af01e2fcb0b
Autor:
Helen E. Parker, Sanghamitra Sengupta, Achar V. Harish, Ruben G. Soares, Haakan N. Joensson, Walter Margulis, Aman Russom, Fredrik Laurell
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022)
Abstract Microfluidics has emerged rapidly over the past 20 years and has been investigated for a variety of applications from life sciences to environmental monitoring. Although continuous-flow microfluidics is ubiquitous, segmented-flow or droplet
Externí odkaz:
https://doaj.org/article/e6517c694f274f38a4459384284375cb
Autor:
Dorota Tomaszewska-Rolla, Robert Lindberg, Valdas Pasiskevicius, Fredrik Laurell, Grzegorz Soboń
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022)
Abstract In this work, we show that the nonlinear evolution of femtosecond seed pulses with different parameters (temporal and spectral shapes, repetition rate, pulse energy) in an Yb-fiber amplifier leads to gain-managed nonlinear amplification, ena
Externí odkaz:
https://doaj.org/article/f4313d6ca19642ce98b810a53dab4a96
Publikováno v:
APL Photonics, Vol 6, Iss 9, Pp 091102-091102-12 (2021)
Established waveguide fabrication technologies on lithium niobate (LN) and potassium titanyl phosphate (KTP) were revisited, and a comparative analysis of their performance for type-0 quasi-phase matched second-harmonic generation at 1.55 µm was pro
Externí odkaz:
https://doaj.org/article/6b550d0cd4c2429ca28cb8dbb14b3e41
Publikováno v:
IEEE Photonics Journal, Vol 11, Iss 1, Pp 1-9 (2019)
Distributed-feedback waveguide lasers based on Bragg-grating resonators generate ultranarrow-linewidth emission. Oscillation at the center of the reflection band ensures maximum reflectivity, hence minimum linewidth. The required π/2 phase shift is
Externí odkaz:
https://doaj.org/article/ea9edbd518654ac694d9ea8475647b1e
Autor:
Helen E. Parker, Sanghamitra Sengupta, Achar V. Harish, Ruben R. G. Soares, Haakan N. Joensson, Walter Margulis, Aman Russom, Fredrik Laurell
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-1 (2022)
Externí odkaz:
https://doaj.org/article/9818667a0b344696afcd85624bba0697
Publikováno v:
Optics express. 30(22)
A new technique for mode-locking is demonstrated based on two lasers sharing one leg for sum-frequency generation. When the two lasers had equal round trip time one will produce bright pulses and the other dark pulses. Both lasers used Nd:YVO
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::76abf38b81e4d9c98521cf196cad56b9
https://pubmed.ncbi.nlm.nih.gov/36299015
https://pubmed.ncbi.nlm.nih.gov/36299015
Publikováno v:
Optics express. 30(12)
Electrical corona discharge is employed in this work to deposit ions on the surface of an optical fiber, creating a strong electric field that is used for poling. Green laser light propagating in the core frees photocarriers that are displaced by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::1209745e6eeca31de5e60766ca93844b
https://pubmed.ncbi.nlm.nih.gov/36224801
https://pubmed.ncbi.nlm.nih.gov/36224801