Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Krishna, Twayana"'
Autor:
Mutasem Odeh, Krishna Twayana, Karen Sloyan, Juan E. Villegas, Sujith Chandran, Marcus S. Dahlem
Publikováno v:
IEEE Photonics Journal, Vol 11, Iss 5, Pp 1-10 (2019)
In this paper, we investigate the mode sensitivity (Smode) of subwavelength grating slot (SWGS) waveguides. Smode is an important parameter in various waveguide-based photonic circuits such as sensors, modulators, and thermally-controlled devices. It
Externí odkaz:
https://doaj.org/article/a68f8975f3894014a4915fad8c410faa
Autor:
Krishna Twayana, Israel Rebolledo-Salgado, Ekaterina Deriushkina, Jochen Schröder, Magnus Karlsson, Victor Torres-Company
Publikováno v:
Micromachines, Vol 13, Iss 4, p 614 (2022)
In this review paper, we provide an overview of the state of the art in linear interferometric techniques using laser frequency comb sources. Diverse techniques including Fourier transform spectroscopy, linear spectral interferometry and swept-wavele
Externí odkaz:
https://doaj.org/article/fdfd6a4efc214c48b1c16c1f07c7ac7c
Publikováno v:
IEEE Photonics Journal, Vol 9, Iss 4, Pp 1-9 (2017)
Efficient edge coupling into a silicon waveguide is demonstrated using an optical fiber axicon lens operating at 1550 nm. The axicon was fabricated on the cleaved endfacet of an SMF-28e optical fiber using a focused ion beam milling process. The lens
Externí odkaz:
https://doaj.org/article/0ed605e10fe6453397933f2dbc4189b1
Autor:
KRISHNA TWAYANA
Measuring microcombs in amplitude and phase providesunique insight into the nonlinear cavity dynamics, but spectralphase measurements are experimentally challenging.Here, we report a linear heterodyne technique assisted byelectro-optic downconversion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acb88fa93e23e9ef1058572ec9038b74
Autor:
Israel, Rebolledo-Salgado, Zhichao, Ye, Simon, Christensen, Fuchuan, Lei, Krishna, Twayana, Jochen, Schröder, Martin, Zelan, Victor, Torres-Company
Publikováno v:
Optics express. 30(6)
Spectral broadening of optical frequency combs with high repetition rate is of significant interest in optical communications, radio-frequency photonics and spectroscopy. Silicon nitride waveguides (Si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::dfc8801aeea0939b69ed8ea3b9affdcb
https://pubmed.ncbi.nlm.nih.gov/35299311
https://pubmed.ncbi.nlm.nih.gov/35299311
Autor:
Fuchuan Lei, Zhichao Ye, Krishna Twayana, Yan Gao, Marcello Girardi, Óskar B. Helgason, Ping Zhao, Victor Torres-Company
Publikováno v:
Physical Review Letters (0031-9007) vol.130(2023)
Optical hyperparametric oscillation based on the third-order nonlinearity is one of the most significant mechanisms to generate coherent electromagnetic radiation and produce quantum states of light. Advances in dispersion-engineered high-$Q$ microre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58a7677ddd466fd5505a5515dd839c52
Autor:
Krishna Twayana, Fuchuan Lei, Zhichao Ye, Óskar B. Helgason, Israel Rebolledo Salgado, Magnus Karlsson, Victor Torres-Company
Publikováno v:
Conference on Lasers and Electro-Optics.
We demonstrate complex (amplitude and phase) spectral characterization of a 100 GHz repetition rate microcomb over a bandwidth exceeding C and L bands using a linear stepped heterodyne technique.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c27c503dec74641bf7b3206d16ca3b00
https://doi.org/10.1364/cleo_si.2022.sth5e.8
https://doi.org/10.1364/cleo_si.2022.sth5e.8
Autor:
Zhichao Ye, Fuchuan Lei, Krishna Twayana, Marcello Girardi, Peter A. Andrekson, Victor Torres‐Company
Publikováno v:
Laser and Photonics Reviews (1863-8880) vol.16(2022)
Multiple applications of relevance in photonics, such as spectrally efficient coherent communications, microwave synthesis or the calibration of astronomical spectrographs, would benefit from soliton microcombs operating at repetition rates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4e9e9840832c00b1cc7f0597b30ddf5
http://arxiv.org/abs/2108.07495
http://arxiv.org/abs/2108.07495
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Swept-wavelength interferometry (SWI) is a highly sensitive and versatile technique implemented in a diverse array of industrial and scientific applications. SWI uses a continuously tunable laser to capture the magnitude and phase response of a devic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d276d90c370ec30d7335975167240443
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542001
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542001
Autor:
Israel Rebolledo-Salgado, Jochen Schröder, Martin Zelan, Simon L. Christensen, Krishna Twayana, Victor Torres-Company, Zhichao Ye, Fuchuan Lei
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Dispersion-engineered silicon nitride waveguides are often used for broadening of frequency combs. Previous experiments have focused on anomalous dispersion waveguides pumped by femtosecond laser pulses, whereby coherent supercontinuum generation rel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f3cb0c4c158389ff2277f37f0ad39f1
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9541684
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9541684