Results 61 to 70 of about 333 (144)

Point‐by‐point femtosecond laser inscription of high‐reflectivity, low‐birefringence fiber Bragg gratings enabled by curvature‐induced astigmatism and beam shaping

JPhys Photonics
Direct laser writing of fiber Bragg gratings (FBG) in free-standing optical fibers is often avoided due to the cylindrical geometry of the fiber, which distorts laser beam focusing and affects process efficiency.
T Baghdasaryan, K Danielyan, B Cloostermans, K Watanabe   +3 more
doaj   +1 more source

Strong Carbon Features and a Red Early Color in the Underluminous Type Ia SN 2022xkq

The Astrophysical Journal, 2023
We present optical, infrared, ultraviolet, and radio observations of SN 2022xkq, an underluminous fast-declining Type Ia supernova (SN Ia) in NGC 1784 ( D ≈ 31 Mpc), from
Jeniveve Pearson, David J. Sand, Peter Lundqvist, Lluís Galbany, Jennifer E. Andrews, K. Azalee Bostroem, Yize Dong, Emily Hoang, Griffin Hosseinzadeh, Daryl Janzen, Jacob E. Jencson, Michael J. Lundquist, Darshana Mehta, Nicolás Meza Retamal, Manisha Shrestha, Stefano Valenti, Samuel Wyatt, Joseph P. Anderson, Chris Ashall, Katie Auchettl, Eddie Baron, Stéphane Blondin, Christopher R. Burns, Yongzhi Cai, Ting-Wan Chen, Laura Chomiuk, David A. Coulter, Dane Cross, Kyle W. Davis, Thomas de Jaeger, James M. DerKacy, Dhvanil D. Desai, Georgios Dimitriadis, Aaron Do, Joseph R. Farah, Ryan J. Foley, Mariusz Gromadzki, Claudia P. Gutiérrez, Joshua Haislip, Jonay I. González Hernández, Jason T. Hinkle, Willem B. Hoogendam, D. Andrew Howell, Peter Hoeflich, Eric Hsiao, Mark E. Huber, Saurabh W. Jha, Cristina Jiménez Palau, Charles D. Kilpatrick, Vladimir Kouprianov, Sahana Kumar, Lindsey A. Kwok, Conor Larison, Natalie LeBaron, Xavier Le Saux, Jing Lu, Curtis McCully, Tycho Mera Evans, Peter Milne, Maryam Modjaz, Nidia Morrell, Tomás E. Müller-Bravo, Megan Newsome, Matt Nicholl, Estefania Padilla Gonzalez, Anna V. Payne, Craig Pellegrino, Kim Phan, Jonathan Pineda-García, Anthony L. Piro, Lara Piscarreta, Abigail Polin, Daniel E. Reichart, César Rojas-Bravo, Stuart D. Ryder, Irene Salmaso, Michaela Schwab, Melissa Shahbandeh, Benjamin J. Shappee, Matthew R. Siebert, Nathan Smith, Jay Strader, Kirsty Taggart, Giacomo Terreran, Samaporn Tinyanont, M. A. Tucker, Giorgio Valerin, D. R. Young   +87 more
doaj   +1 more source

Astrophotonic technologies

Optical and Infrared Interferometry and Imaging IX
Proc. of SPIE 13095, Optical and Infrared Interferometry and Imaging IX, Astronomical Telescopes + Instrumentation, Yokohama (Japan), 16-21 June 2024 (in press).
openaire   +2 more sources

Astrophotonics: molding the flow of light in astronomical instruments

Optics express, 2017
Optics Express - Special Issue: Astrophotonics (eds. Withford, Bryant, Thomson), Invited review, in press (10 pages, no figures)
Bland-Hawthorn, Joss, Leon-Saval, Sergio
openaire   +3 more sources

An on-chip astrophotonic spectrograph with a resolving power of 12,000

, 2022
With the upcoming extremely large telescopes (ELTs), the volume, mass, and cost of the associated spectrographs will scale with the telescope diameter.
Nemanja Jovanovic (8325369), Pradip Gatkine (14360505), Dimitri Mawet (14389548), Jeffrey Jewell (9229874), J. Kent Wallace (6918797)   +4 more
core   +1 more source

Ultrafast laser inscription of a 121-waveguide fan-out for astrophotonics [PDF]

Optics Letters, 2012
Using ultrafast laser inscription, we report the fabrication of a prototype three-dimensional 121-waveguide fan-out device capable of reformatting the output of a 120 core multicore fiber (MCF) into a one-dimensional linear array. When used in conjunction with an actual MCF, we demonstrate that the reformatting function using this prototype would ...
R. R. Thomson, R. J. Harris, T. A. Birks, G. Brown, J. Allington-Smith, J. Bland-Hawthorn   +5 more
openaire   +3 more sources

Femtosecond optical parametric oscillator frequency combs [PDF]

, 2015
Techniques to measure and manipulate the carrier-envelope phase within femtosecond optical parametric oscillators (OPOs) allow their outputs to be stabilized in a way that produces a frequency comb structure, potentially tunable throughout the ...
Alireza Marandi, Kobayashi, Yohei, Zhaowei Zhang, Marandi, Alireza, Torizuka, Kenji, Zhang, Zhaowei, Kenji Torizuka, Yohei Kobayashi, Robert L Byer, Richard A McCracken, Derryck T Reid, Reid, Derryck Telford; id_orcid, Byer, Robert L., McCracken, Richard A.; id_orcid   +13 more
core   +1 more source

Multi-mode to single-mode conversion in a 61 port photonic lantern [PDF]

, 2010
Efficient multi-mode (MM) to single-mode (SM) conversion in a 61 port splitter or “Photonic Lantern” is demonstrated. The coupling loss from a 100 µm core diameter MM section to an ensemble of 61 SM fibers and back to another 100 µm core MM section is ...
Bland-Hawthorn, Joss, Noordegraaf, Danny, Skovgaard, Peter M.W., Lægsgaard, Jesper, Maack, Martin D.   +4 more
core   +1 more source

The Molecular Exoskeleton of the Ring-like Planetary Nebula NGC 3132

The Astrophysical Journal
We present Submillimeter Array (SMA) mapping of ^12 CO J = 2 → 1, ^13 CO J = 2 → 1, and CN N = 2 → 1 emission from the ring-like planetary nebula NGC 3132, one of the subjects of JWST Early Release Observation near-infrared imaging.
Joel H. Kastner, David J. Wilner, Paula Moraga Baez, Jesse Bublitz, Orsola De Marco, Raghvendra Sahai, Al Wootten   +6 more
doaj   +1 more source

Ultrafast laser inscription of an integrated photonic lantern [PDF]

, 2011
We used ultrafast laser inscription to fabricate three-dimensional integrated optical transitions that efficiently couple light from a multimode waveguide to a two-dimensional array of single mode waveguides and back.
Leon-Saval, S G, T. A. Birks, S. G. Leon-Saval, A. K. Kar, Kar, A K, R. R. Thomson, J. Bland-Hawthorn, Kar, A. K., Thomson, R R, Bland-Hawthorn, J., Bland-Hawthorn, J, Leon-Saval, S. G., Thomson, R. R., Birks, T. A., Birks, Tim A; id_orcid   +14 more
core   +1 more source