Nicholas Langellier
Harvard University
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Publication
Featured researches published by Nicholas Langellier.
Proceedings of SPIE | 2012
Nicholas Langellier; Chih-Hao Li; Alexander G. Glenday; Guoqing Chang; Hung-Wen Chen; Jinkang Lim; Gabor Furesz; Franz X. Kärtner; David F. Phillips; Dimitar D. Sasselov; Andrew Szentgyorgyi; Ronald L. Walsworth
We report the design, installation and testing of a broadband green astro-comb on the HARPS-N spectrograph at the TNG telescope. The astro-comb consists of over 7000 narrow lines (<10-6 nm width) spaced by 16 GHz (0.02 nm at 550 nm) with wavelengths stabilized to the Global Positioning System (GPS) and with flat power from 500 to 620 nm. The narrow lines are used to calibrate the spectrograph and measure its line profile. The short term sensitivity of HARPS-N is measured to be less than 2 cm/s and the long-term drift of the spectrograph is approximately 10 cm/s/day. The astrocomb has been partially automated with future work planned to turn the astro-comb into a fully automated, push button instrument.
Frontiers in Optics | 2014
Chih-Hao Li; Alexander G. Glenday; Guoqing Chang; Li-Jin Chen; Gabor Furesz; Nicholas Langellier; A. S. Zibrov; Franz X. Kaertner; David F. Phillips; Dimitar D. Sasselov; Andrew Szentgyorgyi; Ronald L. Walsworth
Our astro-comb, providing >7000 lines spaced by 16 GHz from 500-620 nm, has been deployed at TNG telescope as a wavelength calibrator for HARPS-N spectrograph. It provides sub-10 cm/s calibration accuracy required for exo-Earth searches.
conference on lasers and electro optics | 2012
Guoqing Chang; Chih-Hao Li; Alexander G. Glenday; Gabor Furesz; Nicholas Langellier; Li-Jin Chen; Matthew Webber; Jinkang Lim; Hung-Wen Chen; David F. Phillips; Andrew Szentgyorgyi; Ronald L. Walsworth; Franz X. Kärtner
We demonstrate a broadband visible-wavelength astro-comb enabled by two key technologies: dispersion-managed, fiber-optic Cherenkov radiation for green-to-red source-comb generation and complementary chirped-mirror pairs for constructing broadband Fabry-Perot filtering cavities.
Physical Review D | 2016
S. Kolkowitz; Igor Pikovski; Nicholas Langellier; Mikhail D. Lukin; L. Walsworth; J. Ye
Optica | 2015
Alexander G. Glenday; Chih-Hao Li; Nicholas Langellier; Guoqing Chang; Li-Jin Chen; Gabor Furesz; Alexander A. Zibrov; Franz X. Kärtner; David F. Phillips; Dimitar D. Sasselov; Andrew Szentgyorgyi; Ronald L. Walsworth
Optics Letters | 2012
Chih-Hao Li; Guoqing Chang; Alexander G. Glenday; Nicholas Langellier; A. S. Zibrov; David F. Phillips; Franz X. Kärtner; Andrew Szentgyorgyi; Ronald L. Walsworth
Bulletin of the American Physical Society | 2015
Nicholas Langellier; Shimon Kolkowitz; Avi Loeb; Mikhail D. Lukin; Dani Maoz; J. Ye; Ronald L. Walsworth
Bulletin of the American Physical Society | 2018
Aakash Ravi; David Phillips; Nicholas Langellier; Timothy Milbourne; Maya Miklos; Ronald L. Walsworth
Bulletin of the American Physical Society | 2017
Aakash Ravi; Leopoldo L. Martin; David Phillips; Nicholas Langellier; Timothy Milbourne; Christian Dolliff; Ronald L. Walsworth
Bulletin of the American Physical Society | 2017
Nicholas Langellier; Timothy Milbourne; Aakash Ravi; Christian Dolliff; David Phillips; Ronald L. Walsworth