Operation of a broadband visible-wavelength astro-comb with a high-resolution astrophysical spectrograph
نویسندگان
چکیده
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA Department of Physics, Harvard University, 60 Garden Street, Cambridge, Massachusetts 02138, USA Department of EECS and RLE, Massachusetts Institute of Technology, Massachusetts Avenue, Massachusetts 02139, USA Idesta Quantum Electronics LLC, 56 Sparta Ave., Newton, New Jersey 07860, USA Center for Free-Electron Laser Science, DESY and Department of Physics, University of Hamburg, D-22607 Hamburg, Germany
منابع مشابه
Toward a broadband astro-comb: effects of nonlinear spectral broadening in optical fibers.
We propose and analyze a new approach to generate a broadband astro-comb by spectral broadening of a narrowband astro-comb inside a highly nonlinear optical fiber. Numerical modeling shows that cascaded four-wave-mixing dramatically degrades the input comb's side-mode suppression and causes side-mode amplitude asymmetry. These two detrimental effects can systematically shift the center-of-gravi...
متن کاملCalibration of an astrophysical spectrograph below 1 m/s using a laser frequency comb.
We deployed two wavelength calibrators based on laser frequency combs ("astro-combs") at an astronomical telescope. One astro-comb operated over a 100 nm band in the deep red (∼ 800 nm) and a second operated over a 20 nm band in the blue (∼ 400 nm). We used these red and blue astro-combs to calibrate a high-resolution astrophysical spectrograph integrated with a 1.5 m telescope, and demonstrate...
متن کاملIn-situ determination of astro-comb calibrator lines to better than 10 cm s(-1).
Improved wavelength calibrators for high-resolution astrophysical spectrographs will be essential for precision radial velocity (RV) detection of Earth-like exoplanets and direct observation of cosmological deceleration. The astro-comb is a combination of an octave-spanning femtosecond laser frequency comb and a Fabry-Pérot cavity used to achieve calibrator line spacings that can be resolved by...
متن کاملVisible wavelength astro-comb.
We demonstrate a tunable laser frequency comb operating near 420 nm with mode spacing of 20-50 GHz, usable bandwidth of 15 nm and output power per line of ~20 nW. Using the TRES spectrograph at the Fred Lawrence Whipple Observatory, we characterize this system to an accuracy below 1m/s, suitable for calibrating high-resolution astrophysical spectrographs used, e.g., in exoplanet studies.
متن کاملOptimization of filtering schemes for broadband astro-combs.
To realize a broadband, large-line-spacing astro-comb, suitable for wavelength calibration of astrophysical spectrographs, from a narrowband, femtosecond laser frequency comb ("source-comb"), one must integrate the source-comb with three additional components: (1) one or more filter cavities to multiply the source-comb's repetition rate and thus line spacing; (2) power amplifiers to boost the p...
متن کامل