Now showing items 1-9 of 9

• Broadband Dispersion-Free Optical Cavities Based on Zero Group Delay Dispersion Mirror Sets ﻿

(Optical Society of America, 2010)
A broadband dispersion-free optical cavity using a zero group delay dispersion (zero-GDD) mirror set is demonstrated. In general zero-GDD mirror sets consist of two or more mirrors with opposite group delay dispersion ...
• Calibration of an Astrophysical Spectrograph Below 1 m/s Using a Laser Frequency Comb ﻿

(Optical Society of America, 2012)
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 ...
• Conjugate Fabry–Perot Cavity Pair for Improved Astro-Comb Accuracy ﻿

(Optical Society of America, 2012)
We propose a new astro-comb mode-filtering scheme composed of two Fabry–Perot cavities (coined “conjugate Fabry–Perot cavity pair”). Simulations indicate that this new filtering scheme makes the accuracy of astro-comb ...
• HARPS-N Observes the Sun as a Star ﻿

(IOP Publishing, 2015)
Radial velocity (RV) perturbations induced by stellar surface inhomogeneities including spots, plages and granules currently limit the detection of Earth-twins using Doppler spectroscopy. Such stellar noise is poorly ...
• In-Situ Determination of Astro-Comb Calibrator Lines to Better Than 10 cm $s^{-1}$ ﻿

(Optical Society of America (OSA), 2010)
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. ...
• In-situ determination of astro-comb calibrator lines to better than $\textrm{10 cm s}^{-1}$ ﻿

(Optical Society of America, 2010)
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. ...
• ﻿Optimization of Filtering Schemes for Broadband Astro-Combs ﻿

(Optical Society of America, 2012)
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 ...
• Toward a Broadband Astro-comb: Effects of Nonlinear Spectral Broadening in Optical Fibers ﻿

(Optical Society of America, 2010)
We propose and analyze a new approach to generate a broadband astrocomb by spectral broadening of a narrowband astro-comb inside a highly nonlinear optical fiber. Numerical modeling shows that cascaded four-wave-mixing ...
• Visible Wavelength Astro-Comb ﻿

(Optical Society of America (OSA), 2010)
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 ...