Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session E09: Laser and Nonlinear Optics
2:00 PM–4:00 PM,
Tuesday, June 1, 2021
Chair: Carlos Trallero, University of Connecticut
Abstract: E09.00003 : Development of laser system for atom interferometric detection of gravitational waves and dark matter
2:24 PM–2:36 PM
Live
Presenter:
Tejas Deshpande
(Northwestern University)
Authors:
Tejas Deshpande
(Northwestern University)
Kenneth DeRose
(Northwestern University)
Jonah Glick
(Northwestern University)
Tim Kovachy
(Northwestern University)
The AI laser system has the following requirements: (a) high power (> 8 W), (b) tunability (679-698 nm), (c) stable absolute frequency (< 10 Hz linewidth), (d) low wavefront imperfections (< λ/1000), and (e) stable and controllable pointing (< 30 nrad). This talk will focus on our efforts to achieve target specifications for (a)-(c). These specifications are achieved using two low-noise Titanium:Sapphire lasers and a frequency comb. In the GW mode, output from each laser (> 4 W) is coherently combined to drive the clock transition at > 8 W. In the DM mode, the two lasers are offset-locked to the frequency comb to perform AC-Stark-shift-compensated Bragg transitions. This talk will cover this laser system’s architecture, design principles, some preliminary test results.
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