Optical stabilization of voltage fluctuations in half-Josephson lasers
Kavli Institute of Nanoscience, Delft University of Technology - P.O. Box 5046, 2600 GA Delft, The Netherlands, EU
Received: 18 June 2013
Accepted: 17 July 2013
A recently proposed device, dubbed half-Josephson laser, provides a phase-lock between the optical phase and the superconducting phase difference between the leads of the device. In this paper we propose to utilize this phase-lock for the stabilization of voltage fluctuations, by two optical feedback schemes. The first scheme involves a single half-Josephson laser and allows to significantly decrease the diffusion coefficient of the superconducting phase difference. The second scheme involves a stable optical source and a fluctuating half-Josephson laser and permits quenching of the diffusion of the relative phase of the lasers. This opens up perspectives of the optical control of the superconducting phase and voltage fluctuations.
PACS: 85.25.Cp – Josephson devices / 07.50.Hp – Electrical noise and shielding equipment / 42.62.-b – Laser applications
© EPLA, 2013