2016/02/29 by Brendan Saxberg, Benjamin Plotkin-Swing, Subhadeep Gupta · 1 citation
Physics and Astronomy · #physics.atom-ph #physics.ins-det #physics.optics
paper · pdf · doi:10.1063/1.4953589
published as Review of Scientific Instruments, 87, 063109 (2016) · 5 pages, 7 figures
arxiv created 2016/06/14 · arxiv updated 2016/06/15
We report on a device to electronically stabilize the optical injection lock of a semiconductor diode laser. Our technique uses as discriminator the peak height of the laser's transmission signal on a scanning Fabry-Perot cavity and feeds back to the diode current, thereby maintaining maximum optical power in the injected mode. A two-component feedback algorithm provides constant optimization of the injection lock, keeping it robust to slow thermal drifts and allowing fast recovery from sudden failures such as temporary occlusion of the injection beam. We demonstrate the successful performance of our stabilization method in a diode laser setup at 399 nm used for laser cooling of Yb atoms. The device eases the requirements on passive stabilization and can benefit any diode laser injection lock application, particularly those where several such locks are employed.