Coherent beam combining of multiple laser beams is an attractive approach for scaling up the output power from fiber laser sources while maintaining their beam quality. A key challenge in such a beam combining approach is the need for active phase synchronization between the different amplifier arms. Stochastic parallel gradient descent (SPGD) algorithm is a popular method for synchronizing the phase across a large number of sources as it has a relatively simple hardware requirement and is scalable. In this work, we demonstrate a fiber-optic Mach-Zehnder Interferometer (MZI) with stabilized output using the SPGD algorithm implemented in a commercial controller board. We investigate the implementation of the SPGD algorithm and study key performance factors such as convergence time and output signal noise.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.