Application of optical phase lock loops in coherent beam combining

Wei Liang; Naresh Satyan; Firooz Aflatouni; Amnon Yariv; Anthony Kewitsch; George Rakuljic; Hossein Hashemi

doi:10.1117/12.764378

25 February 2008 Application of optical phase lock loops in coherent beam combining

Wei Liang, Naresh Satyan, Firooz Aflatouni, Amnon Yariv, Anthony Kewitsch, George Rakuljic, Hossein Hashemi

Proceedings Volume 6873, Fiber Lasers V: Technology, Systems, and Applications; 68731Y (2008) https://doi.org/10.1117/12.764378
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

Abstract

Coherent Beam Combining (CBC) technology holds the promise of enabling laser systems with very high power and near-ideal beam quality. In this work we propose and demonstrate a novel CBC servo system using optical phase lock loops for phase control. This servo system is based on entirely electronic components and, consequently, can be considerably more compact and less expensive compared to servo systems made of optical phase/frequency shifters. In the proof-of-concept experiments we have combined two 100mW 1064nm commercial semiconductor lasers with the filled-aperture approach at an efficiency of 94% and also two 50mW 1538nm commercial semiconductor lasers using the tiled-aperture approach with a strehl ratio of 0.9. In addition, we also present a theoretical consideration of the influence of various sources of noise on the combining efficiency of a cascaded filled-aperture CBC system.

Citation Download Citation

Wei Liang, Naresh Satyan, Firooz Aflatouni, Amnon Yariv, Anthony Kewitsch, George Rakuljic, and Hossein Hashemi "Application of optical phase lock loops in coherent beam combining", Proc. SPIE 6873, Fiber Lasers V: Technology, Systems, and Applications, 68731Y (25 February 2008); https://doi.org/10.1117/12.764378

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

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.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available