Liang, Wei and Satyan, Naresh and Yariv, Amnon and Kewitsch, Anthony and Rakuljic, George and Aflatouni, Firooz and Hashemi, Hossein and Ungar, Jeffrey (2007) Coherent power combination of two Master-oscillator-power-amplifier (MOPA) semiconductor lasers using optical phase lock loops. Optics Express, 15 (6). pp. 3201-3205. ISSN 1094-4087 http://resolver.caltech.edu/CaltechAUTHORS:LIAoe07
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Using heterodyne Optical Phase-Locked Loops (OPLLs), two 1W high power 1550 nm master-oscillator-power-amplifier (MOPA) semiconductor lasers operating as current controlled oscillators are phase-locked to a 1 mW reference laser. The signals of the two MOPAs are then coherently combined and their mutual coherence is studied. In each OPLL, the acquisition range is increased to +/-1.1GHz with the help of an aided- acquisition circuit. Control of the phase of a single slave MOPA is demonstrated using a RF phase shifter. The differential phase error between two MOPAs locked to the common reference laser is typically 22 degrees.
|Additional Information:||© 2007 Optical Society of America. Received 10 January 2007; revised 4 March 2007; accepted 11 March 2007. The authors wish to acknowledge the support of DARPA’s MTO office (J. Mangano, M. Stickley) and T. Salvi of Kirtland Air Force Base.|
|Subject Keywords:||Diode laser arrays; Coherence; Distributed feedback lasers|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||19 Mar 2007|
|Last Modified:||26 Dec 2012 09:33|
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