We describe the theoretical modeling of the external-cavity operation of a phase-locked array of diode lasers in two configurations, the self-imaging cavity based on the Talbot effect and the angular-filtering cavity. Complex filtering functions, such as the transmission or reflection of a volume Bragg grating (VBG), may be introduced in the external-cavity description. Experiments with high-brightness diode laser arrays were also conducted. The experimental results are carefully analyzed with regard to the numerical simulations, and the beneficial effect of the spectral selectivity of VBGs is demonstrated.
© 2011 Optical Society of America
Lasers and Laser Optics
Original Manuscript: October 18, 2010
Revised Manuscript: March 1, 2011
Manuscript Accepted: March 2, 2011
Published: April 27, 2011
David Pabœuf, Deepak Vijayakumar, Ole Bjarlin Jensen, Birgitte Thestrup, Jun Lim, Slawomir Sujecki, Eric Larkins, Gaëlle Lucas-Leclin, and Patrick Georges, "Volume Bragg grating external cavities for the passive phase locking of high-brightness diode laser arrays: theoretical and experimental study," J. Opt. Soc. Am. B 28, 1289-1299 (2011)