Wavelength beam combining of laser diode array by wavelength-chirped volume Bragg grating external cavity - Details

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Abstract：

With　an　external　cavity　containing　a　wavelength-chirped　volume　Bragg　grating,　multi-wavelength　beam　combining　is　realized　with　a　standard　bar　of　49　emitters.　The　width　of　the　emitter　is　100　μm,　and　the　fill　factor　is　0.5.　Beam　quality　factor　of　6　for　both　the　fast　axis　and　the　slow　axis　is　achieved　at　CW　operating,　and　a　nearly　round　output　spot　of　high　intensity　with　a　peak　power　of　11.2　W　is　gotten.　The　efficiency　at　the　maximum　operating　current　is　about　30%.　An　efficiency　of　64%　at　maximum　working　current　is　proven　in　a　more　detailed　experimental　study.　The　technical　advantages　and　possible　applications　are　discussed.

Keyword：

Semiconductor lasers Diffraction gratings Efficiency Bragg gratings

Author Community：

[ 1 ] [Liu, Bo]College of Laser Engineering, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Zhang, Xue]College of Laser Engineering, Beijing University of Technology, Beijing 100022, China
[ 3 ] [Han, Jun-Ting]College of Laser Engineering, Beijing University of Technology, Beijing 100022, China
[ 4 ] [Hui, Yong-Ling]College of Laser Engineering, Beijing University of Technology, Beijing 100022, China
[ 5 ] [Jiang, Meng-Hua]College of Laser Engineering, Beijing University of Technology, Beijing 100022, China
[ 6 ] [Li, Qiang]College of Laser Engineering, Beijing University of Technology, Beijing 100022, China