Author/Authors :
Wang، D. نويسنده , , Talbot، C. L. نويسنده , , Friese، M. E. J. نويسنده , , Brereton، I. نويسنده , , Heckenberg، N. R. نويسنده , , Rubinsztein-Dunlop، H. نويسنده ,
Abstract :
We present theory and simulations for a spectral narrowing scheme for laser diode arrays (LDAs) that employs optical feedback from a diffraction grating. We calculate the effect of the so-called smile of the LDA and show that it is possible to reduce the effect by using a cylindrical lens set at an angle to the beam. The scheme is implemented on a 19-element LDA with smile of 7.6 µm and yields frequency narrowing from a free-running width of 2 to 0.15 nm. The experimental results are in good agreement with the theory.
