Laser diode array beam shaping based on parallel glass plate

In order to meet the needs of high power balanced laser beam, taking laser diode bar and stack as models, parallel glass plates were used in beam segmentation and rearrangement based on their beam displacement property. The system was simulated in Zemax. The initial divergence angels in diode laser bar were 40and 10. Before shaping, the beam parameter products of the collimated beam in fast axis and slow axis were 0.455 2 mmmrad and 20.484 mmmrad respectively, which had a great difference in beam quality. After shaping system, the beam parameter products in fast axis and slow axis were 2.731 2 mmmrad and 3.414 0 mmmrad respectively, with a better balanced performance. Similarly, parallel glass plates were used to eliminate the emitting dead zone of laser diode (LD) stack , increasing the beam energy density. After shaping system, the beam parameter products in fast axis and slow axis were 7.002 mmmrad and 10.242 mmmrad respectively, the coupling efficiency was 90.13%.