Millisecond pulse length two-dimensional diode laser arrays

A millisecond-pulse-length 5-bar 2D diode laser array was fabricated and operated, demonstrating 1-msec pulse widths at 40 Hz. Peak output power was 250 W at a conversion efficiency of 36 percent. The wavelength spectrum integrated over the current pulse exhibited shifts to longer wavelengths and broadening on the order of 1 nm as the pulse width was increased from 0.2 msec to 1 msec at constant duty factor.