Generation of picosecond pulses by lasers with distributed feedback at a wavelength of 1064 nm

The mode of generation of picosecond optical pulses in the spectral range near 1064 nm by semiconductor lasers with distributed feedback and active region based on an InGaAs/GaAs quantum well has been studied. In the gain-modulation mode, the width of laser pulses decreases from 150 to 35 ps as the temperature increases from 5 to 50$^\circ$C. It was demonstrated that there is a temperature range in which the pulse width is at a minimum, 35 ps, at a full spectrum width at half-maximum of 70 pm. The laser was mounted in a hermetically sealed butterfly case, which enabled a temperature tuning of the wavelength within 3 nm in the generation mode of pulses with width less than 45 ps. The peak output power was 0.4 W at the outlet of a single-mode fiber, with the polarization preserved.