Dual-wavelength self-mode-locked semiconductor disk laser

Dual-wavelength mode-locked lasers can be widely used in optical communication, pump-probe experiment, nonlinear frequency conversion, etc. In this paper, a dual-wavelength self-mode-locked semiconductor disk laser is reported for the first time, to best of our knowledge. A simple linear resonator formed by using high reflectivity distributed Bragg reflector at bottom gain chip, and an external output mirror; cavity length about 135 mm, with no need additional inserted elements. Based on Kerr effect medium soft aperture pump spot along fine adjustment intensity, mode-locking process started from free running stable self-mode-locking realized. The pulse width 4.3 ps, repetition rate 1.1 GHz, maximum power 323.9 mW, which corresponds peak 68 W. After mode locked, readily available blade, introduce wavelength-dependent loss different modes, resulting lager longer-wavelength smaller shorter-wavelength mode, as wavelength tuning element, into direction perpendicular axis resonator. By changing depth blade cavity, continuously tuned initial oscillating (longer-wavelength) shorter wavelength, equal intensity obtained specific position, continuous-wave maintained simultaneously. steady dual-wavelengths experiment are 951 961 nm, corresponding 32 mW. above outputs have good coherence since they stimulated radiations same chip. Meanwhile, relatively strictly meet coaxial conditions, these all advantages difference generation (DFG). DFG approximately 3.3 THz, radar, remote sensing, homeland security, counter-terrorism, atmospheric environmental monitoring otherareas.