Fig. 1. Laser circuit. M1 and M2, cavity mirrors; AOM, acousto-optic modulator; Nd:YAG, active element; 0, zeroth-order diffraction beam; 1, first-order diffraction beam.

Fig. 2. Oscillograms of the output laser radiation at k_d ≈ 7%. (a) ΔL = 0, (b) ΔL = 80 µm.

Fig. 3. Oscillogram of a lasing pulse at a wavelength of 1.064 µm in QML mode. The division along the abscissa axis is 20 ns.

Fig. 4. Autocorrelation function in QML generation mode.

Fig. 5. Schematic of a setup for obtaining superluminescent generation tunable in the 620 nm region. 1, Nd:YAG pump laser; 2, collimator; 3, focusing lens; 4, PPLN crystal (50 mm length, polarization period 29.5 µm, ee-e phase synchronism); 5, selective mirror (HR at 3200-3850 nm, HT at 1050–1700 nm); 6, focusing lens; 7, LBO crystal (15 mm length, Θ = 90°, φ = 0°, ee-o synchronism); 8, prism (TF10); 9, diaphragm; 10 and 11, measuring equipment.