Lasers emitting at wavelengths of 780-850 nm with an output power up t
o 20 mW in the single-frequency regime were developed. At output power
s up to 5 mW there was no mode 'hopping' and the experimental characte
ristics of the lasers agreed well with theoretical predictions. The mi
nimum width of the emission line of these lasers was 35 MHz and the ra
tio of the powers of the lasing and adjacent modes exceeded 20 dB.