Continuous-wave single-mode stimulated emission from a semiconductor injection laser with a nonselective resonator

It is shown that continuous generation of cw single-mode radiation with a power of up to 0.3 W and line width of less than 400 MHz may be achieved from a liquid-nitrogen-cooled homojunction injection laser. A loss mechanism for single-mode operation is discussed and calculations of the maximum single-mode power are presented. These do not contradict the experimental results.