Abstract
Gain characteristics of highly pressurized NH3 gas have been studied in detail for amplification of tunable radiation from a Pb1-x Te diode laser. The gain of optically pumped media was measured as a function of pressures of NH3 and buffer gases up to 10 atm. The amplification factor obtained through a cell was found to be more than ten times. A continuously extended width of the gain profile was approximately 30 GHz. Comparison between N2 and He as a buffer gas has also been made.
