A numerical analysis is presented with a combustion-driven 16 μm CO
2gas dynamic laser operating on liquid fuel and liquid oxidizer constituted of benzene (C
6H
6) and nitrous oxide (N
2O), respectively. Adopting a sharp-edged nozzle with an area ratio of 100, optimization of equivalence ratio φ, reservoir pressure P
0, and nozzle throat height

was performed by considering conditions of no steam condensation and exhausting the combustion gas to the atmosphere. The analysis showed that the maximum value of

m
-1for small-signal gain and

mJ/(l . atm . pulse) for available specific energy would be attainable with the

line of the (02
00)-(01
10) transition.