Shukai Tang

Combustion Parametric Optimization for All Gas-Phase Iodine Laser Driven by D2/NF3/DCl Combustion and Self-Pooling of NCl(a) Catalyzed by NF(a)/NF(b)

Combustion parametric optimization for all gas-phase iodine laser driven by D(2)/NF(3)/DCl combustion was performed, and an energy transfer channel called self-pooling of NCl(a) catalyzed by NF(a)/NF(b) was presented. The results show that a flow rate ratio of NF(3) and D(2) of 0.8 to 1.5 and DCl and D(2) of >1.5 is necessary for high efficiency of Cl atoms generation. The results also show that NF(a) and NF(b) from the reaction of HN(3) and residual F atoms or from the D(2)/NF(3) combustion have a serious effect on the generation and transport of NCl(a) via the NF(a) direct quenching of NCl(a) or via the catalysis of NF(a)/NF(b) on NCl(a) self-pooling. The generation of NF can be avoided if sufficient DCl was used and the NF(3)/D(2) flow rate ratio was properly controlled.

Experimental study on an all gas-phase iodine laser using microwave discharge of Cl2/He as a Cl atoms source.

Microwave discharge of a Cl2/He mixture as a simple, clean and efficient Cl atom generator was used for an all gas-phase iodine laser study. Sufficient NCl(a1Delta) was produced through the reaction of HN3+2Cl-->NCl(a1Delta)+HCl+N2. The energy transfer reaction of I(2P3/2)+NCl(a1Delta)-->I(2P1/2)+NCl(X3Sigma) was observed. A population inversion was observed directly by using a 1315 nm tunable diode laser by scanning the entire line shape of the (3,4) hyperfine transition of iodine, and a small signal gain of 5x10(-5) cm-1 was obtained.