Effect of energy competition between spontaneous emission and injected seed signal to injection locking master-slave lasers is analyzed.The injected seed laser is a monolithic non-planar single frequency ring laser.The slave laser is a Q-switched resonator with high repetition frequency.Single frequency pulse laser having a pulse width of 40?ns and an output power higher than 5?mJ is obtained.Locking probability is tested under conditions of different frequency, power and pumped energy of the slave laser.It...