Passive Q-switched laser and method for optimizing its operation

摘要

The passive Q-switched laser is disposed between a pumping source 1 that outputs pumping light and a pair of reflecting mirrors 5a and 5b constituting an optical resonator, and is excited by pumping light from the pumping source to emit laser light. A laser medium 3, a saturable absorber 4 disposed between the pair of reflecting mirrors and increasing in transmittance with absorption of laser light from the laser medium, and an output and pulse width of an excitation source for a repetition frequency The matrix table 22 storing the optimum values in association with each other, and referring to the matrix table, the output of the excitation source and the optimum value of the pulse width corresponding to the input repetition frequency are read, and the output of the read excitation source And a control unit 21 that controls the excitation source so as to obtain an optimum value of the pulse width.