High repetition rate pulsed laser of twin wavelengths from KTiOPO_4 optical parametric oscillation
High　repetition　rate　pulsed　laser　of　twin　wavelengths　from　KTiOPO4　optical　parametric　oscillation

In this paper, some key techniques of KTiOPO_4 optical parametric oscillation (OPO) laser with repetitive frequencies and twin wavelengths output have been analysed theoretically and studied experimentally in detail. An intracavity optical parametric oscillator (IOPO) has been applied. Operating under 20Hz, laser output energy of more than 38mJ with twin wavelengths 1.57μm and 1.06μm has been achieved. Results of the experiments agree well with the theoretical discussion.