A Compact, Widely Tunable Intracavity PPLN Optical
Parameter Oscillator Driven by an Nd:YAG/Cr:YAG Composite
Crystal Laser¹

X.-Q. Yang^{a, b,} *, J.-F. Yang^b, B.-T. Zhang^b, and S.-D. Liu^b

^a Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics,
Qufu Normal University, Qu’fu 273165, China

^b State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University,
Ji’nan 250100, China

*e-mail: xiuqinyang@126.com

Received September 26, 2011; in final form, October 12, 2011; published online February 6, 2012

Abstract—Based on periodically poled lithium niobate (PPLN), a mini intracavity optical parameter oscillator
(IOPO) driven by an diode-end-pumped composite Nd³⁺:YAG/Cr⁴⁺:YAG laser was demonstrated. The PPLN
wafer has 20 domain reversal periods from 27.8 to 31.6 m with a step of 0.2 m between the neighbor periods.
The output signal laser of OPO can be widely tunable in the range of 1402–1676 nm by changing the period at
a certain temperature of 50C. Under the diode pump power of 14 W, the maximum average output power of
600 mW at 1534 nm with pulse width of 2.0 ns and repetition rate of 16 kHz was obtained, corresponding to a
peak power of 18.7 kW and a single pulse energy of 37.5 J, respectively.

DOI: 10.1134/S1054660X12030243

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