A 1073.8 nm Nd:YAG laser using a Fabry-Perot band-pass filter as output mirror

Abstract

We designed and fabricated a dielectric Fabry-Perot filter (FPF) with pass band of 24 nm as the output coupler of a [111]-cut Nd:YAG laser to restrain the strong emission near 1064 nm and obtain a 1073.8 nm lasing output with a planoplane resonator cavity. The threshold pump power is about 2.9 W. The maximum output power is 261.7 mW at pump power of 5.3 W and the slope efficiency is 12.1 %. Passively Q-switched 1073.8 nm laser is realized using a [100]-cut Cr:YAG crystal as the saturable absorber. The full width at half maximum (FWHM) pulse duration of 75.7 ns and pulse repetition rate of 4.23 kHz is achieved at pump power of 5.3 W. The design principle of the Fabry-Perot filter used as output mirror is discussed and the advantages of the method are summarized.

Orthogonally polarized dual-wavelength laser based totally on intrinsic birefringence of the gain crystal

“…FPFs have been used as output couplers to obtain the lasing of transitions with small stimulated cross sections in Nd:YAG crystal lasers, such as 1123 [30] and 1074 nm [31]. The cavity is simple and compact.…”