High-power tunable single- and multi-wavelength diode-pumped Nd:YAP laser in the ^4F_3/2 → ^4I_11/2 transition

Abstract

We experimentally explore the fluorescent spectrum of the Nd:YAP crystal to manifest the feasibility of tunable single- and multi-wavelength operations in the (4)F3/2 → (4)I11/2 transition. An intracavity etalon is subsequently exploited to effectively select spectral lines at 1073, 1080, and 1084 nm with the tunabilities of 0.56, 1.13, and 0.1 nm, respectively. We also experimentally obtain multi-wavelength oscillations among various intermanifold lines in the Nd:YAP crystal with the output powers on the order of several watts for each group. Employing the Cr(4+):YAG crystal to realize the passively Q-switched operation, the maximum average output powers as high as 2.3 and 3.5 W for 1073 and 1080 nm are obtained. The corresponding pulse energies at 1073 and 1080 nm are up to 177 and 159 μJ, respectively.

Q-Switched Yb:YAG/YVO4 Raman Laser

“…The time-delay between two pulses was similar to the phenomenon has been reported in Ref. [24]. The FWHM of the two pulses was 37.3 ns.…”

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

“…During the early days of lasers, the research of Nd:YAP mainly focused on the generation of single wavelength lasers [19][20][21][22][23]. Recently, dual-wavelength Nd:YAP lasers have attracted the attention of researchers [10,13,[24][25][26][27]. Usually an angle-tuned etalon is used to generate dual-wavelength lasers at wavelengths such as 1073 and 1080 nm [25], 1341 and 1339 nm [13] and 1079 and 1099 nm [27].…”

“…Recently, dual-wavelength Nd:YAP lasers have attracted the attention of researchers [10,13,[24][25][26][27]. Usually an angle-tuned etalon is used to generate dual-wavelength lasers at wavelengths such as 1073 and 1080 nm [25], 1341 and 1339 nm [13] and 1079 and 1099 nm [27]. As Nd:YAP is a biaxial material with different emission spectra along different directions of crystallographic axes [23,28,29], it's advantageous to generate an orthogonally polarized dual-wavelength output.…”

Tunable laser operations in a Nd-doped SrLaAlO4 crystal

“…To date, several Nd 3+ -doped disordered crystals, such as Nd:SBN, 10 Nd, La:SrF 2 (ref. 11) and Nd:YAP, 12 have been realized for tunable laser operations. In addition, the Nd:SrLaAlO 4 (Nd:SLA) crystal, rst grown by the M. Berkowski group, is also a promising disordered crystal with a tetragonal K 2 NiF 4 structure.…”