Diode-pumped simultaneous multi-wavelength linearly polarized Nd:YVO₄laser at 1062, 1064 and 1066 nm

Abstract

We report on a diode-end-pumped simultaneous multiple wavelength Nd:YVO 4 laser. Dual-wavelength laser is achieved at a π-polarized 1064 nm emission line and a σ-polarized 1066 nm emission line with total maximum output power of 1.38 W. Moreover, tri-wavelength laser emission at the π-polarized 1064 nm emission line and σ-polarized 1062 and 1066 nm emission lines can also be obtained with total maximum output power of about 1.23 W, for the first time to our knowledge. The operation of such simultaneous dual-and tri-wavelength lasers is only realized by employing a simple glass etalon to modulate the intracavity losses for these potential lasing wavelengths inside of an intracavity polarizer, which therefore makes a very compact two-mirror linear cavity and simultaneous orthogonal lasing possible. Such orthogonal linearly polarized multi-wavelength laser sources could be especially promising in THz wave generation and in efficient nonlinear frequency conversion to visible lasers.

Efficient Trichromatic Nd:YLF Laser Emitting at 1047 nm, 1053 nm and 1314 nm

“…This capability not only enriches the versatility of these lasers, but also expands their utility across various fields. A diverse range of Nd 3+ -doped lasers have demonstrated the ability to emit triple-wavelength (multichromatic) emissions, with Nd:YGG emitting at 1062 + 1060 + 1058 nm [32], Nd:SYSO emitting at 1075 + 1076 + 1078 nm [33], Nd:YVO emitting at 1062 + 1064 + 1066 nm [34], and Nd:YAG with emissions of 1064 + 1319 + 1338 nm or even at 469 + 471 + 473 nm via frequency doubling and sum-frequency mixing [35,36]. So far, however, Nd:YLF lasers have only presented double-wavelength emission, such as 1314 + 1321 nm [37], 1047 + 1053 nm [38], and 1047 + 1314 nm [21], presenting trichromatic emission only through the use of nonlinear effects.…”

Efficient multiwavelength operation of a diode-pumped Nd:YAlO3 laser at 1064, 1072 and 1079 nm

“…Anisotropic active media allow obtaining effective and reliable triple-wavelength oscillation at the 4 F 3/2 → 4 I 11/2 transition, which was demonstrated in Nd:YVO 4 [52], Nd:SYSO [53], Nd:LSO [54], and Nd:YAlO 3 [41] lasers using an intracavity etalon and/or a birefringent filter.…”

Exploiting birefringent thermal lensing effect to manipulate polarization states of an Nd:YVO_4 self-mode-locked laser

“…To realize an orthogonally polarized dual-wavelength laser [13][14][15][16][17], it is prerequisite to balance the gain-to-loss conditions for the orthogonally polarized states. For a conventional acut Nd:YVO 4 crystal where the π-polarization (parallel to the crystallographic c axis) predominates the laser oscillation, an additional intracavity birefringent element [18][19][20] or a wedged gain crystal [21,22] is frequently required to balance the gain competition between the π-and σ-polarization (perpendicular to c axis) states. However, such schemes not only make the optical cavity sensitive to misalignment but also increase the intracavity loss which inevitably reduces the output efficiency.…”