Selectable two-wavelength Nd:YVO₄ Raman laser at 671 and 714 nm.

Area of Science:

• Optics and Photonics
• Laser Physics

Background:

• Continuous wave (CW) lasers are crucial for various scientific applications.
• Developing compact and efficient tunable laser sources remains an active research area.

Purpose of the Study:

• To develop a compact and efficient CW laser source with selectable dual wavelengths.
• To achieve tunable second harmonic generation (SHG) and sum frequency generation (SFG) for specific output wavelengths.

Main Methods:

• Utilized an Nd-doped and an undoped YVO4 crystal for fundamental and Raman wave generation.
• Employed a single Lithium Triborate (LBO) crystal with thermal tuning for selectable phase-matching.
• Implemented SHG of 1342 nm and SFG of 1342 nm and 1525 nm.

Main Results:

• Achieved selectable CW laser output at 671 nm and 714 nm.
• Obtained optimal output powers of 4.5 W at 671 nm and 1.8 W at 714 nm with 40 W pump power.
• Demonstrated efficient thermal tuning for phase-matching in the LBO crystal.

Conclusions:

• A compact and efficient CW laser source with selectable dual wavelengths (671 nm and 714 nm) has been successfully developed.
• The laser system exhibits practical utility for laser spectroscopy and other demanding applications.
• The thermal tuning approach offers a reliable method for wavelength selection in nonlinear optical processes.