Compact and Efficient 3.2-W Diode-Pumped Nd:YVO(4)/KTP Green Laser

Area of Science:

• Laser Physics
• Materials Science

Background:

• Achieving stable single-frequency operation in solid-state lasers is crucial for various applications.
• Diode-pumped solid-state (DPSS) lasers offer efficient and compact laser sources.

Purpose of the Study:

• To demonstrate a simple method for achieving single-frequency operation in a fiber-coupled diode-pumped Nd:YVO(4)/KTP green laser.
• To optimize the laser cavity for efficient single-mode output.

Main Methods:

• Utilized a short standing-wave linear cavity design.
• Employed fiber-coupled diode pumping.
• Incorporated Neodymium-doped Yttrium Orthovanadate (Nd:YVO(4)) as the gain medium and Potassium Titanyl Phosphate (KTP) as the nonlinear crystal.

Main Results:

• Generated a single-mode output with 3.2 W of green power.
• Achieved this output with a pump power of 12.6 W, resulting in a conversion efficiency of 25.4%.
• Single-frequency operation was confirmed.

Conclusions:

• The combined action of Nd:YVO(4)'s anisotropic emission cross-section and the KTP crystal's birefringent filtering effect enables stable single-frequency operation.
• This method provides a straightforward approach to high-efficiency single-frequency green laser generation.