Master-oscillator power-amplifier scheme for efficient green-light generation in a planar MgO:PPLN waveguide.

Area of Science:

• Laser physics and nonlinear optics.
• Materials science for nonlinear optical devices.

Background:

• Efficient generation of visible laser light is crucial for various applications.
• Planar periodically poled magnesium-oxide-doped periodically poled lithium niobate (MgO:PPLN) waveguides offer potential for compact light sources.

Purpose of the Study:

• To develop an efficient master-oscillator power-amplifier (MOPA) scheme for green light generation.
• To demonstrate continuous-wave (cw) green light output using a planar MgO:PPLN waveguide.

Main Methods:

• A master-oscillator power-amplifier (MOPA) system was designed, integrating a tapered semiconductor amplifier with a fiber-grating-stabilized laser diode.
• The MOPA output was coupled into a planar MgO:PPLN waveguide for nonlinear frequency conversion.
• Continuous-wave (cw) output power was measured.

Main Results:

• The developed MOPA scheme successfully generated green light.
• A continuous-wave (cw) green light output power of 346 milliwatts was achieved.
• The efficiency of green light generation in the planar MgO:PPLN waveguide was demonstrated.

Conclusions:

• The novel MOPA scheme is effective for efficient green light generation.
• Planar MgO:PPLN waveguides are suitable for high-power visible light sources.
• This work contributes to the development of compact and efficient green laser systems.