Control of cascading in multiple-order Raman lasers

Area of Science:

• Laser physics
• Nonlinear optics

Background:

• Intracavity Raman lasers can generate visible light through stimulated Raman scattering.
• Raman cascade, where multiple Stokes orders are generated, can lead to power loss at desired wavelengths.
• Controlling the Raman cascade is crucial for efficient visible light generation.

Purpose of the Study:

• To explore a method for controlling Raman cascade in intracavity Raman lasers.
• To maximize output power at desired visible wavelengths.
• To suppress unwanted Stokes orders and prevent their buildup.

Main Methods:

• Utilizing sum-frequency generation (SFG) to suppress unwanted Stokes orders.
• Implementing SFG to control the Raman cascade process.
• Analyzing output power at specific visible wavelengths (532 nm, 559 nm, 586 nm).

Main Results:

• Demonstrated significant increases in output power at targeted visible wavelengths.
• Achieved a 40% increase in output power at 532 nm.
• Observed a 42% increase at 559 nm and a 67% increase at 586 nm.

Conclusions:

• Sum-frequency generation is an effective method for controlling Raman cascade.
• This control leads to enhanced output power at desired visible wavelengths.
• The method shows promise for efficient visible light generation using intracavity Raman lasers.