Continuously tunable pulsed Ti:Sa laser self-seeded by an extended grating cavity

Area of Science:

• Laser physics
• Optical engineering

Background:

• Traditional grating lasers face limitations in output power and linewidth control.
• High pump power in grating lasers can cause thermal damage to optical components.

Purpose of the Study:

• To demonstrate and characterize a continuously tunable titanium:sapphire laser with enhanced power and narrow linewidth.
• To investigate a novel dual-oscillator configuration for improved laser performance.

Main Methods:

• A partially reflecting mirror was inserted into a classic grating laser cavity to create two coupled oscillators.
• A broadband power oscillator and a narrowband oscillator with a prism beam expander and diffraction grating were utilized.
• The grating cavity oscillation was coupled into the power oscillator for power enhancement.

Main Results:

• The modified laser achieved power-enhanced, narrow-linewidth oscillation.
• Output power was significantly increased without considerable linewidth broadening compared to classic grating lasers.
• The configuration allowed for higher pump power due to reduced thermal load on the grating.

Conclusions:

• The dual-oscillator titanium:sapphire laser design offers a simple yet effective method for increasing output power.
• This approach overcomes limitations of conventional grating lasers, enabling higher pump power and improved thermal management.
• The tunable, narrow-linewidth laser system has potential applications in various scientific fields requiring high-power laser sources.