Wavelength shift with a diode-pumped continuous-wave Yb:CALGO laser.

Area of Science:

• Laser Physics
• Materials Science

Background:

• Investigating Ytterbium-doped Calcium Gadolinium Aluminum Oxide (Yb:CALGO) lasers.
• Understanding emission wavelength dependence on crystal temperature.

Purpose of the Study:

• To investigate the relationship between crystal temperature and emission wavelength in a Yb:CALGO laser.
• To explain the observed wavelength shifts using a temperature-dependent model.

Main Methods:

• Diode-pumped continuous-wave laser operation.
• Measurement of output power and emission wavelength.
• Analysis using a temperature-dependent model.

Main Results:

• Maximum output power of 11 W achieved.
• Slope efficiency of 19.8% recorded.
• Emission wavelength shift from 1051.10 nm to 1054.72 nm observed with increased pump power, attributed to temperature changes.

Conclusions:

• The study provides the first investigation into temperature-dependent wavelength shifts in Yb:CALGO lasers.
• A generalized temperature-dependent model explains these shifts in quasi-three-level materials.