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Efficient and tunable continuous-wave diode-pumped Yb3+:Ca4GdO(BO3)3 laser.

F Augé¹, F Balembois, P Georges

¹Laboratoire Charles Fabry de l'Institut d'Optique, Orsay, France.

|February 29, 2008

Summary

Diode pumping of Ytterbium-doped Gadolinium Calcium Oxyborate (Yb:GdCOB) crystals achieved high slope efficiency and significant power output. Laser performance remained stable across a range of temperatures, demonstrating Yb:GdCOB

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Area of Science:

Laser physics
Solid-state materials
Optical engineering

Background:

Ytterbium-doped materials are crucial for developing efficient solid-state lasers.
Gadolinium Calcium Oxyborate (GdCOB) is a promising host crystal for rare-earth doping.
Diode-pumped lasers offer advantages in efficiency and compactness.

Purpose of the Study:

To investigate the laser performance of a Ytterbium-doped Gadolinium Calcium Oxyborate (Yb:GdCOB) crystal when diode-pumped.
To evaluate the efficiency, output power, and tunability of the Yb:GdCOB laser system.
To assess the impact of temperature on the laser's performance characteristics.

Main Methods:

Diode pumping of a Yb:GdCOB crystal.
Characterization of laser output power and slope efficiency using various output couplers.

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Measurement of laser tunability across different spectral ranges.

Assessment of laser performance at different operating temperatures (6°C and room temperature).

Main Results:

First-time diode-pumped operation of Yb:GdCOB crystal achieved.
A maximum slope efficiency of 47.5% and 191 mW output power at 1050 nm were obtained at 6°C.
Laser performance showed minimal degradation at room temperature, with 180 mW output power.
Tunability from 1035 to 1088 nm was achieved with a 1.7% output coupler, and 100-nm tunability with low-transmission output coupling.

Conclusions:

Diode-pumped Yb:GdCOB lasers demonstrate high efficiency and stable performance.
The Yb:GdCOB crystal is a viable material for efficient diode-pumped laser applications.
The laser system exhibits excellent tunability, making it suitable for various spectroscopic and optical applications.