Room-temperature 3.4- mum Dy:BaYb(2)F(8) laser.

Area of Science:

• Laser Physics
• Materials Science
• Spectroscopy

Background:

• Rare-earth-doped fluoride crystals are promising for mid-infrared laser applications.
• Dysprosium (Dy3+) ions exhibit energy levels suitable for laser transitions in the 3-4 µm range.
• Achieving efficient room-temperature operation in this spectral region remains a challenge.

Purpose of the Study:

• To demonstrate a room-temperature laser based on the Dy3+ (6)H(13/2) - (6)H(15/2) transition.
• To investigate the potential for tunable laser operation in Dy:BaYb2F8 crystals.
• To characterize the performance of the developed laser system.

Main Methods:

• Utilized a Dy:BaYb2F8 crystal as the gain medium.
• Employed a pulsed 1.3-micrometer neodymium-doped yttrium aluminum garnet (Nd:YAG) laser for optical pumping.
• Measured the spontaneous emission spectrum of the relevant Dy3+ transition.

Main Results:

• Successfully demonstrated a room-temperature laser operation at 3.40 µm.
• Observed a broad spontaneous emission band for the (6)H(13/2) - (6)H(15/2) transition.
• The results suggest potential for continuous tunability from 3.0 to 3.4 µm.

Conclusions:

• The Dy:BaYb2F8 crystal is a viable material for mid-infrared laser generation at room temperature.
• The demonstrated laser opens possibilities for tunable sources in the 3-4 µm spectral range.
• Further optimization could lead to improved laser performance and broader tunability.