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Room-temperature 1.643-µm Er(3+):Y(3)Sc(2)Ga(3)O(12) (Er:YSGG) laser.

K Spariosu, M Birnbaum, M Kokta

|November 12, 2010

Summary

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Researchers achieved laser operation at 1.643 µm using an Erbium-doped Yttrium Scandium Gallium Garnet (Er:YSGG) crystal. This demonstrates a new possibility for solid-state laser applications at this specific wavelength.

Area of Science:

Laser Physics
Materials Science
Solid-State Lasers

Background:

Erbium-doped materials are crucial for developing lasers in the 1.5-1.6 µm range.
Yttrium Scandium Gallium Garnet (YSGG) is a potential host for rare-earth ions.
Efficient laser operation in Er:YSGG at 1.643 µm has not been widely reported.

Purpose of the Study:

To demonstrate laser operation at 1.643 µm in an Erbium-doped Yttrium Scandium Gallium Garnet (Er:YSGG) crystal.
To investigate the performance characteristics of the Er:YSGG laser at room temperature.
To explore the potential of Er:YSGG as a gain medium for specific laser applications.

Main Methods:

End-pumping a 1-cm long, 0.7% Er, 3% Yb, 1% Cr doped YSGG crystal with an Er:glass laser operating at 1.532 µm.

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Utilizing an external cavity configuration for laser oscillation.

Operating the laser at a temperature of 300 K (room temperature).

Main Results:

Successful laser operation was achieved at a wavelength of 1.643 µm, corresponding to the (4)I(13/2)-(4)I(15/2) transition in Er3+.
The Er:YSGG laser demonstrated a threshold energy of 18 mJ.
A slope efficiency of 10% was recorded for the laser output.

Conclusions:

The study successfully demonstrates laser action at 1.643 µm in Er:YSGG at room temperature.
The achieved threshold and slope efficiency indicate the viability of Er:YSGG for laser applications.
This work contributes to the development of novel solid-state lasers operating in the eye-safe spectral region.