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Diode-pumped mode-locked Yb(3+):Lu(2)O(3) ceramic laser.

M Tokurakawa, K Takaichi, A Shirakawa

|June 18, 2009

Summary

Researchers developed a new ytterbium-doped lutetium oxide (Yb3+:Lu2O3) ceramic laser. This diode-pumped, mode-locked laser generates ultrashort pulses, marking a significant advancement in laser technology.

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Area of Science:

Laser Physics
Materials Science
Optoelectronics

Background:

Development of efficient and compact laser systems is crucial for various scientific and industrial applications.
Ytterbium-doped materials are attractive for generating ultrashort pulses due to their favorable spectroscopic properties.
Ceramic laser materials offer advantages in scalability and thermal management compared to single crystals.

Purpose of the Study:

To demonstrate a diode-pumped passively mode-locked Yb3+:Lu2O3 ceramic laser.
To characterize the performance of such a laser system in terms of pulse duration, output power, and efficiency.
To establish a new platform for generating ultrashort laser pulses using Yb3+:Lu2O3 ceramics.

Main Methods:

Utilized a semiconductor saturable absorber mirror (SESAM) for passive mode-locking.

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Employed diode-laser pumping for efficient energy transfer.

Fabricated and characterized Yb3+:Lu2O3 ceramic samples for laser operation.

Main Results:

Achieved nearly transform-limited 357 fs pulses.
Operated at a center wavelength of 1033.5 nm.
Obtained a maximum average output power of 352 mW.
Reached a high slope efficiency of 32% with respect to absorbed pump power.
Observed a repetition rate of 97 MHz.

Conclusions:

Successfully demonstrated the first diode-pumped mode-locked Yb3+:Lu2O3 ceramic laser.
The results highlight the potential of Yb3+:Lu2O3 ceramics as a gain medium for ultrashort pulse generation.
This work paves the way for developing advanced laser sources for diverse applications.