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Room-temperature continuous-wave operation of a Ti:Al2O3 laser
A Sanchez1, R E Fahey, A J Strauss
1Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, Massachusetts 02173-0073, USA.
Optics Letters
|September 5, 2009
Summary
Continuous-wave operation of a titanium-doped sapphire (Ti:Al2O3) laser at room temperature was achieved for the first time. This breakthrough in laser technology demonstrates efficient laser emission and low cavity loss.
Area of Science:
- Solid-state laser technology
- Laser physics
- Materials science
Background:
- Titanium-doped sapphire (Ti:Al2O3) lasers are tunable solid-state lasers.
- Previous Ti:Al2O3 laser operations required cryogenic cooling.
- Achieving room-temperature operation is a significant advancement.
Purpose of the Study:
- To demonstrate room-temperature continuous-wave (cw) operation of a Ti:Al2O3 laser.
- To characterize the laser performance, including output power and efficiency.
- To determine cavity losses and absorption coefficients at room temperature.
Main Methods:
- Utilized an all-line Argon-ion laser to pump the Ti:Al2O3 laser rod.
- Employed output couplers of 0.7% and 4.9% transmission.
- Measured laser thresholds and slope efficiencies to calculate performance parameters.
Main Results:
- Achieved room-temperature cw laser emission at 770 nm.
- Maximum output power reached 1.6 W.
- Determined internal quantum efficiency of (64 ± 10)% and round-trip cavity loss of (2.4 ± 0.5)%.
Conclusions:
- Room-temperature cw operation of Ti:Al2O3 lasers is feasible.
- Low cavity loss was achieved, enabling efficient laser performance.
- The low absorption coefficient at 770 nm is advantageous for laser operation.
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