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Discretely tunable multiwavelength diode-pumped Nd:YALO laser.

P Poirier, F Hanson

|November 12, 2010

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A diode-pumped Nd:YALO laser was developed for tunable UV output. This laser system achieved significant energy levels at 266 and 275 nm, demonstrating its potential for various applications.

Area of Science:

Lasers and Photonics
Quantum Electronics
Solid-State Lasers

Background:

Diode-pumped solid-state lasers offer efficient and compact solutions.
Q-switching and frequency conversion techniques are crucial for generating specific wavelengths.
Thermal lensing effects can impact laser performance, especially in side-pumped geometries.

Purpose of the Study:

To report the operation of a tunable, Q-switched, quadrupled diode-pumped Nd:YALO laser.
To characterize the laser's output energy at fundamental and UV wavelengths.
To investigate thermal lensing effects in the Nd:YALO rod.

Main Methods:

Utilized a Q-switched, diode-pumped Neodymium-doped Yttrium Aluminum Lanthanate (Nd:YALO) laser.
Employed intracavity frequency doubling to generate green and yellow light.

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Used external frequency quadrupling to produce ultraviolet (UV) radiation.

Analyzed astigmatic focal lengths resulting from thermal lensing.

Main Results:

Achieved 5.4 mJ at 532 nm and 4.4 mJ at 550 nm via intracavity frequency doubling at a 600 Hz repetition rate.
Generated 0.28 mJ at 266 nm and 0.24 mJ at 275 nm through external frequency quadrupling.
Presented data on astigmatic focal lengths attributed to thermal lensing in the side-pumped Nd:YALO rod.

Conclusions:

Demonstrated a discretely tunable Nd:YALO laser system operating in the UV range.
The laser achieved moderate-to-high repetition rates with significant output energies.
Thermal lensing effects were identified as a key factor influencing laser performance.