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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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High-power TEM(00) tunable laser system.

R Mahon, T J McLlrath, D W Koopman

|March 9, 2010

Summary

This summary is machine-generated.

A high-brightness tunable laser offers near-infrared and ultraviolet output. Its beam quality is influenced by dye gain profiles and frequency-doubling crystal sensitivity.

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Area of Science:

Laser physics
Nonlinear optics

Background:

Tunable lasers are crucial for various scientific applications.
High-power laser sources with specific output characteristics are in demand.

Purpose of the Study:

To describe a tunable laser system with high peak power and near single spatial mode operation.
To detail the laser's capabilities in both near-infrared and ultraviolet spectral regions.

Main Methods:

Utilized a 45-MW, 25-nsec duration tunable laser operating in the near-infrared.
Employed frequency-doubling techniques to generate ultraviolet output.
Investigated factors influencing beam diameter and divergence, including spatial gain profile and amplifier pumping.

Main Results:

Achieved a 7.5-MW ultraviolet output with a 20-nsec duration.
Demonstrated exceptional brightness due to a near single spatial mode.
Identified significant influence of oscillator dye medium gain profile and amplifier pumping on beam characteristics.

Conclusions:

The described tunable laser is a powerful source for applications requiring high brightness in both near-infrared and ultraviolet.
Optimizing dye gain and amplifier pumping is critical for controlling beam quality.
Frequency-doubling crystal angular sensitivity is a key factor for efficient UV generation.