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Short-pulse CO(2) laser for photochemical studies.

A W Pasternak, D J James, J A Nilson

|April 8, 2010

Summary

A new carbon dioxide (CO(2)) laser system generates tunable, repeatable laser pulses with adjustable widths. This system achieves a high energy contrast ratio, making it ideal for photochemical research.

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Area of Science:

Optics and Photonics
Laser Physics
Physical Chemistry

Background:

Carbon dioxide (CO(2)) lasers are widely used in various scientific applications.
Precise control over laser pulse characteristics is crucial for advanced research, particularly in photochemistry.
Existing laser systems may have limitations in tunability, pulse width selection, or energy contrast.

Purpose of the Study:

To develop and describe a novel line-tunable carbon dioxide (CO(2)) laser system.
To demonstrate the capability of producing repeatable laser pulses with selectable widths.
To achieve a high energy contrast ratio for enhanced experimental control.

Main Methods:

Implementation of a line-tunable CO(2) laser architecture.
Integration of a pulse selection mechanism for variable pulse widths (2-60 nanoseconds).
Optimization of laser parameters to achieve high energy contrast ratios in both P and R branches.

Main Results:

The developed CO(2) laser system successfully produced repeatable laser pulses.
Selectable pulse widths ranging from 2 to 60 nanoseconds were achieved.
A minimum energy contrast ratio of 10 was consistently obtained in the 9- and 10-micrometer bands.

Conclusions:

The described line-tunable CO(2) laser system offers precise control over pulse characteristics.
The high energy contrast ratio makes the system a valuable tool for photochemical studies.
This laser system advances the capabilities for conducting detailed photochemical investigations.