5-J 1.8-microsec pulse 10-pps dye laser for combustion applications

Area of Science:

• Laser physics and spectroscopy
• Combustion science and diagnostics
• Optical engineering

Background:

• Spontaneous Raman scattering is a powerful diagnostic technique for in-situ species concentration and temperature measurements in combustion.
• Previous laser systems faced limitations in energy, pulse width, or tunability for complex combustion environments.
• The Combustion Research Facility requires robust and precise laser instrumentation for advanced combustion studies.

Purpose of the Study:

• To design and construct a flashlamp-pumped tunable dye laser system optimized for spontaneous Raman scattering experiments.
• To integrate a microprocessor-based system for diagnostics and control of the laser.
• To evaluate the performance of the developed laser system under relevant operating conditions.

Main Methods:

• Construction of a 5-J/pulse, 1.8-microsec pulse width, 10-Hz tunable dye laser.
• Implementation of a microprocessor-based control and diagnostic system.
• Testing and characterization of laser performance, including energy output, pulse stability, and spectral characteristics.

Main Results:

• The constructed laser system meets the specified performance parameters for spontaneous Raman scattering.
• The microprocessor control system enables stable and reliable operation.
• Initial tests demonstrate the system's suitability for probing combusting media.

Conclusions:

• A versatile and high-performance tunable dye laser system has been successfully developed for combustion diagnostics.
• The integrated control system enhances experimental reproducibility and data acquisition.
• This laser system provides a valuable tool for advancing research in combustion science.