Recent Developments in Optoelectronic and Spectroscopic Techniques at Queen's University, Belfast

Area of Science:

• Optics and Photonics
• Laser Physics
• Spectroscopy

Background:

• High-resolution laser spectroscopy demands sophisticated instrumentation for precise measurements.
• Time-resolved studies require advanced imaging and detection capabilities.

Purpose of the Study:

• To describe recent developments in fixed gap, spherical mirror confocal Fabry-Perot interferometers for time-resolved laser spectroscopy.
• To present applications of a novel multiple-beam image tube framing camera.
• To report on dye laser properties and a new pumping system, and to measure optical frequency shifts.

Main Methods:

• Utilized a confocal Fabry-Perot interferometer for high-resolution laser spectroscopy.
• Employed a multiple-beam image tube framing camera for nanosecond time-scale imaging.
• Developed a coaxial linear pinch flashtube pumped dye laser system.
• Measured optical frequency Stark shifts using a dye laser as a continuum source.

Main Results:

• Demonstrated interferograms of a high-brightness giant pulse ruby laser.
• Achieved spectral narrowing and mode locking in dye lasers.
• Obtained direct measurement of optical frequency Stark shift for the 7699-Å potassium resonance line.
• Measured subpicosecond pulses from a Nd:glass relaxation oscillator.

Conclusions:

• The developed Fabry-Perot interferometer and imaging camera enable advanced time-resolved laser spectroscopy.
• Dye laser advancements facilitate precise optical measurements.
• These techniques push the boundaries of high-resolution laser analysis and applications.