Related Experiment Video
Updated: Jun 16, 2026

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
Observations of parametric fluorescence and oscillation in the infrared
Abstract:
Measurements of infrared optical parametric fluorescence are reported for the first time. Using a pump wavelength of 1.064 micro in LiNbO(3) , observations of the fluorescence power, bandwidth, and angular dependence at 1.63 micro are in good agreement with a plane-wave theory. The operating characteristics of two pulsed, internal, doubly resonant parametric oscillators are also reported and compared with predictions of the fluorescence measurements. With measured thresholds on the order of 400-700 W, the two oscillators provided nearly continuous tuning from 1.51 micro to 3.55 micro with average powers of 6 mW and peak powers of 600 W. These powers represent available pump conversion efficiencies of 10% and 50%, respectively. Oscillating bandwidths were only 10% of the fluorescence bandwidth and ranged from 1.7 cm (-1) to 45 cm(-1), depending on the output wavelength. Longitudinal mode structure and multiple pulsing of the oscillators were observed.
Related Concept Videos
Fluorescence and Phosphorescence: Instrumentation
Infrared (IR) Spectroscopy: Overview
Different compounds display unique properties due to their...
IR Spectroscopy: Molecular Vibration Overview
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Atomic Spectroscopy: Absorption, Emission, and Fluorescence
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
According to Hooke's law, the vibrational frequency is directly proportional to the...
Atomic Fluorescence Spectroscopy

