Summary

This 1978 volume, edited by Arthur Leonard Schawlow, compiles lectures from a summer school on laser spectroscopy. Its central thesis is that the unique properties of lasers—monochromaticity, coherence, and high intensity—enable spectroscopic techniques with vastly superior resolution and sensitivity compared to conventional light sources. The book systematically covers the principles of laser operation, including tunable dye lasers and gas lasers, then applies them to atomic and molecular spectroscopy. Key topics include Doppler-free saturation spectroscopy, two-photon absorption, and laser-induced fluorescence, which allow measurement of hyperfine structures, isotope shifts, and molecular energy levels with unprecedented precision. A reader gains a foundational understanding of how lasers revolutionized spectroscopy by eliminating Doppler broadening and enabling detection of trace species.

Full text isn't indexed yet — this overview draws on general knowledge of the book and its metadata, and chat works the same way.

Key concepts

Doppler-free saturation spectroscopy — A technique using two counter-propagating laser beams to cancel the Doppler shift, allowing observation of narrow spectral lines from atoms or molecules.
Tunable dye lasers — Lasers using organic dye solutions as gain media, whose output wavelength can be continuously adjusted across a wide range, essential for scanning spectral features.
Hyperfine structure — Small energy level splittings in atoms due to interactions between the nucleus and electrons, measurable only with high-resolution laser spectroscopy.
Laser-induced fluorescence — A method where laser light excites atoms or molecules, and the emitted fluorescence is detected, providing sensitive detection of species and their energy states.
Two-photon absorption — A process where an atom or molecule absorbs two photons simultaneously, enabling transitions to states not accessible by single-photon absorption, often with Doppler-free resolution.