Abstract

The background in saturation spectroscopy is decreased by balancing the probe beam, in amplitude and phase, against a second probe, using a configuration like a Jamin interferometer. This improves the signal-to-noise ratio. If the phase is adjustable to provide best balance while the laser is tuned, the signal is proportional to the square of the absorption, and the line width is accordingly reduced.

© 1978 Optical Society of America

Cross-beam saturated interference spectroscopy in flames

G. Zizak, J. Lanauze, and James D. Winefordner
Appl. Opt. 24(20) 3319-3321 (1985)

Mode locking with a slow saturable absorber in a transverse resonator

E. A. Stappaerts and W. H. Long
Opt. Lett. 3(6) 226-228 (1978)

CO₂ laser saturation of internal-vibrational modes of molecular impurities in alkali halides

A. R. Chraplyvy and A. J. Sievers
Opt. Lett. 3(3) 112-114 (1978)

Sub-Doppler Raman saturation spectroscopy

Adelbert Owyoung and Peter Esherick
Opt. Lett. 5(10) 421-423 (1980)

Spectroscopy of ¹²CF₄ features near the 9-μm ¹²C¹⁶O₂R(10), R(12), and R(18) lines by CO₂-laser and diode-laser spectroscopy

Leon J. Radziemski, Richard F. Begley, Herbert Flicker, Norris G. Nereson, and Martin J. Reisfeld
Opt. Lett. 3(6) 241-243 (1978)