Abstract

Many demonstrations of the generation and application of squeezed light have recently been made. Progress in its application to spectroscopy,¹ however, has been hampered by the lack of tunable sources of squeezed light. Present sources generate squeezing around a fixed frequency, whereas for spectroscopic applications, tunability is desirable. Here, I propose a scheme by which frequency-tunable squeezed light can be generated. I show that it is possible to change a light beam's frequency without affecting its quantum state. Consider the sum frequency process wherein a beam at ω₁ is mixed with a pump beam at ω₂ to generate the sum ω₃ = ω₁ + ω₂.

© 1990 Optical Society of America