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Springer series in optical sciences/SPringer series in optical sciences

Generation and Application of Squeezed States of Light

Harry J. Kimble, Robert J. Brecha, Luis A. Orozco, Mark G. Raizen, Ling-An Wu, Min Xiao

Published Jan 1, 1987• 1 citation
Publisher
DOI
10.1007/978-3-540-47973-4_36

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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.
The squeezed state is important in quantum metrology and quantum information. The most effective generation tool known is the optical parametric oscillator (OPO). Currently, only the squeezed states of lower-order spatial modes can be generated by an OPO. However, the squeezed states of higher-order spatial modes are more useful for applications such as quantum metrology, quantum imaging, and quantum information. A major challenge for future applications is efficient generation. Here we use cascaded phase-only spatial light modulators to modulate the amplitude and phase of the incident fundamental mode squeezed state. This efficiently generates a series of squeezed higher-order Hermite–Gauss modes and a squeezed arbitrary complex amplitude distributed mode. The method may yield new applications in biophotonics, quantum metrology, and quantum information processing.