Mode locking in quantum optics

Hans‐A. Bachor

Wenyan Qu, Fei Feng, Jiazheng Song +1 more

Optical parametric oscillation is the critical part in the preparation of squeezed states of light. The mode-matching and fringe locking technique should be employed to improve the stability of the optical parametric oscillator cavity. How the mode-matching efficiency influence the squeezing degree of the squeezed light and the locking accuracy of the fringe locking technique were analyzed theoretically. Then the fringe locking technique was employed to stabilize the optical parametric oscillator cavity after the mode-matching between the laser mode and the fundamental mode of the cavity. The theoretical and experimental results show that a perfect mode-matching would improve the squeezing degree and the locking accuracy of the fringe locking technique, when the mode-matching is optimized, the length variance of the cavity is 7.35 nm and the locking time is no less than 2 h, which is sufficient for the detection of the squeezed states of light. ©, 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.

Werner Neuhauser, P. E. Toschek

Andrew Shabaev, Zachary Dutton, Thomas A. Kennedy +1 more

We propose using mode locking to enable coherent nonlinear optical effects in inhomogenously broadened spin ensembles. We carry out detailed calculations for quantum dot systems in which increased spin coherence via mode locking has been recently observed [A. Greilich et al., Science 313, 341 (2006); 317, 1896 (2007)]. We show how, in the presence of spin locking, a strong pulse-matching effect occurs, providing a powerful tool for high-bandwidth linear optical processing. We then go on to study ``slow light'' in this system and show that high-bandwidth pulses can be controllably delayed by a time comparable to the pulse width.

J. D. Harvey, D. B. Hirst, S. J. Carter +1 more

Recently it has been shown1 that the pulse characteristics of the mode locked argon laser on the Q of the cavity can only be explained by a swept gain superfluorescent model based on the optical Bloch equations.

S. Olivares