Nonadiabatic Berry's phase for light propagating in an optical fiber

D Moore

R. Y. Chiao, Hong Jiao, Akira Tomita +1 more

Moshe Kugler, S. Shtrikman

Berry's phase that appears in adiabatically changed quantum systems can be derived, in many cases, by considering locally inertial coordinate frames in classical mechanics, without having to appeal to quantum mechanics. This derivation is applicable to light propagation in twisted optical fibers and to other systems where the perturbation can be reduced to a coordinate transformation. The classical nature of this derivation clarifies some nonquantum analogues of Berry's phase.

Paul Mandel, P. Galatola, L. A. Lugiato +1 more

Eyal Buks

We consider an all in-fiber optical modulator based on a ring resonator configuration. The case of adiabatic to nonadiabatic transition is considered, where the geometrical (Berry) phase acquired in a round trip along the ring changes abruptly by pi. Degradation of the responsivity of the modulator due to finite linewidth of the optical input is discussed. We show that the responsivity of the proposed modulator can be significantly enhanced with optimum design and compare with other configurations.

R. Y. Chiao, Paul G. Kwiat, Ivan Deutsch +1 more