Pulse advancement and delay in an integrated-optical two-port ring-resonator circuit : direct experimental observations

We report experimental observations of the negative-group-velocity (v(g)) phenomenon in an integrated-optical two-port ring-resonator circuit. We demonstrate that when the v(g) is negative, the (main) peak of output pulse appears earlier than the peak of a reference pulse, while for a positive v(g),...

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Bibliographic Details
Published in:Optics letters 2007-09, Vol.32 (17), p.2620-2622
Main Authors: URANUS, H. P, ZHUANG, L, ROELOFFZEN, C. G. H, HOEKSTRA, H. J. W. M
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Integrated optics. Optical fibers and wave guides
Laser optical systems: design and operation
Optical and optoelectronic circuits
Optics
Physics
Resonators, cavities, amplifiers, arrays, and rings
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Summary:We report experimental observations of the negative-group-velocity (v(g)) phenomenon in an integrated-optical two-port ring-resonator circuit. We demonstrate that when the v(g) is negative, the (main) peak of output pulse appears earlier than the peak of a reference pulse, while for a positive v(g), the situation is the other way around. We observed that a pulse splitting phenomenon occurs in the neighborhood of the critical-coupling point. This pulse splitting limits the maximum achievable delay and advancement of a single device as well as facilitating a smooth transition from highly advanced to highly delayed pulse, and vice versa, across the critical-coupling point.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.32.002620