Trap-door optical buffering using a flat-top coupled microring filter: the superluminal cavity approach

Abstract

We propose and analyze theoretically a trap-door optical buffer based on a coupled microrings flat-top add/drop filter (ADF). By tuning one of the microrings into and out of resonance we can effectively open and close the buffer trap door and, consequently, trap and release optical pulses. To attain a maximally flat filter we present a new design approach utilizing the concept of a white light cavity to attain an ADF that resonates over a wide spectral band. We show that the resulting ADF exhibits superior performance in terms of bandwidth and flatness compared to previous design approaches. We also present a realistic silicon-on-insulator-based design and a performance analysis, taking into consideration the realistic properties and limitations of the materials and the fabrication process, leading to delays exceeding 5 ns for an 80 GHz bandwidth and a corresponding delay-bandwidth product of approximately 400.

Temperature sensitivity of the cavity scale factor enhancement for a Gaussian absorption resonance

“…The change in the optical mode frequency of a cavity due to a change in cavity length may be increased by a large factor through the anomalous dispersion associated with the absorption resonance of an intracavity medium. Enhancement of the scale factor relating the mode frequency of the optical cavity to its optical path length may be useful for a number of precision measurement applications, such as higher sensitivity passive and active ring resonator gyroscopes (see [1] and references, therein; [2][3][4]). The scale factor enhancement, S, depends on the absorption profile and is greatest when the cavity mode is resonant with the absorption medium.…”

Analysis on transmission characteristics of nested ring resonators

“…NRRs can be consisted of more than one ring, such as those having two or three rings in them [21,22]. It is worth to mention that NRRs with odd and with even number of rings are very different both in terms of the light-guided path and the transmission characteristics.…”

Simultaneous force and temperature measurement using optical microfiber asymmetrical interferometer

“…Since its first development [1], the optical micro/nanofiber [2] has been used as a platform for fiber-optic sensing [3,4] and also for developing new passive components [5]. It has distinct advantages for sensing such as the high sensitivity due to its quite small diameter and strong evanescent wave [6] and quick response to the ambient parameter changes [7].…”