Abstract:
In a method for dynamic buffer adjustment at a line card of router, a current buffer occupancy at the line card is compared with at least a first buffer occupancy threshold, the first buffer occupancy threshold being calculated based on a buffer occupancy threshold parameter and a capacity of at least a first buffer memory at the line card; and an active buffer capacity is adjusted by at least one of activating and deactivating buffer memory blocks at the line card based on the comparing step, the activating including switching on the buffer memory blocks, and the deactivating including causing the buffer memory blocks to enter a sleep state.
Abstract:
Diverse semiconductor structures are fabricated on a single substrate or wafer by using a non-selective area growth technique involving deposition of material over the entire substrate. The fabricated structures are obtained by selective removal of portions of the deposited material layers. Single level and multi-level structures are possible.
Abstract:
The invention includes an apparatus for modulating an optical signal. The apparatus includes a modulating mechanism comprising a plurality of modulating component arrays, each modulating component array comprising a plurality of modulating components, wherein adjacent ones of the plurality of modulating components in each modulating component array are separated by gaps, and wherein adjacent ones of the plurality of modulating component arrays are offset along a dispersion direction of an incident optical signal such that the gaps associated with the adjacent ones of the plurality of modulating component arrays are offset. In one embodiment, rows of the modulating components in the modulating component arrays are offset along the dispersion direction of the incident optical signal by a fraction of the modulating component pitch.
Abstract:
A dispersion compensator having relatively uniform transmission characteristics over the bandwidth of a communication channel. The compensator is designed to process an optical signal corresponding to the communication channel by decomposing that signal into spectral components, routing different components along different optical paths that impart relative delays between the components, and recombining the delayed components spatially and directionally to generate a processed optical signal with reduced chromatic dispersion. In one embodiment, the compensator is a waveguide circuit that includes four diffraction gratings operating in transmission and optically coupled to a tunable lens array, in which different tunable lenses receive light corresponding to different communication channels. For each channel, a desired group delay value is produced by selecting magnification strength of the corresponding tunable lens.
Abstract:
In a method for dynamic buffer adjustment at a line card of router, a current buffer occupancy at the line card is compared with at least a first buffer occupancy threshold, the first buffer occupancy threshold being calculated based on a buffer occupancy threshold parameter and a capacity of at least a first buffer memory at the line card; and an active buffer capacity is adjusted by at least one of activating and deactivating buffer memory blocks at the line card based on the comparing step, the activating including switching on the buffer memory blocks, and the deactivating including causing the buffer memory blocks to enter a sleep state.
Abstract:
A tunable laser module having two or more tunable lasers exhibiting different, possibly contiguous or partially overlapping wavelength regions. The lasers are integrated into a single package, thereby extending a total wavelength range for the package that is substantially beyond that covered by a single laser while—at the same time—providing gap-free wavelength range coverage. Of further advantage, the laser module employs a locking mechanism that is relatively immune from backscatter.