Finisar

About: Finisar is a company organization based out in Sunnyvale, California, United States. It is known for research contribution in the topics: Signal & Laser. The organization has 900 authors who have published 1523 publications receiving 22634 citations.

Method and apparatus for compensating an optical filter

Abstract: A method and apparatus for compensating an optical filter is disclosed The device substantially maintains the selected center wavelength in the optical filter across a range of operating temperatures In an embodiment of the invention an optical filter is disclosed for filtering a selected channel among a plurality of multiplexed channels of an optical communication The optical filter includes an optical fiber and an elongate housing The optical fiber has a first side and a second side and a filter portion intermediate the first side and the second side, and the optical fiber for transmitting the multiplexed optical communication and the filter portion for filtering the selected channel The elongate housing includes exposed end portions through which the optical fiber extends The optical fiber is affixed at each exposed end portion The exposed end portions exhibit between them a negative coefficient of thermal expansion sufficient to generate strains on the filter to substantially stabilize a filtered wavelength to substantially correspond with the selected channel during temperature variations In an alternate embodiment of the invention the elongate housing is defined about a longitudinal axis and including a first anchor pad and a second anchor pad to which the filter portion is affixed At least one of the anchor pads is at least initially movable in a plane intersecting the longitudinal axis to vary a strain on the filter portion to tune a center wavelength of the selected channel In another embodiment of the invention an optical filter for filtering an optical signal is disclosed In still another embodiment of the invention a method for compensating an optical filter is disclosed

All-channel tunable optical dispersion compensator based on linear translation of a waveguide grating router.

Abstract: We propose and demonstrate a compact tunable optical dispersion compensation (TODC) device with a 100 GHz free spectral range capable of mitigating chromatic dispersion impairments. The TODC is based on longitudinal movement of a waveguide grating router, resulting in chromatic dispersion compensation of ±1000 ps/nm. We employed our TODC device for compensating 42.8 Gbit/sec differential phase-shifting keying signal, transmitted over 50 km fiber with a −2 dB power penalty at 10−9.

Optimization of serdes sampling parameters

Abstract: One or more modules configured to cause a network diagnostic component to perform the following: an act of selecting first specific sampling parameters at which the SERDES is to receive network traffic; an act of determining a number of errors included in a signal output by the SERDES at the selected first specific sampling parameters; an act of repeating for a specified number of the remaining sampling parameters the acts of selecting specific sampling parameters and determining the number of errors in a signal output by the SERDES at the selected specific sampling parameter; an act of recording the number of errors for each selected specific sampling parameter in an output record, and an act of applying an optimization solution on the output record to thereby determine the specific sampling parameters that will cause the SERDES to output a signal with the lowest value of errors.

VCSEL design and integration for high-capacity optical interconnects

Abstract: Vertical-cavity surface-emitting lasers and multi-mode fibers is the dominating technology for short-reach optical interconnects in datacenters and high performance computing systems at current serial rates of up to 25-28 Gbit/s. This is likely to continue at 50-56 Gbit/s. The technology shows potential for 100 Gbit/s.

Molded communications module having integrated plastic circuit structures

Abstract: An embodiment disclosed herein relates to a communications module. The communications module includes a body composed of a plastic resin and a plurality of conductive traces and contact pads defined on a portion of a surface of the body. The module also includes at least one substantially vertical ridge defined on the body surface, and at least one pocket defined on the body suitable for receiving an electronic component. The communications module may also include a body composed of a plastic resin and conductive features defined on a surface of the body configured to render the communications module operable without implementing a printed circuit board as part of the body. Additional embodiments relate to systems and methods for attaching one or more optical transmit assemblies to the communications module and for electrically connecting conductive traces in a temporary fashion on the surface of the body of the communications module.