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 device for regulating the average wavelength of a laser, especially a semiconductor laser

Abstract: The invention relates to a method for regulating the average wavelength of a laser, especially a semiconductor laser, comprising a wavelength-selective, at least partially reflecting optical element (27) and being operated in a unimodal manner. The inventive method involves the following steps: a control variable influencing the optical resonator length (Lopt) of the laser (29) over a pre-determined range is modified continuously or step-by-step; the characteristic of the optical monitoring power (Pmon) which is influenced in this way and emerges on the side opposite the optical output of the laser (29), or the characteristic of a detection variable dependent on the optical monitoring power, is detected continuously or step-by-step; and the control variable influencing the optical resonator length (Lopt) is regulated in such a way that a pre-defined value of the increase of the characteristic of the optical monitoring power (Pmon) or the characteristic of the detection variable dependent on the optical monitoring power, is reached in a point inside the control variable range, or a pre-defined value of a functional dependence (F(dPmon/dLopt)) is reached, containing the increase of the characteristic of the optical monitoring power (Pmon) or of the characteristic of the detection variable dependent on the optical monitoring power. Furthermore, the invention relates to a device for carrying out the inventive method.

960 Gb/s optical backplane using embedded polymer waveguides and demonstration in a 12G SAS storage array

Abstract: An emerging eco-system is described enabling Tb/s bandwidth optical backplanes based on embedded polymer waveguides, passive optical backplane connectors and mid-board optical transceivers capable of bandwidths up to 28 Gb/s per lane.

Digital optical receiving module, and a method for monitoring the signal quality of a transmitted, modulated optical signal

Abstract: A digital optical receiving module including: an optical input, a first digital electrical output, an optoelectronic transducer device which converts a modulated optical signal, which is applied to the optical input, to an analog electrical signal, a decision-making device, which is electrically connected to the transducer device and converts the analog electrical signal to a digital signal and passes this digital signal to the digital electrical output, and a quality recording device, which is connected to the transducer device and determines the quality of the analog electrical signal before it is converted to a digital signal, with an information signal being produced as a function of the quality of the analog electrical signal. A method is also provided for monitoring the signal quality of a transmitted, modulated optical signal.

Filtering digital diagnostics information in an optical transceiver prior to reporting to host

Abstract: An optical transceiver (100) configured to perform filtering of digital diagnostics prior to the filtered results being made accessible to a host computing system (111) (hereinafter referred to simply as a 'host') that is communicatively coupled to the optical transceiver (100). The optical transceiver (100) includes sensor(s) (211A-C) that measures analog operational parameter signals such as temperature and supply voltage. The analog signals are each converted to a plurality of digital samples by analog to digital converter(s) (214). A processor (203A-B) executes microcode that causes the optical transceiver (100) to perform filtering on the various samples. The optical transceiver (100) may then make the filtered result accessible to the host (111).

Multiplexer/demultiplexer based on diffraction and reflection

Abstract: Transmissive diffraction grating(s), reflector(s), and multiple optical sources/receivers are arranged such that each one of multiple optical signals at corresponding different wavelengths co-propagating along a multiplexed beam path would: (i) be transmissively, dispersively diffracted at a multiplexed transmission region of a grating; (ii) propagate between the multiplexed transmission region and multiple demultiplexed transmission regions of a grating undergoing reflection(s) from the reflector(s); (iii) be transmissively, dispersively diffracted at the demultiplexed transmission regions; and (iv) propagate between the demultiplexed transmission regions and the sources/receivers along multiple demultiplexed beam paths.