Alcatel Lucent

Lucent Technologies Inc.

Other

Alcatel-lucent USA Inc.

Nokia of America Corporation

Agere Systems Inc.

Nokia Solutions and Networks Oy

Nec Research Institute, Inc.

Nokia Technologies Oy

Wsou Investments, LLC

David T Neilson

Roland Ryf

Nicolas K Fontaine

Peter Johannes Winzer

Randy Clinton Giles

Joseph Earl Ford

Dan Mark Marom

Pietro Arturo Bernasconi

Haoshuo Chen

Eugen Schenfeld

Po Dong

Cristian A Bolle

Mark P Earnshaw

Tae J Kim

Pietro A G Bernasconi

Christopher Richard Doerr

Young-Kai Chen

David John Bishop

Nagesh R Basavanhally

Flavio Pardo

Marina Thottan

Stuart T Stanton

Liming Zhang

Juerg Leuthold

Mark Meyers

Albert M Gottlieb

Kenneth W Fasanella

Young Kai Chen

Pietro Ag Bernasconi

Michael Kozhevnikov

Arun Vishwanath

Vijay Sivaraman

Pietro AG Bernasconi

Nils Weimann

Planar assemblies for coupling a plurality of optical transceivers to the same optical fiber. For example, the optical transceivers may be PON transceivers functioning according to different data rates and/or different modulation formats. Each optical transceiver communicates using one or more different wavelength channels. At least some of the disclosed planar assemblies are scalable to couple various numbers of optical transceivers to the same end face of an optical fiber, e.g., by fixing a corresponding number of passive, slab-like optical filters to a substantially planar surface of the support substrate to which the optical transceivers are also fixed adjacent and along. Some embodiments may employ various bulk lenses fixed to said planar surface to suitably relay light-beam segments between the end face of the fiber and the optical transceivers and/or between the different slab-like optical filters.

Planar assemblies for optical transceivers

An optical interconnect circuit for transmitting data between two or more electronic chips. In an example embodiment, the optical interconnect circuit comprises two or more photonic chips, each of which is vertically stacked with the corresponding electronic chip such that compact optical modulators and/or photodetectors of the photonic chip are in close proximity to the data sources/sinks of the corresponding electronic chip. Multi-core optical fibers and vertical coupling structures are used to provide multiple optical connections between different photonic chips. Advantageously, the provided capability to place optical modulators close to the data sources and to place photodetectors close to the data sinks can be used to reduce the amount of required electrical wiring. Optical-waveguide connections to the multi-core fibers can be used to allow for high density of optical conduits without spatially constraining the placement of data sources and/or data sinks on the electronic chips.

Chip-to-chip optical interconnect

An optical frequency-domain reflectometer (OFDR) capable of estimating the transfer matrix of a multimode optical fiber using mode-selective measurements performed from a single end of the fiber. In an example embodiment, the multimode optical fiber includes distributed reflectors designed to generate relatively strong light reflections along the length of the fiber at a desired spatial resolution. The embodiments may employ a signal-processing algorithm to estimate the fiber's transfer matrix by estimating segment transfer matrices corresponding to the fiber segments located between different ones of the distributed reflectors. Different embodiments of the disclosed OFDR can beneficially be adapted for use in different applications, such as fiber-optic component and module characterization, distributed optical sensing, biomedical imaging, OCT, etc.

Single-ended probing through a multimode fiber having distributed reflectors

Various embodiments relate to a method including: coupling one or more optical spatial pilot signals into a first end of optical fiber, wherein the optical fiber is a multimode optical fiber; Reflecting and modifying each mode of the optical pilot signals at a second end of the optical fiber; receiving a reflected portion of the one or more optical spatial pilot signals at the first end of the of the optical fiber in response to the reflected portion having propagated through the optical fiber in both directions; processing the reflected spatial pilot to determine components of one of a round-trip transfer matrix of the optical fiber and a single-direction transfer matrix of the optical fiber.

Single-end optical fiber transfer matrix measurement using spatial pilot

An optical line card includes a plurality of coherent receivers and a plurality of optical modulators. The coherent receivers are each configured to receive a corresponding channel of a received optical superchannel. The optical modulators are each configured transmit a corresponding channel of a transmitted optical superchannel. Each of a plurality of optical splitters is configured to receive a corresponding one of a plurality of unmodulated optical signals from an optical source external to the line card. Each splitter directs a first portion of light received by that splitter to a corresponding one of the coherent receivers, and a second portion of light received by that splitter to a corresponding one of said optical modulators.

Datacenter interconnection system

An optical apparatus includes a front optics section and a spectrometer section. The front optics section includes a spot de-multiplexer configured to receive a plurality of multi-mode optical signals each having a plurality of modal components, and to output in a linear array of a corresponding plurality of optical beams for each multimode optical signal. The spectrometer section includes a wavelength steering element configured to separate each of the optical beams into a plurality of wavelength channels. A fiber steering element is configured to steer the wavelength channels between the optical beams.

Wavelength-selective switch for space-division multiplexed systems

Disclosed herein are various embodiments of an optical cross-connect switch in which optical beamforming is used to generate desired (e.g., technically beneficial) beam profiles at the beam-steering element of the switch. An example beam profile that can be generated in this manner is a substantially rectangular beam profile generated from an input optical beam having a substantially Gaussian beam profile. The use of rectangular beam profiles may be beneficial because such beam profiles can be used to increase the optical fill factor of the beam-steering element of the switch, thereby enabling the switch to have a higher number of optical ports and/or a lower cost per optical port than comparable conventional optical cross-connect switches. In an example embodiment, the disclosed optical cross-connect switch can be used to implement a wavelength-selective optical router.

Beamforming for an optical switch

An apparatus includes a plurality of VCSELs, a master laser, one or more electrical drivers, and an optical combiner. The master laser is configured to transmit laser light to the VCSELs to optically lock wavelengths of the VCSELs. The one or more electrical drivers are connected to directly electrically modulate the VCSELs in a manner responsive to one or more digital data stream. The optical combiner is configured to combine light received from, at least, a pair of the VCSELs into an optical carrier with a substantially phase digital data modulation.

Optical modulator with vertical-cavity surface-emitting lasers

An optical amplifier includes a multi-mode pump laser module, a multi-mode waveguide, a multi-mode to multiple single-mode fiber converter module and a plurality of single-mode cores. The multi-mode pump laser module emits pump light having a plurality of modes to the multi-mode fiber or waveguide. The multi-mode waveguide propagates the emitted pump light to the converter module. The converter module receives the pump light and distributes the pump light approximately uniformly to a plurality of single-mode cores.

System and method for a multi-mode pump in an optical amplifier

A wavelength-selective cross-connect (WSXC) device configured to route any set of carrier wavelengths from a corresponding input port to any selected output port. The WSXC device comprises a diffraction grating and a beam-steering device optically coupled to one another and to the input/output ports using astigmatic optics. The astigmatic optics includes one or more cylindrical lenses configured to image one beam-steering surface onto another beam-steering surface to enable a continuous spectral response. The astigmatic optics may further include (i) a cylindrical Fourier lens that enables the WSXC device to convert a change in the angular beam steering performed by the beam-steering device into a corresponding image-spot displacement at the output ports and/or (ii) one or more cylindrical lenses configured to image the active surface of the beam-steering device onto the diffraction grating. Various unfolded configurations of the various embodiments of the WSXC device are also disclosed.

Wavelength-selective cross-connect device having astigmatic optics

Various exemplary embodiments relate to an optical amplifier, including: a multicore rare-earth doped optical fiber with a first plurality of cores associated with a first stage of the optical amplifier and a second plurality of cores associated with a second stage of the optical amplifier; a three dimensional (3D) waveguide configured to couple input space division multiplexed (SDM) channels into the first plurality of cores at a first end of the multicore rare-earth doped optical fiber and to couple channels from the second plurality of cores to output SDM channels; a reflector configured to optically interconnect the first plurality of cores to the second plurality of cores; and pump laser coupled to the multicore rare-earth doped optical fiber configured to produce laser pump light to pump the multicore rare-earth doped optical fiber.

Compact two-stage optical amplifier

An apparatus includes a plurality of input optical couplers and a plurality of output optical couplers. The input optical couplers are placed in a pattern to receive light from multiple locations of an end face of an input multimode optical fiber (MMOF). The output optical couplers are placed in a pattern to provide light to multiple locations of an end face of an output MMOF. The apparatus further includes a plurality of single-mode optical paths. Each of the paths is connected to a corresponding one of the input optical couplers and a corresponding one of the output optical couplers.

Spatial division diversity in photonic integrated circuits

An optical apparatus, comprising a wavelength selective switch, the wavelength selective switch including: one or more planar lightwave circuits and a plurality of optical beam steering assemblies. Each one of the planar lightwave circuits have at least one arrayed waveguide grating located thereon.

Hybrid wavelength selective switch

A wavelength-selective cross-connect (WSXC) device having N input ports and M output ports and configured to route any set of one or more carrier wavelengths from a corresponding input port to any selected output port. In one embodiment, the WSXC device includes a diffraction grating and a beam-steering device optically coupled to each other and to the input/output ports so that each of the carrier wavelengths traverses the diffraction grating and the beam-steering device two or more times en route from the respective input port to a designated output port. Various unfolded configurations of the WSXC device are also disclosed.

Compact wavelength-selective cross-connect device having multiple input ports and multiple output ports

Growing community of inventors

Old Bridge, NJ, United States of America

David T Neilson