MULTI-LENGTH LOOK-UP TABLE SPHERICAL CONSTELLATION SHAPING
Granted: January 18, 2024
Application Number:
20240022334
Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k to a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. In one example, each subgroup of bits of the k input bit sequence is provided to a respective look-up table, whereby the sub-group of bits constitutes an address of a…
MULTI-LENGTH LOOK-UP TABLE SPHERICAL CONSTELLATION SHAPING
Granted: January 18, 2024
Application Number:
20240022334
Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k to a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. In one example, each subgroup of bits of the k input bit sequence is provided to a respective look-up table, whereby the sub-group of bits constitutes an address of a…
Clock Recovery for Digital Subcarriers for Optical Networks
Granted: November 30, 2023
Application Number:
20230388041
Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal…
LOW PASS FILTER FOR TROSA HIGH FREQUENCY RESPONSE SUPPRESSION
Granted: September 14, 2023
Application Number:
20230291410
Consistent with the present disclosure, low pass filters are provided in the electrical paths connecting digital to analog converter (DAC) circuitry to an optical block package (also referred to as a “gold box”). The low pass filter blocks or substantially attenuates high frequency noise components present in an analog signal output from the DAC, thereby reducing errors that might otherwise be present in the transmitted data.
Clock Recovery For Subcarriers In Optical Networks
Granted: June 22, 2023
Application Number:
20230198626
Optical network systems are disclosed, including systems having transmitters with a digital signal processor comprising forward error correction circuitry that provides encoded first electrical signals based on input data; and power adjusting circuitry that receives second electrical signals indicative of the first electrical signals, the power adjusting circuitry supplying third electrical signals, wherein each of the third electrical signals is indicative of an optical power level of a…
Providing Access To Client Overhead While Transparently Transmitting The Client Signal Over Multiple Optical Subcarriers
Granted: June 22, 2023
Application Number:
20230198622
A method includes receiving client data; extracting overhead data from the client data; mapping the client data into one or more frames, where each of the one or more frames has a frame payload section and a frame overhead section, where the client data is mapped into the one or more frames; inserting the overhead data into the frame overhead section of the one or more frames; transporting the one or more frames across a network by generating a plurality of optical subcarriers carrying…
DIGITAL TONE-BASED APPARATUS AND METHOD FOR MEASURING THE FREQUENCY RESPONSE OF COHERENT OPTICAL TRANSMITTERS
Granted: May 11, 2023
Application Number:
20230146826
An optical network component, system, and method are herein described. The system and method include introducing an AM tone and data to an optical modulator generating a modulated optical signal, measuring an amplitude response of the AM tone within the modulated optical signal, calculating a frequency response based on the amplitude response, and calibrating the optical modulator with the frequency response.
WAVEGUIDE DUAL-DEPLETION REGION (DDR) PHOTODIODES
Granted: May 11, 2023
Application Number:
20230142387
Consistent with the present disclosure, a DDR photodiode is provided on a substrate adjacent to a passive waveguide. In order to efficiently capture light output from the waveguide, the photodiode is coupled to the waveguide with a butt-joint. As a result, the photodiode and the waveguide abut one another such that the dominant mode of light propagating in the waveguide parallel to the substrate is supplied directly to a side of the absorber layer of the photodiode without, in one…
WAVEGUIDE DUAL-DEPLETION REGION (DDR) PHOTODIODES
Granted: May 11, 2023
Application Number:
20230141436
Consistent with the present disclosure, a DDR photodiode is provided on a substrate adjacent to a passive waveguide. In order to efficiently capture light output from the waveguide, the photodiode is coupled to the waveguide with a butt-joint. As a result, the photodiode and the waveguide abut one another such that the dominant mode of light propagating in the waveguide parallel to the substrate is supplied directly to a side of the absorber layer of the photodiode without, in one…
WAVEGUIDE DUAL-DEPLETION REGION (DDR) PHOTODIODES
Granted: May 11, 2023
Application Number:
20230141290
Consistent with the present disclosure, a DDR photodiode is provided on a substrate adjacent to a passive waveguide. In order to efficiently capture light output from the waveguide, the photodiode is coupled to the waveguide with a butt-joint. As a result, the photodiode and the waveguide abut one another such that the dominant mode of light propagating in the waveguide parallel to the substrate is supplied directly to a side of the absorber layer of the photodiode without, in one…
DIGITAL TONE-BASED APPARATUS AND METHOD FOR MEASURING THE FREQUENCY RESPONSE OF COHERENT OPTICAL TRANSMITTERS
Granted: May 11, 2023
Application Number:
20230146826
An optical network component, system, and method are herein described. The system and method include introducing an AM tone and data to an optical modulator generating a modulated optical signal, measuring an amplitude response of the AM tone within the modulated optical signal, calculating a frequency response based on the amplitude response, and calibrating the optical modulator with the frequency response.
WAVEGUIDE DUAL-DEPLETION REGION (DDR) PHOTODIODES
Granted: May 11, 2023
Application Number:
20230142387
Consistent with the present disclosure, a DDR photodiode is provided on a substrate adjacent to a passive waveguide. In order to efficiently capture light output from the waveguide, the photodiode is coupled to the waveguide with a butt-joint. As a result, the photodiode and the waveguide abut one another such that the dominant mode of light propagating in the waveguide parallel to the substrate is supplied directly to a side of the absorber layer of the photodiode without, in one…
WAVEGUIDE DUAL-DEPLETION REGION (DDR) PHOTODIODES
Granted: May 11, 2023
Application Number:
20230141436
Consistent with the present disclosure, a DDR photodiode is provided on a substrate adjacent to a passive waveguide. In order to efficiently capture light output from the waveguide, the photodiode is coupled to the waveguide with a butt-joint. As a result, the photodiode and the waveguide abut one another such that the dominant mode of light propagating in the waveguide parallel to the substrate is supplied directly to a side of the absorber layer of the photodiode without, in one…
WAVEGUIDE DUAL-DEPLETION REGION (DDR) PHOTODIODES
Granted: May 11, 2023
Application Number:
20230141290
Consistent with the present disclosure, a DDR photodiode is provided on a substrate adjacent to a passive waveguide. In order to efficiently capture light output from the waveguide, the photodiode is coupled to the waveguide with a butt-joint. As a result, the photodiode and the waveguide abut one another such that the dominant mode of light propagating in the waveguide parallel to the substrate is supplied directly to a side of the absorber layer of the photodiode without, in one…
Probabilistic Constellation Shaping for Point-To-Multipoint Optical Fiber Communication Systems Employing Subcarriers
Granted: May 4, 2023
Application Number:
20230132851
Consistent with the present disclosure, a transmitter is provided in a hub node of a point-to-multi-point optical communication system. The transmitter supplies a plurality or group of optical subcarriers, each subgroup of the group of optical subcarriers in, one example, is associated with a respective leaf node. Since the leaf nodes may be located at different distances from the hub node, the modulation of each optical subcarrier subgroup is optimized for the distance and impairments…
Probabilistic Constellation Shaping for Point-To-Multipoint Optical Fiber Communication Systems Employing Subcarriers
Granted: May 4, 2023
Application Number:
20230132851
Consistent with the present disclosure, a transmitter is provided in a hub node of a point-to-multi-point optical communication system. The transmitter supplies a plurality or group of optical subcarriers, each subgroup of the group of optical subcarriers in, one example, is associated with a respective leaf node. Since the leaf nodes may be located at different distances from the hub node, the modulation of each optical subcarrier subgroup is optimized for the distance and impairments…
WAVEGUIDE DUAL-DEPLETION REGION (DDR) PHOTODIODES
Granted: May 4, 2023
Application Number:
20230133616
Consistent with the present disclosure, a DDR photodiode is provided on a substrate adjacent to a passive waveguide. In order to efficiently capture light output from the waveguide, the photodiode is coupled to the waveguide with a butt-joint. As a result, the photodiode and the waveguide abut one another such that the dominant mode of light propagating in the waveguide parallel to the substrate is supplied directly to a side of the absorber layer of the photodiode without, in one…
Clock Recovery for Digital Subcarriers for Optical Networks
Granted: May 4, 2023
Application Number:
20230135594
Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal…
Clock Recovery for Digital Subcarriers for Optical Networks
Granted: May 4, 2023
Application Number:
20230135594
Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal…
WAVEGUIDE DUAL-DEPLETION REGION (DDR) PHOTODIODES
Granted: May 4, 2023
Application Number:
20230133616
Consistent with the present disclosure, a DDR photodiode is provided on a substrate adjacent to a passive waveguide. In order to efficiently capture light output from the waveguide, the photodiode is coupled to the waveguide with a butt-joint. As a result, the photodiode and the waveguide abut one another such that the dominant mode of light propagating in the waveguide parallel to the substrate is supplied directly to a side of the absorber layer of the photodiode without, in one…
