公开(公告)号：US20240129037A1

公开(公告)日：2024-04-18

申请号：US18371064

申请日：2023-09-21

申请人： NEC Corporation

发明人： Fujio OKUMURA ,  Hiroshi Imai

IPC分类号： H04B10/50 ,  H04B10/548

CPC分类号： H04B10/501 ,  H04B10/548

摘要： A transmitter includes a light source including a first light emitter and a second light emitter, a spatial light modulator including a modulation part that modulates light emitted from the light source, a first mirror that is arranged on a first optical path of the modulated light modulated by the modulation part and reflects the modulated light toward a first projection direction, and a second mirror that is arranged on a second optical path of the modulated light modulated by the modulation part and reflects the modulated light toward the first projection direction.

公开(公告)号：US20240128992A1

公开(公告)日：2024-04-18

申请号：US18488709

申请日：2023-10-17

申请人： GenXComm, Inc.

发明人： Farzad Mokhtari-Koushyar ,  Thien-An Nguyen ,  Che-Chun Lin

IPC分类号： H04B1/12 ,  H04B10/50 ,  H04B10/60

CPC分类号： H04B1/12 ,  H04B10/503 ,  H04B10/60 ,  H04B2210/006

摘要： A programmable filter for electronic signals. The filter includes an input that splits power of the input signal along two paths, a first and second path that is phase shifted by ninety degrees in respect of the first path. The first and second path are each modulated to the optical domain, and provided as input to respective filter chains. The in-phase signal can be filtered by IIR or FIR optical filters with configurable operation, as well the shifted signal can be filtered by a second chain of IIR and FIR optical filters with configurable operation. Resulting output from each filter chain is recombined and demodulated from the optical domain. In this manner, the electronic filter can adopt any suitable impulse response, including impulse responses described with complex coefficients. Real parts can be configured by operation of the first filter chain and imaginary parts by operation of the second filter chain.

公开(公告)号：US11956018B2

公开(公告)日：2024-04-09

申请号：US17899663

申请日：2022-08-31

申请人： FUJITSU LIMITED

发明人： Guoxiu Huang ,  Hisao Nakashima

IPC分类号： H04B10/50 ,  H04B10/40 ,  H04B10/60

CPC分类号： H04B10/50 ,  H04B10/40 ,  H04B10/60

摘要： A quantizer includes: a clipper configured to clip a portion exceeding a quantization range of a sample value sampled at a predetermined rate; and a noise shaper configured to determine a plurality of candidates for a quantization level based on the clipped sample value, and outputs, as a quantization value, a value obtained by adding a minimum noise in which a noise in a low-frequency region is minimum among noises generated in each candidate to the sample value before clipping.

公开(公告)号：US11953193B2

公开(公告)日：2024-04-09

申请号：US17471885

申请日：2021-09-10

申请人： SACO Technologies Inc.

发明人： Bassam Jalbout ,  Brian Wong

IPC分类号： F21V14/00 ,  F21V5/04 ,  F21V13/04 ,  F21V19/00 ,  F21V19/02 ,  F21V23/00 ,  G02B5/00 ,  G02B19/00 ,  G02B27/09 ,  G09G3/00 ,  G09G3/32 ,  H04B10/114 ,  H04B10/50 ,  F21Y105/10 ,  F21Y115/10

CPC分类号： F21V5/045 ,  F21V5/04 ,  F21V13/04 ,  F21V14/00 ,  F21V19/0015 ,  F21V19/02 ,  F21V23/004 ,  G02B5/003 ,  G02B19/0028 ,  G02B19/009 ,  G02B27/0927 ,  G02B27/0955 ,  G02B27/0977 ,  G09G3/001 ,  G09G3/32 ,  H04B10/50 ,  H04B10/502 ,  F21Y2105/10 ,  F21Y2115/10 ,  G09G2330/02 ,  G09G2354/00 ,  H04B10/1141

摘要： A device comprises an enclosure having a rear opening adapted to receive a light beam from a light source, a front opening adapted to emit a modified light beam, and internal walls extending between the rear opening and the front opening. The light beam is modified according to a perimeter of the front opening. A light shaping assembly comprises a two-dimensional array formed of a plurality of such devices, each one of the plurality of devices being adapted to receive a light beam from a corresponding light source.

公开(公告)号：US11949783B1

公开(公告)日：2024-04-02

申请号：US18108787

申请日：2023-02-13

申请人： CABLE TELEVISION LABORATORIES, INC.

发明人： Jing Wang ,  Bernardo Huberman

IPC分类号： H04L9/08 ,  G02F1/313 ,  G06N10/00 ,  H04B10/27 ,  H04B10/50 ,  H04B10/66 ,  H04B10/70

CPC分类号： H04L9/0855 ,  G02F1/313 ,  G06N10/00 ,  H04B10/50 ,  H04B10/66 ,  H04B10/70 ,  H04L9/0819 ,  H04L9/083 ,  H04L9/0894 ,  G02F2201/30 ,  H04B10/27

摘要： Methods, systems, and devices for quantum key distribution (QKD) in passive optical networks (PONs) are described. A PON may be a point-to-multipoint system and may include a central node in communication with multiple remote nodes. In some cases, each remote node may include a QKD transmitter configured to generate a quantum pulse indicating a quantum key, a synchronization pulse generator configured to generate a timing indication of the quantum pulse, and filter configured to output the quantum pulse and the timing indication to the central node via an optical component (e.g., an optical splitter, a cyclic arrayed waveguide grating (AWG) router). The central node may receive the timing indications and quantum pulses from multiple remote nodes. Thus, the central node and remote nodes may be configured to communicate data encrypted using quantum keys.

公开(公告)号：US11949457B1

公开(公告)日：2024-04-02

申请号：US18514849

申请日：2023-11-20

申请人： Attochron, LLC

发明人： Thomas M. Chaffee ,  Wayne H. Knox

IPC分类号： H04B10/00 ,  H04B10/50 ,  H04B10/508 ,  H04B10/516

CPC分类号： H04B10/5162 ,  H04B10/502 ,  H04B10/508

摘要： Systems and methods are described for transmitting information optically. For instance, a system may include an optical source configured to generate a beam of light. The system may include at least one modulator configured to encode data on the beam of light to produce an encoded beam of light/encoded plurality of pulses. The system may include a spectrally-equalizing amplifier configured to receive the encoded beam of light/encoded plurality of pulses from the at least one modulator and both amplify and filter the encoded beam of light/encoded plurality of pulses to produce a filtered beam of light/filtered plurality of pulses, thereby spectrally equalizing a gain applied to the encoded beam of light. In some cases, the system may slice the beam of slight, to ensure a detector has impulsive detection. In some cases, the system may include a temperature controller to shift a distribution curve of wavelengths of the optical source.

公开(公告)号：US20240106557A1

公开(公告)日：2024-03-28

申请号：US17954985

申请日：2022-09-28

申请人： Fujitsu Limited

发明人： Akihiro MUKAI ,  Yoshito Kachita ,  David Dal Farra

IPC分类号： H04J14/02 ,  H04B10/50

CPC分类号： H04J14/0212 ,  H04B10/50

摘要： An optical transmission device configured to: receive an input of signal interruption information from a second optical transmission device that detects a signal interruption of signal light on a transmission path, and to receive an input of ASE light after the signal interruption, has a wavelength selective switch configured to drop and/or add signal light; a memory; and a processor coupled to the memory. The processor is configured to: switch, based on the input of the signal interruption information from the second optical transmission device, control of output of the wavelength selective switch from a constant level control of the output, to a constant level control of attenuation for holding an amount of the attenuation of the signal light constant; and return the constant level control of the attenuation to the constant level control of the output, after the input of the ASE light.

公开(公告)号：US11923968B2

公开(公告)日：2024-03-05

申请号：US17565112

申请日：2021-12-29

申请人： FUJITSU LIMITED

发明人： Yuji Tochio

IPC分类号： H04J14/08 ,  H04B10/27 ,  H04B10/50

CPC分类号： H04J14/08 ,  H04B10/27 ,  H04B10/50

摘要： An optical transmission device includes: a signal processor, a first frame generator circuit and a second frame generator circuit. The signal processor accommodates a client signal into one or a plurality of time slot sequences among n time slot sequences. The first frame generator circuit generates a frame including the client signal accommodated into a part of time slot sequences among the n time slot sequences. The second frame generator circuit generates a frame including the client signal accommodated into other time slot sequences among the n time slot sequences. The signal processor accommodates the client signal into the n time slot sequences when the first frame generator circuit and the second frame generator circuit are implemented, and accommodates the client signal into the other time slot sequences when the first frame generator circuit is not implemented and the second frame generator circuit is implemented.

公开(公告)号：US11923659B2

公开(公告)日：2024-03-05

申请号：US16991086

申请日：2020-08-12

申请人： FURUKAWA ELECTRIC CO., LTD.

发明人： Masayoshi Nishita ,  Atsushi Yamamoto

IPC分类号： H01S5/06 ,  H01S5/00 ,  H01S5/024 ,  H01S5/0687 ,  H04B10/50 ,  H04B10/572

CPC分类号： H01S5/0612 ,  H01S5/0078 ,  H01S5/02407 ,  H01S5/0687 ,  H04B10/503 ,  H04B10/572

摘要： A method for controlling a wavelength of an optical module, includes: a laser light source unit emitting a laser beam; a wavelength filter having a periodical transmission characteristic with respect to a wavelength of light; a temperature controller on which the wavelength filter is placed and that adjusting a temperature of the wavelength filter; a heat generating body placed on the temperature controller; and a control device controlling the wavelength of the laser beam emitted from the laser light source unit and control the transmission characteristic of the wavelength filter based on an intensity of the laser beam transmitted through the wavelength filter, the method including changing at least one of a target value of the wavelength control of the laser beam and a target value of the control of the wavelength filter based on a current value of the heat generating body.

公开(公告)号：US11916595B1

公开(公告)日：2024-02-27

申请号：US18238801

申请日：2023-08-28

申请人： THE JALALI FAMILY TRUST DATED DECEMBER 30, 2006

发明人： Bahram Jalali ,  William R Ryan

IPC分类号： H04J14/02 ,  H04B10/2543 ,  H04B10/2575 ,  H04B10/50 ,  H04B10/58

CPC分类号： H04B10/2543 ,  H04J14/0307 ,  H04B10/2575 ,  H04B10/505 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50595 ,  H04B10/58 ,  H04B2210/075 ,  H04J14/02 ,  H04J14/0279

摘要： Described herein is a solution to address the intrinsic nonlinearity of analog signals and the restrictions this places on the signals dynamic range. The subject matter described herein produces linear electro-optic modulation over a dramatically wider range of the input signal amplitude. This is accomplished by a distributed multiwavelength design that “folds” the large dynamic range across multiple linear subranges, with each subrange being addressed using an optical wavelength. As a result, the subrange within the wide dynamic range of the input signal is captured by the linear portion of the transfer function of a single transfer function. Several physical implementations of this subject are presented herein. This innovation enables the efficient use of optical links for the transmission and processing of analog and multilevel signals, overcoming the limitations that were once hindering progress in this field.