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公开(公告)号：US20180198549A1
公开(公告)日：2018-07-12
申请号：US15916557
申请日：2018-03-09
Applicant: Elenion Technologies, LLC
Inventor： Thomas Baehr-Jones , Yang Liu , Ran Ding
CPC classification number: H04J14/02 , H04B10/503 , H04B10/506 , H04B10/54
Abstract: A transmitter comprising a plurality of modulator and multiplexer (Mod-MUX) units, each Mod-MUX unit operating at an optical wavelength different from the other Mod-MUX units. The transmitter can additional include in each Mod-MUX unit two optical taps and three photodetectors that are configured to allow the respective Mod-MUX unit to be tuned to achieve thermal stabilization and achieve effective modulation and WDM operation across a range of temperatures. The Mod-MUX transmitter avoids the use of a frequency comb. The Mod-MUX transmitter avoids cross-modulation between different modulators for different laser signals.
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公开(公告)号：US10009103B2
公开(公告)日：2018-06-26
申请号：US15235075
申请日：2016-08-11
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY , THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
Inventor： Kerry Vahala , Scott Diddams , Jiang Li , Xu Yi , Hansuek Lee
IPC: H03B17/00 , H04B10/2507 , H04B10/2575 , H04B10/25 , H04B10/50 , H04L7/00 , H03L7/08 , H03L7/16
CPC classification number: H04B10/2507 , H03B17/00 , H03L7/08 , H03L7/16 , H04B10/2504 , H04B10/2575 , H04B10/503 , H04B2210/006 , H04L7/0075 , H04L7/0091
Abstract: A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2−N2fM. The optical detector generates a beat note at (v2−N2fM)−(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal.
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公开(公告)号：US20180175941A1
公开(公告)日：2018-06-21
申请号：US15847535
申请日：2017-12-19
Applicant: CABLE TELEVISION LABORATORIES, INC
Inventor： Luis Alberto CAMPOS , Zhensheng JIA
IPC: H04B10/532 , H04J14/06 , H04B10/61 , H04B10/25 , H04B10/50
CPC classification number: H04B10/532 , H04B10/25 , H04B10/2575 , H04B10/503 , H04B10/505 , H04B10/61 , H04B10/611 , H04B10/614 , H04J14/06
Abstract: A coherent optical transmitter is in operable communication with an optical fiber an includes a plurality of analog-to-digital converters (ADCs) configured to (i) receive a plurality of radio frequency analog input signals, respectively, and (ii) convert the received plurality of RF analog input signals into a plurality of respective digital data streams. The transmitter further includes a source laser configured to output at least two orthogonal polarization component signals, and at least two polarization modulators configured to modulate (i) an in-phase portion output from a first ADC, (ii) an in-quadrature portion output from a second ADC, and (iii) one polarization component signal of the at least two orthogonal polarization component signals. The transmitter further includes a polarization beam combiner configured to (i) multiplex the respective outputs of the at least two polarization modulators, and (ii) transmit the multiplexed output from the polarization beam combiner to the optical fiber.
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64.发明申请
公开(公告)号：US20180175589A1
公开(公告)日：2018-06-21
申请号：US15790010
申请日：2017-10-22
Applicant: Renesas Electronics Corporation
Inventor： Shunsuke NOZU , Yoshiharu MUROYA
CPC classification number: H01S5/1246 , H01S5/0287 , H01S5/0654 , H01S5/0683 , H01S5/1039 , H01S5/4087 , H04B10/503
Abstract: Provided is a distributed feed back semiconductor laser including a phase shift part capable of obtaining an excellent single-mode yield and a high luminous efficiency. A diffraction grating (105) is formed so as to extend in a guiding direction of a resonator between an end surface at which a low reflective film (111) is formed and an end surface at which a high reflective film (110) is formed. In diffraction grating (105) a plurality of phase shift parts (106) that discontinuously change a phase of the diffraction grating (105) in a predetermined range separated from the end surface at which the low reflective film (111) is formed are disposed.
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公开(公告)号：US09998217B2
公开(公告)日：2018-06-12
申请号：US15110175
申请日：2014-01-30
Applicant: Nokia Technologies Oy
Inventor： Hongwei Li , David Bitauld , Antti Niskanen
IPC: H04B10/00 , H04K1/02 , H04L9/08 , H04B10/112 , H04B10/118 , H04B1/3827 , H04B10/40 , H04B10/50
CPC classification number: H04B10/112 , H04B1/3833 , H04B10/1125 , H04B10/1129 , H04B10/118 , H04B10/40 , H04B10/503
Abstract: Methods and apparatuses, including computer program code are disclosed. The apparatus may include at least one processor and at least one memory including computer program code. The at least one processor, the at least one memory, and the computer program code may be configured to cause the apparatus to generate a divergent beam for an optical source that is coincident with a divergent beam for an optical detector. The apparatus may determine an adjustment to a mirror to cause an optical alignment of an incoming beam with the optical detector based on at least an optical intensity across the optical detector, wherein the alignment is with respect to at least another apparatus. The apparatus may adjust a position of the mirror according to the determined adjustment, and change the divergent beam to a collimated beam to enable optical communications with the other apparatus via the collimated beam.
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公开(公告)号：US20180145768A1
公开(公告)日：2018-05-24
申请号：US15711174
申请日：2017-09-21
Inventor： Hee Su PARK , Eun Joo Lee , Hee Jung Lee , Sang Min Lee
IPC: H04B10/70 , H04B10/291 , H04B10/61 , H04B10/50 , H04B10/2507 , H04J14/02
CPC classification number: H04B10/70 , H04B10/2507 , H04B10/2912 , H04B10/503 , H04B10/6161 , H04J14/02
Abstract: According to one embodiment of the present invention, there is provided a photon generating apparatus including: a light source configured to emit light; an optical medium configured to generate a pair of photons from the light; a detector configured to detect one photon from the pair of photons and output a detection time of the photon; a buffer including an optical line and an optical switch disposed on an optical path of the photon, which is one photon except for the photon detected by the detector, of the pair of photons; and a processor configured to output a driving signal which controls the optical switch so that a delay occurs at the optical path using the detection time of the photon detected by the detector.
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公开(公告)号：US20180131159A1
公开(公告)日：2018-05-10
申请号：US15866138
申请日：2018-01-09
Applicant: Infinera Corporation
Inventor： Peter W. Evans , Mingzhi Lu , Fred A. Kish, JR. , Vikrant Lal , Scott Corzine , John W. Osenbach , Jin Yan
CPC classification number: H01S5/1017 , G02B6/12004 , G02B6/2813 , G02B26/04 , G02B2006/12121 , G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2201/58 , H01S5/02453 , H01S5/02461 , H01S5/0261 , H01S5/0425 , H01S5/0612 , H01S5/06256 , H01S5/1003 , H01S5/1014 , H01S5/1215 , H01S5/2081 , H01S5/22 , H01S5/3013 , H01S5/3214 , H01S2301/176 , H04B10/2507 , H04B10/40 , H04B10/503 , H04B10/616 , H04B10/67
Abstract: Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second cladding layer provided on the waveguide core; and a heat source configured to change a temperature of at least one of the waveguide core and the grating, where an optical mode propagating in the waveguide core of the mirror section does not incur substantial loss due to interaction with portions of the mirror section above and below the waveguide core.
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公开(公告)号：US09912410B1
公开(公告)日：2018-03-06
申请号：US15258829
申请日：2016-09-07
Applicant: Rockwell Collins, Inc.
Inventor： Kim S. Jepsen , Raymond Zanoni , Wenlu Chen
IPC: H04J14/02 , H04B10/516 , H04B10/50 , H04B10/61
CPC classification number: H04B10/5161 , H04B10/503 , H04B10/612 , H04B10/616 , H04J14/02
Abstract: A system for optically down-converting a radio-frequency signal includes phase modulators in a push-pull configuration. Separately tuned optical bandpass filters pass through one or more harmonics and inverse harmonics based on the RF signal to produce a local oscillator. A balanced photo-detector receives a coherent interference signal and derives the down-converted local oscillator from a filtered harmonic and inverse harmonic.
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公开(公告)号：US20180063647A1
公开(公告)日：2018-03-01
申请号：US15790002
申请日：2017-10-22
Applicant: VocalZoom Systems Ltd.
Inventor： Alexander Blumkin , Amir Ganani , Tal Fishman , Tal Bakish
IPC: H04R23/00 , H04B10/564 , H04B10/50
CPC classification number: H04R23/008 , H04B10/503 , H04B10/506 , H04B10/564 , H04R23/02 , H04R2410/00
Abstract: A laser-based device or sensor includes: a first laser transmitter having a first self-mix carrier frequency; a second laser transmitter having a second, different, self-mix carrier frequency; a first monitor photodiode to receive a first optical signal from the first laser transmitter, and to output a first electric signal; a second monitor photodiode to receive a first optical signal from the second laser transmitter, and to output a second electric signal; an electric connection to connect together the first electric signal and the second electric signal, forming a combined electric signal; a single laser receiver to receive the combined electric signal and to generate from it a spectrum that corresponds to both (i) self-mix signal of the first laser transmitter, and (ii) self-mix signal of the second laser transmitter. Alternatively, a single monitor photodiode is used, receiving self-mix signals from multiple laser transmitters, and outputting a single electric signal to a single laser receiver.
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公开(公告)号：US20180019819A1
公开(公告)日：2018-01-18
申请号：US15649343
申请日：2017-07-13
Applicant: TEKO TELECOM S.R.L.
Inventor： Massimo Notargiacomo
CPC classification number: H04B10/25753 , G02B6/42 , H04B10/40 , H04B10/503 , H04J14/02 , H04J14/0278 , H04W88/085
Abstract: The optical transceiver module installable on the Master Unit side of a DAS system connectable to a plurality of Remote Units, comprises an uplink connector and a downlink connector connectable to a radio base station, first and second optical connectors connectable to the Remote Units, a downlink path for the connection between the downlink connector and the first and second optical connector, and an uplink path for the connection between the uplink connector and the first and second optical connectors, wherein the uplink path comprises a first coupler of the WDM type and a second coupler of the WDM type connected, respectively, to the first optical connector and to the second optical connector, and wherein the uplink path comprises first and second demultiplexers connected, respectively, to the outputs of the first coupler and of the second coupler and adapted to separate the optical signals coming from the Remote Units.
