公开(公告)号：US12206217B2

公开(公告)日：2025-01-21

申请号：US18214223

申请日：2023-06-26

Applicant: II-IV Delaware, Inc.

Inventor： Zhoujian Wang ,  Xingyu Weng ,  Qiaowen Chen

IPC: H01S3/067 ,  H01S3/04 ,  H01S3/091 ,  H01S3/10 ,  H01S3/16 ,  H01S3/094 ,  H01S5/042

Abstract: A control system includes a field-programmable gate array (FPGA), a digital-to-analog conversion (DAC) circuit, an external TEC driver, and a pump chip. The field-programmable gate array (FPGA) includes a pump driver and a thermoelectric-cooler (TEC) controller. The digital-to-analog conversion (DAC) circuit is coupled to the FPGA. The external TEC driver is external to the FPGA and coupled to the FPGA. The pump chip includes a pump and a TEC and is coupled to the DAC circuit and the external TEC driver.

公开(公告)号：US12188998B2

公开(公告)日：2025-01-07

申请号：US18053535

申请日：2022-11-08

Applicant: Honeywell International Inc.

Inventor： Matthew Wade Puckett ,  Neal Eldrich Solmeyer ,  Mary Salit ,  Jianfeng Wu ,  Matthew Robbins

IPC: G01R33/32 ,  G01R33/032 ,  G02F1/39 ,  H01S3/091 ,  H01S3/108

Abstract: A photonics device for threshold magnetometry includes an absorbent material with nonlinear optical susceptibility, such as a diamond material with nitrogen vacancy defects, that is disposed in an optical resonator. The optical resonator receives light from an input source and includes nonlinear optical properties that enable the resonator to undergo a nonlinear photon generation process at a certain threshold power level to generate photons at distinct frequencies from the input light. The absorbent material absorbs photons entering the resonator when excited, which causes the threshold power level to shift as a function of the absorption. This may cause the optical resonator to stop generating photons via the nonlinear photon generation process and output a change in power. The change in power can be used to determine the characteristics of a present magnetic field.

公开(公告)号：US20240305368A1

公开(公告)日：2024-09-12

申请号：US18118169

申请日：2023-03-07

Applicant: Ciena Corporation

Inventor： Paul Chedore ,  Song Cao ,  Jean-Luc Archambault

IPC: H04B10/071 ,  H01S3/067 ,  H01S3/091 ,  H01S3/16

CPC classification number: H04B10/071 ,  H01S3/06754 ,  H01S3/0912 ,  H01S3/1608

Abstract: Laser safety shutoff or power reduction is disclosed for optically amplified fiber optic links with high transmission power. In an embodiment, a network element includes an amplifier configured to amplify one or more traffic carrying signals that are being transmitted over an optical fiber connected to the network element; a first receiver configured to receive a first monitoring signal that counter propagates over the optical fiber relative to the one or more traffic carrying signals; and circuitry configured to one or more of reduce power of the amplifier and shut off lasers associated with the amplifier, responsive to a loss of signal at the first receiver.

公开(公告)号：US12051882B2

公开(公告)日：2024-07-30

申请号：US17760725

申请日：2020-09-18

Applicant: OFS Fitel, LLC

Inventor： Daryl Inniss ,  Vitaly Mikhailov

IPC: H04B10/29 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/23 ,  H04B10/291 ,  H04B10/294 ,  H01S3/091

CPC classification number: H01S3/06762 ,  H01S3/06737 ,  H01S3/094007 ,  H01S3/094049 ,  H01S3/094061 ,  H01S3/09415 ,  H01S3/2383 ,  H04B10/2912 ,  H04B10/294 ,  H01S3/0912

Abstract: A system (e.g., an optical amplifier) comprising gain fibers (e.g., Bismuth-doped optical fiber) for amplifying optical signals. The optical signals have an operating center wavelength (λ0) that is centered between approximately 1260 nanometers (˜1260 nm) and ˜1360 nm (which is in the O-Band). The gain fibers are optically coupled to pump sources, with the number of pump sources being less than or equal to the number of gain fibers. The pump sources are (optionally) shared among the gain fibers, thereby providing more efficient use of resources.

公开(公告)号：US20230396031A1

公开(公告)日：2023-12-07

申请号：US18323976

申请日：2023-05-25

Applicant: University of Rochester

Inventor： Jonathan D. Zuegel ,  Christophe Dorrer

IPC: H01S3/091 ,  H01S3/00 ,  H01S3/10

CPC classification number: H01S3/0912 ,  H01S3/0057 ,  H01S3/1001

Abstract: At least one beam of pump pulses is combined in a nonlinear process with a plurality of monochromatic beams, each containing signal pulses of a unique wavelength. This produces an ensemble of beams of pulses having wavelengths of medium length. Then, all of the pulses in all of the beams in the ensemble are subject to second harmonic generation, optical parametric amplification, sum-frequency generation, or combinations to reduce the wavelengths of those pulses to ultraviolet wavelengths, thereby creating driver pulses. Driver beams made up of those reduced-wavelength driver pulses can then be focused upon a fuel pellet.

公开(公告)号：US11824320B2

公开(公告)日：2023-11-21

申请号：US17431822

申请日：2020-02-19

Applicant: NEC Corporation

Inventor： Shigeyuki Yanagimachi ,  Emmanuel Le Taillandier De Gabory

IPC: H04B10/02 ,  H01S3/091 ,  H01S3/00 ,  H01S3/067 ,  H01S3/10 ,  H04B10/25

CPC classification number: H01S3/0912 ,  H01S3/0014 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/10069 ,  H04B10/25

Abstract: An optical amplifier uses, in a gain medium, a multicore optical fiber having a plurality of cores, and comprises: an input-light power monitor that monitors the optical power of input light to the plurality of cores of the multicore optical fiber; an output-light power monitor that monitors the optical power of medium-passed output light from the plurality of cores that has passed through the multicore optical fiber; a crosstalk monitor that monitors the amount of inter-core crosstalk among the plurality of cores; and a controller that controls the pump-light power of pump light superimposed on the input light to the plurality of cores on the basis of the monitored optical power of input light, the monitored optical power of output light, and the monitored amount of inter-core crosstalk.

公开(公告)号：US20230335967A1

公开(公告)日：2023-10-19

申请号：US18214223

申请日：2023-06-26

Applicant: II-IV Delaware, Inc.

Inventor： Zhoujian WANG ,  Xingyu WENG ,  Qiaowen CHEN

IPC: H01S3/067 ,  H01S3/16 ,  H01S3/10 ,  H01S3/04 ,  H01S3/091

CPC classification number: H01S3/06754 ,  H01S3/1608 ,  H01S3/10069 ,  H01S3/0405 ,  H01S3/0912 ,  H01S5/042

Abstract: A control system includes a field-programmable gate array (FPGA), a digital-to-analog conversion (DAC) circuit, an external TEC driver, and a pump chip. The field-programmable gate array (FPGA) includes a pump driver and a thermoelectric-cooler (TEC) controller. The digital-to-analog conversion (DAC) circuit is coupled to the FPGA. The external TEC driver is external to the FPGA and coupled to the FPGA. The pump chip includes a pump and a TEC and is coupled to the DAC circuit and the external TEC driver.

公开(公告)号：US11784037B2

公开(公告)日：2023-10-10

申请号：US18161282

申请日：2023-01-30

Applicant: Hamamatsu Photonics K.K. ,  ENERGETIQ TECHNOLOGY, INC.

Inventor： Matthew Partlow ,  Donald Smith ,  Matthew Besen ,  Akinori Asai

IPC: H01J65/00 ,  H01J61/54 ,  H01S3/1115 ,  H01S3/094 ,  H01S3/091 ,  H01S3/16 ,  H01S3/06 ,  H01J61/16 ,  H01J65/04 ,  H01S3/13

CPC classification number: H01J61/54 ,  H01J61/16 ,  H01J65/00 ,  H01J65/04 ,  H01S3/0602 ,  H01S3/0621 ,  H01S3/0912 ,  H01S3/094038 ,  H01S3/1115 ,  H01S3/1623 ,  H01S3/1643 ,  H01S3/1305

Abstract: An electrodeless laser-driven light source includes a laser source that generates CW sustaining light. A pump laser generates pump light. A Q-switched laser crystal is positioned to receive the pump light and generates pulsed laser light in response to the generated pump light that propagates to a breakdown region in a gas filled bulb comprising an ionizing gas. A detector detects plasma light generated by a CW plasma located at least partly in a CW plasma region in the gas filled bulb comprising the ionizing gas and generates a detection signal. A controller generates control signals that control the pump light to the Q-switched laser crystal so as to extinguish the pulsed laser light within a time delay after the detection signal exceeds a threshold level.

公开(公告)号：US20230114758A1

公开(公告)日：2023-04-13

申请号：US17936663

申请日：2022-09-29

Applicant: Chongqing Institute of East China Normal University ,  East China Normal University ,  Yunnan Huapu quantum Material Co., Ltd ,  ROI Optoelectronics Technology CO, LTD. ,  Chongqing Huapu Scientific Instrument Co.,Ltd. ,  Chongqing Huapu Intelligent Equipment Co., Ltd. ,  GuangDong ROI Optoelectronics Technology Co., Ltd.

Inventor： Heping ZENG ,  Kun HUANG ,  Tingting YU ,  Mengyun HU

IPC: H01S3/11 ,  H01S3/091 ,  H01S3/13

Abstract: A high-precision repetition rate locking apparatus for an ultra-fast laser pulse includes: an electronic controlling component comprising: a standard clock, configured to provide a high-precision frequency standard; a pulse generator (PG), configured to provide an electrical pulse signal with adjustable repetition rate, pulse width and voltage magnitude; and a signal generator (SG), connected to the standard clock and the PG, and configured to provide a stable frequency signal for the PG, a phase-shift adjusting component, connected to the electronic controlling component and configured to implement phase modulation through electrically induced refractive index change; a resonant cavity component, comprising a phase shifter, a doped fiber, a laser diode, a wavelength division multiplexer and a reflector, and configured to generate a mode-locked pulse; and a detection system, configured to measure a repetition rate of an output pulse.

公开(公告)号：US11588292B2

公开(公告)日：2023-02-21

申请号：US16561580

申请日：2019-09-05

Applicant: Massachusetts Institute of Technology

Inventor： Peter Reeves-Hall ,  Juan C. Montoya ,  Dale H. Martz

IPC: H01S3/067 ,  H01S3/13 ,  H01S3/131 ,  H01S3/091 ,  G02B6/28

Abstract: A photonic lantern couples light from several fibers or fiber cores into one or more fibers or fiber cores. Photonic lanterns are often used to combine several lower-power beams into a single higher-power beam. They can also be used to couple light from multi-core fibers into single-mode, multi-mode, or other multi-core fibers. By modulating the phases of the input beams, the light can be switched from output to output—for example, between output cores of a multi-core output fiber. If desired, the beams can also be amplified using an active fiber in or coupled to the photonic lantern. A first photonic lantern couples signal light and pump light into the core and cladding, respectively, of an active multi-mode or multi-core fiber. And the active multi-mode or multi-core fiber couples amplified signal light into output fiber(s) via a second photonic lantern.