公开(公告)号：US11799263B2

公开(公告)日：2023-10-24

申请号：US16624574

申请日：2018-06-13

Applicant: M SQUARED LASERS LIMITED

Inventor： Gareth Thomas Maker ,  Graeme Peter Alexander Malcolm ,  Simon Munro

IPC: H01S3/108 ,  H01S3/08022 ,  H01S3/08036 ,  H01S3/081 ,  H01S3/106 ,  H01S3/107 ,  H01S3/16 ,  H01S3/0941

CPC classification number: H01S3/108 ,  H01S3/0816 ,  H01S3/08027 ,  H01S3/08036 ,  H01S3/107 ,  H01S3/1062 ,  H01S3/1625 ,  H01S3/1636 ,  H01S3/0941

Abstract: An electro-optic modulator (EOM) for altering an optical path length of an optical field is described. The EOM comprises first and second Brewster-angle cut nonlinear crystals having a first and second optical axis. The optical axes are orientated relative to each other such that when an optical field propagates through the nonlinear crystals it experiences no overall deviation. The nonlinear crystals are also arranged to be opposite handed relative to the optical field. The EOM has the advantage that its optical losses are lower when compared with those EOMs known in the art. In addition, the EOM can be inserted into, or removed from, an optical system without any deviation being imparted onto the optical field. This reduces the levels of skill and effort required on the part of an operator. The described method and apparatus for mounting the nonlinear crystals also suppresses problematic piezo-electric resonances within the nonlinear crystals.

公开(公告)号：US20180254611A1

公开(公告)日：2018-09-06

申请号：US15759977

申请日：2016-09-14

Applicant: Technische Universitaet Muenchen

Inventor： Benedikt MAYER ,  Gregor KOBLMUELLER ,  Jonathan FINLEY ,  Johannes KLICPERA ,  Gerhard ABSTREITER

IPC: H01S5/34 ,  H01S5/00 ,  H01S5/02 ,  H01S5/024 ,  H01S5/026 ,  H01S5/183 ,  H01S5/30 ,  H01S5/42 ,  G02F1/225

CPC classification number: H01S5/3428 ,  G02B6/42 ,  G02F1/225 ,  H01S3/107 ,  H01S3/108 ,  H01S3/1103 ,  H01S3/14 ,  H01S5/0085 ,  H01S5/0092 ,  H01S5/021 ,  H01S5/0218 ,  H01S5/0243 ,  H01S5/026 ,  H01S5/0265 ,  H01S5/0608 ,  H01S5/142 ,  H01S5/18369 ,  H01S5/305 ,  H01S5/3054 ,  H01S5/341 ,  H01S5/42 ,  H01S5/423

Abstract: A core-shell nanowire laser structure comprises a substrate (12), an elongated support element (14) extending from the substrate, the support element having a first diameter, and an elongated body element (16) extending on and/or around the support element, the body element having a second diameter at least two times larger than the first diameter, wherein the body element is spaced apart from the substrate.

公开(公告)号：US20180175579A1

公开(公告)日：2018-06-21

申请号：US15884271

申请日：2018-01-30

Applicant: THE UAB RESEARCH FOUNDATION

Inventor： Sergey B. Mirov ,  Vladimir V. Fedorov

IPC: H01S3/08 ,  H01S3/0941 ,  C30B31/02 ,  H01S3/06 ,  H01S3/16 ,  H01S3/117 ,  H01S3/115 ,  H01S3/108 ,  H01S3/1055 ,  C30B31/00 ,  H01S3/094 ,  H01S3/00 ,  H01S3/113

CPC classification number: H01S3/0805 ,  C30B29/48 ,  C30B31/00 ,  C30B31/02 ,  H01S3/0014 ,  H01S3/0604 ,  H01S3/0617 ,  H01S3/0627 ,  H01S3/08009 ,  H01S3/08086 ,  H01S3/094038 ,  H01S3/094042 ,  H01S3/094046 ,  H01S3/09415 ,  H01S3/1055 ,  H01S3/108 ,  H01S3/113 ,  H01S3/115 ,  H01S3/117 ,  H01S3/162 ,  H01S3/1623 ,  H01S3/1628 ,  H01S2301/04 ,  Y10S438/917

Abstract: A method of performing spatial separation of different wavelengths in a single laser cavity includes generating, from a pump radiation source, pump radiations in spatially separate channels and focusing the generated pump radiations in the spatially separate channels towards an active gain medium having amplification spectra. The method also includes emitting from the active gain medium, amplified radiations of the spatially separate channels, each channel of the spatially separate channels representing a corresponding wavelength and focusing the emitted amplified radiations of the spatially separated channels towards an aperture. The method further includes suppressing, at the aperture, an off-axis mode of the amplified radiations of the spatially separate channels, diffracting the amplified radiations of the spatially separate channels received through the aperture to provide diffracted radiations and returning a portion of the diffracted radiations back to the aperture, and collimating the diffracted radiations of the spatially separate channel.

公开(公告)号：US20180102625A1

公开(公告)日：2018-04-12

申请号：US15726554

申请日：2017-10-06

Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)

Inventor： Camille-Sophie Brès ,  Svyatoslav Kharitonov

IPC: H01S3/16 ,  H01S3/067 ,  H01S3/108 ,  H01S3/11

CPC classification number: H01S3/1616 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/07 ,  H01S3/08027 ,  H01S3/0809 ,  H01S3/0826 ,  H01S3/094011 ,  H01S3/094042 ,  H01S3/108 ,  H01S3/11 ,  H01S3/1608 ,  H01S3/161

Abstract: An unidirectional short-wave infrared fiber laser, comprising a theta cavity, with a gain unit based on rare-earth cations-doped fiber, the theta cavity having a ring cavity with two additional 2 input ports×2 output ports directional couplers DC1 and DC2 inserted therein, one port of the directional coupler DC1 connected to another port of the directional coupler DC2, forming an S-shaped feedback; a band-pass filter to select at a laser wavelength by filtering through transmission inside the theta cavity, the band-pass filter is one of the list comprising a grating-based filter, a Fabry-Perot etalon, and a phase shifted fiber-Bragg grating; and a reflective fiber Bragg grating (FBG) to select the laser wavelength by filtering through reflection inside the theta cavity, the Bragg grating is a notch filter, and the fiber Bragg grating (FBG) is attached to an unused port of the directional coupler DC1 or DC2.

公开(公告)号：US09774163B2

公开(公告)日：2017-09-26

申请号：US13792173

申请日：2013-03-10

Applicant: Fianium Ltd.

Inventor： John Redvers Clowes ,  Anatoly Borisovich Grudinin ,  Ian Michael Godfrey

IPC: H01S3/11 ,  G02B21/16 ,  G02F1/35 ,  H01S3/23 ,  H01S3/10 ,  H01S3/102 ,  H01S3/108 ,  G01N21/64 ,  G02F1/365

CPC classification number: H01S3/11 ,  G01N21/6458 ,  G01N2021/6419 ,  G01N2021/6441 ,  G01N2201/0697 ,  G02B21/16 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3528 ,  H01S3/10 ,  H01S3/10046 ,  H01S3/1024 ,  H01S3/108 ,  H01S3/2308

Abstract: Variable repetition rate and wavelength optical pulse source, comprising a fixed or variable repetition rate source of supercontinuum pulses; a wavelength tunable optical bandpass filter to filter the supercontinuum pulses at two or more wavelengths, wherein said source of supercontinuum pulses and said wavelength tunable optical bandpass filter are configured such that the optical pulse source can provide variable repetition rate and variable wavelength optical pulses including a series of repetition rates with selected wavelength-varying pulse trains.

公开(公告)号：US20170250518A1

公开(公告)日：2017-08-31

申请号：US15431111

申请日：2017-02-13

Applicant: NKT Photonics A/S

Inventor： John Redvers Clowes ,  Anatoly Borisovich Grudinin ,  Ian Michael Godfrey

IPC: H01S3/13

CPC classification number: H01S3/11 ,  G01N21/6458 ,  G01N2021/6419 ,  G01N2021/6441 ,  G01N2201/0697 ,  G02B21/16 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3528 ,  H01S3/10 ,  H01S3/10046 ,  H01S3/1024 ,  H01S3/108 ,  H01S3/2308

Abstract: A method of providing optical supercontinuum pulses can comprise generating optical pump pulses with an optical pump laser, the optical pump pulses having a pump pulse repetition rate; launching optical pump pulses into a nonlinear optical element comprising an optical fiber; generating optical supercontinuum pulses from the optical pump pules via spectral broadening within the optical fiber; selectively providing a plurality of different repetition rates for the optical pump pulses so as to generate optical supercontinuum pulses having different repetition rates; and providing nominally identical spectral broadening of the optical supercontinuum pules having the different repetition rates.

公开(公告)号：US20170054268A1

公开(公告)日：2017-02-23

申请号：US15119005

申请日：2015-02-09

Applicant: SPECTRONIX CORPORATION

Inventor： Joji OKADA ,  Yosuke ORII

IPC: H01S3/10 ,  H01S3/094 ,  H01S3/0941 ,  H01S5/12 ,  H01S3/106 ,  H01S3/108 ,  H01S3/23 ,  H01S3/067 ,  H01S3/16

CPC classification number: H01S3/10007 ,  H01S3/0064 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06716 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094076 ,  H01S3/09415 ,  H01S3/1003 ,  H01S3/1068 ,  H01S3/108 ,  H01S3/1611 ,  H01S3/1618 ,  H01S3/1666 ,  H01S3/1673 ,  H01S3/2316 ,  H01S3/2333 ,  H01S3/2375 ,  H01S5/06216 ,  H01S5/12 ,  H01S2301/02

Abstract: A laser light-source apparatus includes; a seed light source; a fiber amplifier configured to amplify pulse light output from the seed light source based on gain switching; a solid state amplifier configured to further amplify the resultant pulse light; a nonlinear optical element configured to perform wavelength conversion on the pulse light output from the solid state amplifier; an optical switching element that is disposed between the fiber amplifier and the solid state amplifier and is configured to remove ASE noise; and a control unit. The control unit is configured to control the optical switching element in such a manner that propagation of light is permitted in an output period of the pulse light from the seed light source, and is stopped in a period other than the output period.

Abstract translation: 激光光源装置包括： 种子光源; 光纤放大器，被配置为基于增益切换放大从种子光源输出的脉冲光; 固态放大器，被配置为进一步放大所产生的脉冲光; 被配置为对从固态放大器输出的脉冲光执行波长转换的非线性光学元件; 光开关元件，其设置在所述光纤放大器和所述固态放大器之间，并且被配置为去除ASE噪声; 和控制单元。 控制单元被配置为以这样的方式控制光开关元件，使得在来自种子光源的脉冲光的输出周期中光的传播被允许，并且在除了输出周期之外的时段中停止。

公开(公告)号：US09564731B2

公开(公告)日：2017-02-07

申请号：US13792172

申请日：2013-03-10

Applicant: Fianium Ltd.

Inventor： John Redvers Clowes ,  Anatoly Borisovich Grudinin ,  Ian Michael Godfrey

IPC: H01S3/11 ,  G02B21/16 ,  G02F1/35 ,  H01S3/23 ,  H01S3/10 ,  H01S3/102 ,  H01S3/108 ,  G01N21/64 ,  G02F1/365

CPC classification number: H01S3/11 ,  G01N21/6458 ,  G01N2021/6419 ,  G01N2021/6441 ,  G01N2201/0697 ,  G02B21/16 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3528 ,  H01S3/10 ,  H01S3/10046 ,  H01S3/1024 ,  H01S3/108 ,  H01S3/2308

Abstract: A method of providing supercontinuum illumination in applications involving the excitation of fluorescence, comprising generating, at an optical pump laser, optical pump pulses at a pump pulse repetition rate; selectively controlling with an optical modulator the launch of pump pulses into a nonlinear optical element comprising an optical fiber at a variable, lower repetition rate to thereby selectively control the repetition rate of supercontinuum pulses generated within the optical fiber; and illuminating a sample with supercontinuum pulses to excite fluorescence. The supercontinuum pulses can be wavelength filtered such that the fluorescence is excited with wave length filtered supercontinuum pulses.

Abstract translation: 一种在涉及荧光激发的应用中提供超连续光照明的方法，包括在泵浦激光下以泵浦脉冲重复率产生光泵浦脉冲; 利用光学调制器选择性地控制泵浦脉冲发射到包括可变的较低重复频率的光纤的非线性光学元件中，从而选择性地控制在光纤内产生的超连续谱脉冲的重复率; 并用超连续谱脉冲照射样品以激发荧光。 超连续谱脉冲可以被波长滤波，使得荧光被波长过滤的超连续谱脉冲激发。

公开(公告)号：US09564729B2

公开(公告)日：2017-02-07

申请号：US14437418

申请日：2014-05-05

Applicant: Universitat de València

Inventor： Miguel Vicente Andrés Bou ,  José Luis Cruz Muñoz ,  Antonio Díez Cremades ,  Yury Barmenkov ,  Pere Pérez Millán

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/108 ,  H01S3/094 ,  H01S3/00 ,  H01S3/16 ,  G02F1/35

CPC classification number: H01S3/067 ,  G02F2001/3528 ,  H01S3/0092 ,  H01S3/0675 ,  H01S3/094007 ,  H01S3/108 ,  H01S3/1618

Abstract: The disclosed broadband supercontinuum light emitting device includes a nonlinear optical fiber, a pump system, a cavity, and an active medium. The active medium may comprise an active fiber and may be located inside the cavity. The active medium is configured and arranged, by means of a pumping provided by the pump system, to generate and emit chaotic pulses of laser light towards the nonlinear optical fiber, which excite the nonlinear effects thereof for the generation and emission of supercontinuum light in the form of pulses of light distributed randomly over time. Numerous uses of the device are disclosed for multiple applications that require a low-cost, very bright light source with an adequate broadband spectrum.

Abstract translation: 所公开的宽带超连续谱发光装置包括非线性光纤，泵系统，空腔和活动介质。 活性介质可以包括活性纤维并且可以位于空腔内。 活性介质通过由泵系统提供的泵送来构造和布置，以产生并向该非线性光纤发射激光的混沌脉冲，从而激发其非线性效应，以在其中产生和发射超连续谱光 时间随机分布的光脉冲形式。 对于需要具有足够宽带频谱的低成本，非常亮的光源的多种应用，公开了该器件的多种用途。

公开(公告)号：US09529202B2

公开(公告)日：2016-12-27

申请号：US14259474

申请日：2014-04-23

Applicant: Laser Light Engines, Inc.

Inventor： Ian Lee ,  Barret Lippey ,  John Arntsen

IPC: G02B21/10 ,  G02B27/10 ,  G02B27/48 ,  G02F1/35 ,  G03B21/20 ,  G03B21/00 ,  H04N9/31 ,  H01S3/23 ,  H01S3/108 ,  H04N13/04

CPC classification number: G02B27/48 ,  G02B27/102 ,  G02F1/353 ,  G03B21/005 ,  G03B21/2013 ,  G03B21/2033 ,  G03B21/208 ,  G03B21/2093 ,  G03B33/10 ,  H01S3/0092 ,  H01S3/108 ,  H01S3/2391 ,  H04N9/3155 ,  H04N9/3161 ,  H04N13/363

Abstract: An apparatus and method for controlling the spectrum of stimulated Raman scattering that is used for despeckling of digitally projected images. The stimulated Raman scattering is utilized to add wavelength diversity for reduced speckle and to change the color of the light to a more desirable combination of wavelengths. Digital projection with color-sequential projectors may be enabled by alternately switching the Raman spectrum between green and red. Improved projector transmission may be achieved by minimizing the amount of yellow light generated in the Raman spectrum.

Abstract translation: 用于控制用于数字投影图像的去斑的受激拉曼散射的光谱的装置和方法。 利用受激拉曼散射来增加减少斑点的波长分集，并将光的颜色改变成更理想的波长组合。 可以通过交替切换绿色和红色之间的拉曼光谱来实现带有顺序投影机的数字投影。 可以通过最小化在拉曼光谱中产生的黄光的量来实现改进的投影仪传输。