公开(公告)号：WO2013117199A1

公开(公告)日：2013-08-15

申请号：PCT/DK2013/050036

申请日：2013-02-08

Applicant: NKT PHOTONICS A/S

Inventor： PEDERSEN, Jens E. ,  VARMING, Poul ,  POULSEN, Christian V. ,  FAGERHØJ, Thomas O. ,  GØTH, Bjarke ,  SØRENSEN, Henrik

IPC: H01S3/13 ,  H01S5/0687

CPC classification number: H01S5/0687 ,  G01B9/02001 ,  H01S3/2391 ,  H01S5/02284 ,  H01S5/0654 ,  H01S5/141 ,  H01S5/4087 ,  H01S2301/02

Abstract: The invention relates to a laser device, comprising a laser (500) configured to generate laser light and a laser control module configured to receive, at least a portion of the laser light generated by the laser, to generate a control signal (705) and feed the control signal back to the laser for stabilizing the frequency, wherein the laser control module comprises a tunable frequency discriminating element (704) which is preferably continuously frequency tuneable, and where the laser control module is placed outside the laser cavity.

Abstract translation: 本发明涉及一种激光装置，包括被配置为产生激光的激光器（500）和被配置为接收由激光器产生的激光的至少一部分的激光控制模块，以产生控制信号（705）和 将控制信号反馈给激光器以稳定频率，其中激光控制模块包括可调谐的频率鉴别元件（704），其可优选地连续可频率调节，并且激光控制模块放置在激光腔外部。

公开(公告)号：WO2011160646A1

公开(公告)日：2011-12-29

申请号：PCT/DK2011/050242

申请日：2011-06-27

Applicant: NKT PHOTONICS A/S ,  ALKESKJOLD, Thomas, Tanggaard

Inventor： ALKESKJOLD, Thomas, Tanggaard

IPC: G02B6/032 ,  C03B37/027 ,  H01S3/067

CPC classification number: H01S3/06754 ,  C03B37/0122 ,  C03B2201/34 ,  C03B2203/12 ,  C03B2203/14 ,  C03B2203/23 ,  C03B2203/28 ,  C03B2203/29 ,  C03B2203/42 ,  G02B6/02019 ,  G02B6/02333 ,  G02B6/02338 ,  G02B6/02352 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/0283 ,  H01S3/06733 ,  H01S3/06741 ,  H01S3/08045 ,  H01S3/094007

Abstract: The invention relates to a single-mode optical fiber for guiding an optical signal. The core region of the optical fiber is capable of guiding an optical signal in a fundamental core mode at an optical signal wavelength. A cladding region is arranged to surround the core region and comprises an inner cladding region and an outer cladding region. The inner cladding region comprises a background material and a plurality of inner cladding features arranged in said background material, wherein a plurality of said plurality of inner cladding features are of a first type of feature. The first type of feature comprises an air hole surrounded by a high-index region comprising a high-index material that is larger than the refractive index of the inner cladding background material. The plurality of said first type of feature supports an optical mode with an effective refractive index, n1, which is lower than the effective refractive index of the fundamental core mode at said optical signal wavelength. The optical fiber may comprise an active material and be used as a cladding pumped fiber amplifier.

Abstract translation: 本发明涉及一种用于引导光信号的单模光纤。 光纤的核心区域能够以光信号波长引导基本芯模式的光信号。 包层区域布置成围绕芯区域并且包括内包层区域和外包层区域。 内包层区域包括背景材料和布置在所述背景材料中的多个内包层特征，其中多个所述多个内包层特征是第一类型的特征。 第一类型的特征包括由高折射率区域围绕的空气孔，该高折射率区域包括大于内包层背景材料的折射率的高折射率材料。 多个所述第一类型的特征支持具有有效折射率的光学模式，其在所述光信号波长处低于基本纤芯模式的有效折射率。 光纤可以包括活性材料并用作包层泵浦光纤放大器。

公开(公告)号：WO2009095023A3

公开(公告)日：2009-08-06

申请号：PCT/DK2009/000026

申请日：2009-02-02

Applicant: NKT PHOTONICS A/S ,  PEDERSEN, Morten Østergaard

Inventor： PEDERSEN, Morten Østergaard

IPC: G02F1/365 ,  H01S3/13

Abstract: The invention relates to a system for delivery of light comprising a light source having an output arranged to emit light in an output path said output path comprising an unguided section and an at least partially transmissive optical component wherein said optical component provides at least one residual reflection when the system is in use and a detector system is arranged to detect said residual reflection. The detector is in one embodiment system being arranged to produce at least one feedback response arranged to stabilize the optical output of said light source system. Hereby a feedback may be implemented with little or no reduction of performance.

公开(公告)号：WO2023280712A1

公开(公告)日：2023-01-12

申请号：PCT/EP2022/068284

申请日：2022-07-01

Applicant: NKT PHOTONICS A/S

Inventor： MICHIELETTO, Mattia ,  PEDERSEN, Martin Erland Vestergaard ,  MAACK, Martin ,  JOHANSEN, Mette Marie

IPC: G02B6/02 ,  H01S3/067

Abstract: An optical fiber for guiding an optical signal, said optical fiber having a longitudinal, optical axis (A) and a cross section perpendicular thereto, said optical fiber comprises: a core region (2) being capable of guiding an optical signal in a fundamental core mode with an effective refractive index, nc, at an optical signal wavelength, λ1; a cladding region surrounding the core region, the cladding region comprising an inner cladding region (3) and an outer cladding region (6), said inner cladding region comprising a background material having a refractive index, nb, and a plurality of inner cladding features arranged in said background material, wherein a plurality of said plurality of inner cladding features are of a first type of feature (4), said first type of feature comprising an air hole surrounded by a high-index region comprising a high-index material having a refractive index, nr, that is larger than the refractive index of the inner cladding background material, said first type of feature supports an optical mode with an effective refractive index, n1, which is lower than or equal to the effective refractive index of the fundamental core mode, nc, at said optical signal wavelength, λ1, wherein a plurality of said plurality of inner cladding features are of a second type of feature (5) comprising an air hole in direct contact with the background material having a refractive index, nb, and wherein said inner cladding features are arranged in a substantially hexagonal lattice and the six nearest neighbors surrounding a first type of feature are of said second type of feature, and wherein no first type of feature is surrounded by less than six nearest neighbors of the second type of feature.

公开(公告)号：WO2021219592A1

公开(公告)日：2021-11-04

申请号：PCT/EP2021/060912

申请日：2021-04-27

Applicant: NKT PHOTONICS A/S

Inventor： SMITH, Cameron Lesley Colwell ,  LUPI, Alexandra ,  PEDERSEN, Martin Erland Vestergaard ,  LYNGSØ, Jens Kristian ,  MAACK, Martin D.

IPC: G02F1/35 ,  G02F1/365

Abstract: An optical source (100) comprising a supercontinuum generation apparatus comprising a pump light source (102), a twisted photonic crystal fibre, PCF, (104) and a wideband quarter-wave retarder (106). The pump light source is arranged to provide circularly polarised pump light. The twisted PCF is arranged to receive the pump light and to convert the pump light into circularly polarised supercontinuum light. The wideband quarter-wave retarder is arranged to convert the circularly polarised supercontinuum light into linearly polarised supercontinuum light. The optical source may additionally comprise a wavelength tunable bandpass optical filter arranged to transmit the linearly polarised supercontinuum light at wavelengths within a selected range.

公开(公告)号：WO2016045678A1

公开(公告)日：2016-03-31

申请号：PCT/DK2015/050260

申请日：2015-09-03

Applicant: NKT PHOTONICS A/S

Inventor： LYNGSØE, Jens Kristian ,  ALKESKJOLD, Thomas

IPC: G02B6/02

CPC classification number: G02F1/365 ,  G02B6/02295 ,  G02B6/02338 ,  G02B6/02366 ,  G02F2001/3528

Abstract: The invention relates to a micro-structured optical fiber suitable for supercontinuum generation a preform therefor, a method of production thereof and a supercontinuum light source. The optical fiber comprises a core microstructured length section L cm , which comprises: a micro-structured core region comprising at least a first region forming a central part of the core region and a second region surrounding the first region; and a cladding surrounding the core region; wherein the first and second regions are of a first and second silica material, respectively, which differs with respect to composition, and wherein the core region in at least a length part of the core microstructured length section L cm has a cross sectional diameter D cm perpendicular to the longitudinal axis which is about 8 μm or less.

Abstract translation: 本发明涉及一种适用于超连续谱产生的微型结构光纤，其制备方法，其生产方法和超连续光源。 该光纤包括芯微结构长度部分Lcm，其包括：微结构化核心区域，其包括至少形成芯区域的中心部分的第一区域和围绕该第一区域的第二区域; 以及围绕所述芯部区域的包层; 其中所述第一和第二区域分别是相对于组成不同的第一和第二二氧化硅材料，并且其中所述芯微结构长度段Lcm的至少长度部分中的芯区域具有垂直于 纵轴为8μm以下。

公开(公告)号：WO2015003715A1

公开(公告)日：2015-01-15

申请号：PCT/DK2014/050206

申请日：2014-07-07

Applicant: NKT PHOTONICS A/S

Inventor： JOHANSEN, Jeppe ,  BANG, Ole ,  LARSEN, Casper ,  FEUCHTER, Thomas ,  THOMSEN, Carsten, L. ,  ANDERSEN, Thomas Vestergaard

IPC: G02B6/032 ,  G02F1/383 ,  H01S3/07

CPC classification number: G02B6/02376 ,  G01B9/02091 ,  G02B6/02214 ,  G02B6/02333 ,  G02B6/02347 ,  G02B6/02361 ,  G02B6/255 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2202/32 ,  H01S3/06725 ,  H01S3/06729 ,  H01S3/094042 ,  H01S3/094076 ,  H01S3/1106

Abstract: The invention relates to a microstructured optical fiber for generating incoherent supercontinuum light upon feeding of pump light. The microstructured optical fiber has a first section and a second section. A cross-section through the second section perpendicularly to a longitudinal axis of the fiber has a second relative size of microstructure elements and preferably a second pitch that is smaller than a blue edge pitch for the second relative size of microstructure elements. The invention also relates to an incoherent supercontinuum source comprising a microstructured optical fiber according to the invention.

Abstract translation: 本发明涉及一种用于在馈送泵浦光时产生非相干超连续光的微结构光纤。 微结构光纤具有第一部分和第二部分。 通过垂直于纤维的纵向轴线的第二部分的横截面具有微结构元件的第二相对尺寸，并且优选地具有小于用于第二相对尺寸的微结构元件的蓝色边缘间距的第二间距。 本发明还涉及包含根据本发明的微结构光纤的非相干超连续谱源。

公开(公告)号：WO2010020251A1

公开(公告)日：2010-02-25

申请号：PCT/DK2009/000185

申请日：2009-08-18

Applicant: NKT PHOTONICS A/S ,  ALKESKJOLD, Thomas Tanggaard

Inventor： ALKESKJOLD, Thomas Tanggaard

IPC: G02B6/02 ,  H01S3/067 ,  C03B37/027

CPC classification number: H01S3/06754 ,  B29D11/00663 ,  C03B37/01217 ,  C03B37/0122 ,  C03B2201/34 ,  C03B2203/22 ,  C03B2203/24 ,  C03B2203/30 ,  C03B2203/31 ,  C03B2203/32 ,  C03B2203/42 ,  G02B6/02333 ,  G02B6/02361 ,  H01S3/06729 ,  H01S3/06741

Abstract: An optical fibre that use index-guidance formed with a low index cladding or a microstructured cladding using voids/holes or low index features (404) together with multiple high index resonant cladding features (1205, 1206). One to three resonant cross sectional extending structure act as a filter by resonantly coupling light out to part of the cladding (1202) or other structures (fx. a high index outer cladding ring) that acts as light sink(s) at one to three wavelength when using one to three materials or features with different size, shape, refractive index profile or normalized frequency parameter. The fibre can be asymmetrical. The fibre can be adapted for suppression of higher order modes (HOM) and/or guiding light in a narrow spectral wavelength range and act as a band pass filter. For enhancing out-coupling the high index features can be arranged along two intersecting lines tangentially positioned in relation to the core and along a line that extends from the core and intersects the tangentially positioned lines. Light absorbing material such as samarium can be used in the light sink. The fibre can be used in a fibre amplifier or fibre laser.

Abstract translation: 一种光纤，其使用由低折射率包层或微结构化包层形成的折射率引导，使用空隙/孔或低折射率特征（404）以及多个高折射率共振覆层特征（1205,1206）。 一至三个谐振截面延伸结构通过将光共振地耦合到一部分包层（1202）或其它结构（fx。高折射率外包层环），作为一个或三个光吸收体 使用一到三种材料或具有不同尺寸，形状，折射率分布或归一化频率参数的特征时的波长。 纤维可以是不对称的。 光纤可适用于抑制高阶模式（HOM）和/或引导窄光谱波长范围内的光，并充当带通滤光器。 为了增强外耦合，可以沿着相对于芯切线定位的两条相交线并且沿着从芯延伸并与切线定位的线相交的线布置高折射率特征。 光吸收材料如钐可用于光接收器。 光纤可用于光纤放大器或光纤激光器。

公开(公告)号：WO2010003422A2

公开(公告)日：2010-01-14

申请号：PCT/DK2009/050158

申请日：2009-07-03

Applicant: NKT PHOTONICS A/S ,  THOMSEN, Carsten L. ,  ANDERSEN, Thomas Vestergaard

Inventor： THOMSEN, Carsten L. ,  ANDERSEN, Thomas Vestergaard

CPC classification number: G02F1/365 ,  A61B1/06 ,  G02B6/0006 ,  G02B6/02319 ,  G02B6/02333 ,  G02B6/02342 ,  G02B6/4296 ,  G02B6/4492 ,  G02F2001/3528 ,  H01S3/302

Abstract: The invention relates to an optical fiber comprising a core and a cladding comprising a core material and a cladding material, respectively, wherein said fiber is a non-linear microstructured optical fiber, said microstructured optical fiber being obtainable by a method comprising loading with hydrogen and/or deuterium and optionally anneal and/or irradiation hereby the lifetime of the fiber may be extended in high power applications.

Abstract translation: 本发明涉及一种包括芯和包层的光纤，包括芯材和包层材料，其中所述光纤是非线性微结构光纤，所述微结构光纤可通过包括加载氢气和 /或氘，并且任选地退火和/或照射，因此纤维的寿命可以在大功率应用中延伸。

公开(公告)号：WO2021121531A1

公开(公告)日：2021-06-24

申请号：PCT/DK2020/050404

申请日：2020-12-21

Applicant: NKT PHOTONICS A/S

Inventor： ANDERSEN, Thomas Vestergaard

IPC: G02F1/35 ,  G02F1/365 ,  H01S3/00 ,  G02F1/3528 ,  G02F2201/20 ,  G02F2201/205 ,  H01S3/005 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06754 ,  H01S3/1003 ,  H01S3/10046

Abstract: A light source (1), comprising: a pulse generator (2) for providing an initial sequence of light pulses (5), the initial sequence of light pulses having a selected number of light pulses in a selected time period, the pulse generator further comprising an optical source (3) for producing optical pulses; and a modulator (4) in communication with the optical source (3) for increasing or decreasing the selected number of pulses provided by the pulse generator in the selected time period; first and second optical arms (7,8), for propagating, respectively, first and second sequences of light pulses (10,11), each derived from the initial sequence of light pulses (5), wherein the first optical arm (7) comprises a first manipulator (9) configured to generate the first sequence of light pulses (10) from the initial sequence of light pulses (5), the first sequence of light pulses (10) having a first number of light pulses within the selected time period, wherein the first number is higher than the initial number, wherein the second sequence of light pulses (11) has a second number of light pulses within the selected time period, wherein the second number is different than or equal to the initial number, wherein the light source further comprises a nonlinear optical element (14) arranged to receive the first sequence of light pulses (10) or the second sequence of light pulses (11), and an optical switch (6) arranged to switch either the first sequence of light pulses (10) or the second sequence of light pulses(11) for reception by the nonlinear optical element (14).