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：WO2017108061A1

公开(公告)日：2017-06-29

申请号：PCT/DK2016/050460

申请日：2016-12-22

Applicant: NKT PHOTONICS A/S

Inventor： LYNGSØE, Jens Kristian ,  JAKOBSEN, Christian ,  MICHIELETTO, Mattia

IPC: G02B6/032

CPC classification number: G02B6/02328 ,  G02B6/02338 ,  G02B6/02366

Abstract: A hollow core photonic crystal fiber (PCF) comprising an outer cladding region and 7 hollow tubes surrounded by the outer cladding region. Each of the hollow tubes is fused to the outer cladding to form a ring defining an inner cladding region and a hollow core region surrounded by the inner cladding region. The hollow tubes are not touching each other, but are arranged with distance to adjacent hollow tubes. The hollow tubes each have an average outer diameter d2 and an average inner diameter d1, wherein d1/d2 is equal to or larger than about 0.8, such as equal to or larger than about 0.85, such as equal to or larger than about 0.9. Also a laser system is disclosed.

Abstract translation: 中空芯光子晶体光纤（PCF）包括外包层区域和由外包层区域包围的7个中空管。 将每个中空管熔合到外包层上以形成限定内包层区域和由内包层区域围绕的中空芯区域的环。 中空管彼此不接触，但与相邻中空管间隔开距离布置。 中空管各自具有平均外径d2和平均内径d1，其中d1 / d2等于或大于约0.8，例如等于或大于约0.85，如等于或大于约0.9。 还公开了一种激光系统。

公开(公告)号：WO2017108060A1

公开(公告)日：2017-06-29

申请号：PCT/DK2016/050459

申请日：2016-12-22

Applicant: NKT PHOTONICS A/S

Inventor： ALKESKJOLD, Thomas Tanggaard ,  LYNGSØE, Jens Kristian ,  JAKOBSEN, Christian ,  MAACK, Martin Dybendal ,  MICHIELETTO, Mattia ,  PAPIOR, Sidsel Rübner

IPC: G02B6/36

CPC classification number: G02B6/3833 ,  G02B6/02314 ,  G02B6/02328

Abstract: The invention comprises a photonic crystal fiber (PCF) assembly comprising a PCF and at least one ferrule structure. The PCF has a center axis and comprises a core region and a cladding region and a first fiber end section with a first fiber end. The ferrule structure has a center axis and is mounted to the first fiber end section. The ferrule structure comprises an inner ferrule arrangement and an outer ferrule arrangement surrounding the first fiber end section. The inner ferrule arrangement comprises an inner ferrule front section proximally to the first fiber end and an inner ferrule rear section distally to the first fiber end, and each of the inner ferrule sections have an inner diameter and in at least a length thereof fully surrounds the PCF. The inner ferrule rear section is anchored in an anchor length section to the first fiber end section and the inner ferrule front section supports the first fiber end section proximally to the first fiber end.

Abstract translation: 本发明包括光子晶体光纤（PCF）组件，其包括PCF和至少一个套箍结构。 PCF具有中心轴并且包括芯区域和包层区域以及具有第一光纤端部的第一光纤端部。 套箍结构具有中心轴线并安装到第一光纤端部。 套箍结构包括内套箍装置和围绕第一光纤末端部分的外套箍装置。 内套圈装置包括在第一光纤端部附近的内套圈前部和在第一光纤端部的远端的内套圈后部，并且每个内套圈部分具有内径并且在其至少一段长度上完全包围 PCF。 内套圈后部锚固在第一光纤端部的锚定长度部分中，并且内套圈前部将第一光纤端部支撑在第一光纤端部附近。

公开(公告)号：WO2017186246A1

公开(公告)日：2017-11-02

申请号：PCT/DK2017/050127

申请日：2017-04-27

Applicant: NKT PHOTONICS A/S

Inventor： JAKOBSEN, Christian ,  SIMONSEN, Harald Roager ,  LYNGSØE, Jens Kristian ,  MICHIELETTO, Mattia

IPC: C03B37/02 ,  C03B37/012 ,  G02B6/02

Abstract: A method of producing a microstructured optical fiber is disclosed. The method includes providing a preform and drawing the preform. The preform has a center axis, a length and a first end and a second end and has at least one longitudinal hole extending lengthwise. The method includes inserting a first end of a pressure tube into the hole of the preform at the first end of the preform and subjecting the hole of the preform to a controlled pressure via the pressure tube during the drawing.

Abstract translation: 公开了一种生产微结构光纤的方法。 该方法包括提供预制件并拉制预制件。 预制件具有中心轴线，长度以及第一端部和第二端部并且具有至少一个纵向延伸的纵向孔。 该方法包括将压力管的第一端插入预成型件的第一端处的预成型件的孔中，并在拉伸过程中使预成型件的孔经由压力管经受受控压力。

公开(公告)号：EP4116747A1

公开(公告)日：2023-01-11

申请号：EP21184622.5

申请日：2021-07-08

Applicant: NKT Photonics A/S

Inventor： MICHIELETTO, Mattia ,  PEDERSEN, Martin Erland Vestergaard

IPC: G02B6/02

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, n c , at an optical signal wavelength, λ 1 ;
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, n b , and a plurality of inner cladding features arranged in said background material, wherein at least 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, n r , 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, n 1 , which is lower than or equal to the effective refractive index of the fundamental core mode, n c , at said optical signal wavelength, λ 1 ,
wherein at least 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, n b , 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：EP3448818A1

公开(公告)日：2019-03-06

申请号：EP17788848.4

申请日：2017-04-27

Applicant: NKT Photonics A/S

Inventor： JAKOBSEN, Christian ,  SIMONSEN, Harald Roager ,  LYNGSØE, Jens Kristian ,  MICHIELETTO, Mattia

IPC: C03B37/02 ,  C03B37/012 ,  G02B6/02

公开(公告)号：EP4367537A1

公开(公告)日：2024-05-15

申请号：EP22734328.2

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

CPC classification number: G02B6/02352 ,  G02B6/02361 ,  G02B6/02333 ,  H01S3/06754 ,  G02B6/02214 ,  G02B6/02009 ,  C03B2203/4220130101 ,  C03B2203/1420130101 ,  C03B2201/0820130101 ,  C03B2201/2020130101 ,  C03B2201/3120130101 ,  C03B2201/3420130101 ,  H01S3/06741

公开(公告)号：EP4009087A1

公开(公告)日：2022-06-08

申请号：EP22153290.6

申请日：2016-12-22

Applicant: NKT Photonics A/S

Inventor： ALKESKJOLD, Thomas Tanggaard ,  LYNGSØE, Jens Kristian ,  JAKOBSEN, Christian ,  MAACK, Martin Dybendal ,  MICHIELETTO, Mattia ,  PAPIOR, Sidsel Rübner

IPC: G02B6/38 ,  G02B6/02 ,  G02B6/42

Abstract: A photonic crystal fiber (PCF) assembly comprises a PCF and at least one ferrule structure, said PCF has a center axis and comprises a core region and a cladding region and a first fiber end section (21) with a first fiber end (21a), said ferrule structure has a center axis and is mounted to said first fiber end section (21), the PCF center axis at the first fiber end section (21) and the ferrule structure center axis being parallel or coincident, said ferrule structure comprises an inner ferrule arrangement and an outer ferrule arrangement (5) surrounding the first fiber end section (21), said inner ferrule arrangement comprises an inner ferrule front section (22) proximally to said first fiber end (21a) and an inner ferrule rear section (23) distally to said first fiber end (21a), said inner ferrule front section (22) and said inner ferrule rear section (23) are not directly fixed to each other and the outer ferrule arrangement is configured to hold the inner ferrule front section and the inner ferrule rear section in position relative to each other, each of said inner ferrule sections (22, 23) have an inner diameter and in at least a length thereof fully surrounds the PCF, said inner ferrule rear section (23) is anchored in an anchor length section (23b) to said first fiber end section (21) and said inner ferrule front section (12) supports said first fiber end section (21) proximally to said first fiber end (21a),
wherein said first fiber end section (21) has at least one mode stripper length section (27, 37), and
wherein said mode stripper length section (27, 37) comprises a mode stripping high index material and/or a scattering layer applied in contact with the PCF at said mode stripper length section (27, 37) and/or said fiber in said mode stripper length section (27, 37) has a roughness Ra value of at least about 0.1 µm.

公开(公告)号：EP3394652A1

公开(公告)日：2018-10-31

申请号：EP16877821.5

申请日：2016-12-22

Applicant: NKT Photonics A/S

Inventor： ALKESKJOLD, Thomas Tanggaard ,  LYNGSØE, Jens Kristian ,  JAKOBSEN, Christian ,  MAACK, Martin Dybendal ,  MICHIELETTO, Mattia ,  PAPIOR, Sidsel Rübner

IPC: G02B6/36

CPC classification number: G02B6/3833 ,  G02B6/02314 ,  G02B6/02328

Abstract: The invention comprises a photonic crystal fiber (PCF) assembly comprising a PCF and at least one ferrule structure. The PCF has a center axis and comprises a core region and a cladding region and a first fiber end section with a first fiber end. The ferrule structure has a center axis and is mounted to the first fiber end section. The ferrule structure comprises an inner ferrule arrangement and an outer ferrule arrangement surrounding the first fiber end section. The inner ferrule arrangement comprises an inner ferrule front section proximally to the first fiber end and an inner ferrule rear section distally to the first fiber end, and each of the inner ferrule sections have an inner diameter and in at least a length thereof fully surrounds the PCF. The inner ferrule rear section is anchored in an anchor length section to the first fiber end section and the inner ferrule front section supports the first fiber end section proximally to the first fiber end.

公开(公告)号：EP3394650A1

公开(公告)日：2018-10-31

申请号：EP16877822.3

申请日：2016-12-22

Applicant: NKT Photonics A/S

Inventor： LYNGSØE, Jens Kristian ,  JAKOBSEN, Christian ,  MICHIELETTO, Mattia

IPC: G02B6/032

CPC classification number: G02B6/02328 ,  G02B6/02338 ,  G02B6/02366

Abstract: A hollow core photonic crystal fiber (PCF) comprising an outer cladding region and 7 hollow tubes surrounded by the outer cladding region. Each of the hollow tubes is fused to the outer cladding to form a ring defining an inner cladding region and a hollow core region surrounded by the inner cladding region. The hollow tubes are not touching each other, but are arranged with distance to adjacent hollow tubes. The hollow tubes each have an average outer diameter d2 and an average inner diameter d1, wherein d1/d2 is equal to or larger than about 0.8, such as equal to or larger than about 0.85, such as equal to or larger than about 0.9. Also a laser system is disclosed.