公开(公告)号：JP2001103014A

公开(公告)日：2001-04-13

申请号：JP2000241962

申请日：2000-08-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RANKA JINENDRA KUMAR ,  STENTZ ANDREW J

IPC: G02F1/35 ,  G02F1/365 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/17 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02

Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber communication system, using a wavelength converter for a broad-band transmission. SOLUTION: A transmitter 11 outputs signals, including channels λ'1,..., λ'N in a wavelength band outside the bandwidth of an intermediate optical element being a light amplifier 13. These signals are converted into corresponding wavelengths λ1,..., λN by the wavelength converter 21 through a transmission fiber 12. Next, the signals are mapped into the original channels λ'1,..., λ'N by a 2nd wavelength converter 22. The wavelength converters can be based on four-wave mixing(FWM), also uses a secondary nonlinear material, for instance, lithium niobate and can periodically poll it or can use a semiconductor light amplifier.

公开(公告)号：JP2001272568A

公开(公告)日：2001-10-05

申请号：JP2001057542

申请日：2001-03-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RANKA JINENDRA KUMAR ,  WINDELER ROBERT SCOTT

IPC: G02B6/032 ,  G02B6/02 ,  G02B6/036 ,  G02B6/26 ,  G02B6/20 ,  G02B6/22

Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber with which transverse space modes are intrinsically separated from each other even when substantial perturbation exists. SOLUTION: According to an embodiment 1, an MOF is so designed as to simultaneously indicate relatively large abnormal dispersion and the intrinsically separated transverse space modes by forming the diameter of a core region below about 6 μm and making the difference between the effective refractive index of the core region and the effective refractive index of the cladding region greater than about 0.1 (10%). More preferably, the cladding region includes

公开(公告)号：JP2001281490A

公开(公告)日：2001-10-10

申请号：JP2001057561

申请日：2001-03-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RANKA JINENDRA KUMAR ,  REED WILLIAM ALFRED ,  WINDELER ROBERT SCOTT

IPC: G02B6/036 ,  G02B6/02 ,  G02B6/032 ,  G02B6/26 ,  H04B10/00 ,  H04B10/12 ,  G02B6/22 ,  G02B6/20

Abstract: PROBLEM TO BE SOLVED: To provide a microstructure optical fiber for accomplishing distributed compensation. SOLUTION: An optical fiber system is provided with an optical transmitter, an optical receiver and an optical fiber transmission line which optically couples the transmitter and the receiver with each other. The transmission line is provided with a first section having negative dispersion in an operation wavelength #10 larger than about 1300 nm and a second section having a microstructure optical fiber(MOF). The MOF is provided with a relatively large anomalous dispersion in #10 and has a length enough to compensate negative dispersion accumulated in the first section. The MOF is provided with an internal clad area wherein capillary tube-shaped air holes are arranged on the circumference of a core area.

公开(公告)号：JP2000356719A

公开(公告)日：2000-12-26

申请号：JP2000144727

申请日：2000-05-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RANKA JINENDRA KUMAR ,  WINDELER ROBERT SCOTT

IPC: G02B6/42 ,  G02B6/00 ,  G02B6/02 ,  G02B6/032 ,  G02F1/365 ,  H01S3/06 ,  H04B10/02 ,  H04B10/43 ,  G02B6/10 ,  G02B6/16 ,  G02B6/20 ,  H04B10/28

Abstract: PROBLEM TO BE SOLVED: To provide a device which exhibits a relatively large nonlinear interaction at visible and near IR (vis-nir) wavelengths. SOLUTION: A suitably designed optical waveguide exhibits an abnormal (positive) dispersion over the continuous body of the vis-nir wavelength and the fiber 10 exhibits zero dispersion at a visible wavelength (for example, about 760 nm). These characteristics are achieved by mutually matching a core region 12 and the refractive index difference between the core region 12 and a clad 14 (making the core region 12 relatively small and making the refractive index difference relatively large). In a more preferable embodiment, the zero dispersion point occurs at the vis-nir wavelength. For example, the optical waveguide is fine structure fiber 10 having the silica core 12 enclosed by the relative thin inner clad 14 having plural capillary holes 14 and 1 enabling the refractive index waveguide in the core 12. The patterns of the cross sections of the holes are for example, hexagonal or triangular.

公开(公告)号：US6393178B2

公开(公告)日：2002-05-21

申请号：US77369601

申请日：2001-02-01

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RANKA JINENDRA KUMAR ,  REED WILLIAM ALFRED ,  WINDELER ROBERT SCOTT

IPC: G02B6/036 ,  G02B6/02 ,  G02B6/032 ,  G02B6/26 ,  H04B10/00 ,  H04B10/12

CPC classification number: G02B6/02366 ,  B82Y20/00 ,  G02B6/02266 ,  G02B6/29377

Abstract: A fiber optic system comprises an optical transmitter, an optical receiver, and an optical fiber transmission path that optically couples the transmitter and the receiver to one another. The transmission path includes a first section that has negative dispersion at an operating wavelength lambd0 greater than about 1300 nm and a second section that includes a MOF. The MOF has relatively large anomalous dispersion at lambd0 and is sufficiently long to compensate the accumulated negative dispersion in the first section. In one embodiment the MOF comprises a core, a lower index cladding that includes one or more layers of air holes surrounding the core, characterized in that the diameter of the core is less than about 8 mum and the difference in effective refractive index between the core and cladding is greater than about 0.1 (10%). Preferably, the cladding contains no more than 2 layers of air holes and the distance between the nearest edges of adjacent air holes is less than about 1 mum.

Abstract translation: 光纤系统包括光发射机，光接收机和将发射机和接收机彼此光耦合的光纤传输路径。 传输路径包括在大于约1300nm的工作波长lambd0处具有负色散的第一部分和包括MOF的第二部分。 MOF在lambd0处具有相对较大的异常色散，并且足够长以补偿第一部分中的累积负色散。 在一个实施例中，MOF包括芯，低折射率包层，其包括围绕芯的一层或多层空气孔，其特征在于，芯的直径小于约8μm，并且芯的有效折射率差 并且包层大于约0.1（10％）。 优选地，包层包含不超过2层的气孔，并且相邻气孔的最近边缘之间的距离小于约1um。

公开(公告)号：DE60036989T2

公开(公告)日：2008-08-28

申请号：DE60036989

申请日：2000-07-31

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RANKA JINENDRA KUMAR ,  STENTZ ANDREW JOHN

IPC: G02F1/35 ,  H04B10/17 ,  G02F1/365 ,  G02F2/00 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02

Abstract: The present invention uses wavelength conversion to increase the bandwidth of optical communication systems. In an exemplary embodiment, a combination of wavelength conversion and amplification with a discrete optical amplifier (OA) to allow communications systems to operate in wavelength bands lambda ' outside the gain bandwidth of the OA. A transmitter launches signal channels ( lambda 1', lambda 2',..., lambda 'N) that are outside the gain bandwidth lambda . A wavelength conversion device upstream of the amplifier maps channels lambda '1, lambda '2,... lambda 'N to corresponding wavelengths lambda 1, lambda 2, ... lambda N within lambda . The OA directly amplifies the converted signals and a second wavelength conversion device downstream of the amplifier maps the amplified signals back to the original channels lambda '1, lambda '2,... lambda 'N. This increases the capacity of the optical communication systems by facilitating the use of both signals that lie within the OA gain bandwidth lambda and signals that can be converted to wavelengths within lambda . Associated wavelength converters, transmitters and receivers are also described. This approach applies not only to the use of EDFAs, but also to gain-flattening elements, dispersion-compensating fibers, variable attenuators, and any intermediate components having bandwidths smaller than the transmission fiber.

公开(公告)号：DE60036989D1

公开(公告)日：2007-12-20

申请号：DE60036989

申请日：2000-07-31

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RANKA JINENDRA KUMAR ,  STENTZ ANDREW JOHN

IPC: G02F1/35 ,  H04B10/17 ,  G02F1/365 ,  G02F2/00 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02

Abstract: The present invention uses wavelength conversion to increase the bandwidth of optical communication systems. In an exemplary embodiment, a combination of wavelength conversion and amplification with a discrete optical amplifier (OA) to allow communications systems to operate in wavelength bands lambda ' outside the gain bandwidth of the OA. A transmitter launches signal channels ( lambda 1', lambda 2',..., lambda 'N) that are outside the gain bandwidth lambda . A wavelength conversion device upstream of the amplifier maps channels lambda '1, lambda '2,... lambda 'N to corresponding wavelengths lambda 1, lambda 2, ... lambda N within lambda . The OA directly amplifies the converted signals and a second wavelength conversion device downstream of the amplifier maps the amplified signals back to the original channels lambda '1, lambda '2,... lambda 'N. This increases the capacity of the optical communication systems by facilitating the use of both signals that lie within the OA gain bandwidth lambda and signals that can be converted to wavelengths within lambda . Associated wavelength converters, transmitters and receivers are also described. This approach applies not only to the use of EDFAs, but also to gain-flattening elements, dispersion-compensating fibers, variable attenuators, and any intermediate components having bandwidths smaller than the transmission fiber.