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    SYSTEM HAVING RAMAN FIBER LASER
    2.
    发明专利
    SYSTEM HAVING RAMAN FIBER LASER 失效

    公开(公告)号：JPH1154853A

    公开(公告)日：1999-02-26

    申请号：JP15700798

    申请日：1998-06-05

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： REED WILLIAM ALFRED ,  STENTZ ANDREW J ,  STRASSER THOMAS A

    IPC: G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/30

    Abstract: PROBLEM TO BE SOLVED: To provide a cascaded Raman laser(CRL), which significantly increases conversion efficiency and is highly reliable. SOLUTION: In a CRL 30, which receives pumping radiation light of a wavelength λp and radiates emitted light of a wavelength λn which is longer than the wavelength λp , the CRL 30 consists of an optical fiber, which has L long cavities 21 arranged between an input region 34 and an output region 35 and has a certain length, the above input and output regions 34 and 35 respectively have fiber plug gratings having center wavelengths of λ1

    DEVICE CONTAINING MULTI-MODE OPTICAL FIBER
    3.
    发明专利
    DEVICE CONTAINING MULTI-MODE OPTICAL FIBER 失效

    公开(公告)号：JP2002006165A

    公开(公告)日：2002-01-09

    申请号：JP2000171035

    申请日：2000-06-07

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GOLOWICH STEVEN EUGENE ,  REED WILLIAM ALFRED ,  RITGER ALBERT JOHN

    IPC: G02B6/028 ,  G02B6/18

    Abstract: PROBLEM TO BE SOLVED: To provide a multi-mode fiber having an improved refractive index profile in low-mode by improving the behavior of high-mode propagation in a optical fiber and compensating for the existence of a center dip. SOLUTION: The optical fiber of this invention has a core and a cladding layer surrounding the core. The interface between the cladding layer and the core forms a boundary region and the core has a modified refractive index profile which is characterized by an alpha-profile corrected by at least one among the methods of (a) combining a step formed in the refractive index and linear correction adjacent the boundary region (b) combining of refractive index ripple and linear correction adjacent the boundary region (c) being to have refractive index ridge adjacent the center of the fiber.

    PRODUCTION OF GERMANIUM-DOPED OPTICAL FIBER
    4.
    发明专利
    PRODUCTION OF GERMANIUM-DOPED OPTICAL FIBER 失效

    公开(公告)号：JPH10139463A

    公开(公告)日：1998-05-26

    申请号：JP25086197

    申请日：1997-09-16

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CLAYTON JANE BILECKY ,  ESKILDSEN LARS ERIK ,  HANSEN PER BANG ,  HEADLEY CLIFFORD ,  REED WILLIAM ALFRED

    IPC: G02B6/00 ,  C03B37/025 ,  C03B37/027 ,  G02B6/02

    Abstract: PROBLEM TO BE SOLVED: To obtain an optical fiber reducing a loss caused by a stimulated Brillouin scattering by preparing an optical fiber perform having a Ge-doped core, heating a part thereof and performing a draw-forming at a specific drawing force. SOLUTION: This optical fiber is produced by preparing a perform as a glass rod having 1m length and 20-200mm outer diameter and an inside core as a high purity and a low loss silicate containing Ge, having 1-5mm diameter, and an outside clad layer as a glass layer having a lower refractive index than that of the inside core. The end part of the perform is heated at a high temperature and the optical fiber is drawn. The drawing force is changed in accordance with shapes of a sine wave, a triangular wave or a trapezoidal wave along the lengthwise direction of the fiber, and a minimum and a maximum forces therefor are 10-50g and 150-150g respectively. A preferable wave length of the sine wave is 3-30km, a preferable length of the base of the triangular wave is 3-30km, that of the base (longer side) of the trapezoidal wave is 3-15km, and that of the upside (shorter side) thereof is 1-13km.

    ELEMENT INCLUDING IMPROVED OPTICAL FIBER RAMAN DEVICE IN TANDEM CONNECTION
    7.
    发明专利
    ELEMENT INCLUDING IMPROVED OPTICAL FIBER RAMAN DEVICE IN TANDEM CONNECTION 失效

    公开(公告)号：JPH11289133A

    公开(公告)日：1999-10-19

    申请号：JP4411199

    申请日：1999-02-23

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： LEGRANGE JANE DEBORAH ,  REED WILLIAM ALFRED ,  WALKER KENNETH LEE

    IPC: G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/08 ,  H01S3/30 ,  H04B10/17

    Abstract: PROBLEM TO BE SOLVED: To avoid the attenuation caused by multiple reflectors, by a method wherein multiple narrow band reflectors having reflecting power curve in the half maximum time full width larger than a pertinent Stokes shift are arranged so as to provide a plurality of wavelength with optical cavities. SOLUTION: In an optical fiber RAMAN device composed of an optical fiber 11 in a specific length, a pumpping source 12 and a set of narrow band reflectors 13, one each of wide band mirror 21 reflects all wavelengths entered thereinto. Next, pump radiation in wavelength of λp is led into the optical fiber 11 in a specific length to be selected to reflect the radiation in respective wavelengths λ1...λn, while the wavelength difference in every adjacent two wavelengths corresponds to a Stokes shift as well as a plurality of narrow band reflectors 13 of the device in n>=2 are provided with reflecting power curve respectively having the half maximum time full width not exceeding 20 nm. Furthermore, the wide band reflectors having the half maximum time full width larger than the Stokes shift are arranged so as to form the optical cavities in wavelength of λ1...ν.

    SYSTEM AND DEVICE FOR CASCADED RAMAN RESONATOR
    9.
    发明专利
    SYSTEM AND DEVICE FOR CASCADED RAMAN RESONATOR 失效

    公开(公告)号：JP2000029083A

    公开(公告)日：2000-01-28

    申请号：JP10733099

    申请日：1999-04-15

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： JACOBOVITZ-VESELKA GLORIA R ,  REED WILLIAM ALFRED

    IPC: G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/08 ,  H01S3/30 ,  H04B10/17

    Abstract: PROBLEM TO BE SOLVED: To provide a device which has scalable power and is more independent from an input wavelength (λp). SOLUTION: This device includes optical transmission media 32 which are coupled with a light energy source and at least one pair of gratings (44, 46, 52, 54) prescribing optical cavity for emitting light energy of output wavelength λn, and at least one pair among the gratings is written in the optical transmission media 32 with wavelength which does not correspond to the maximum gain for a shift of Raman Strokes order, the light energy is converted with less efficiency than a case wherein the gratings are written with wavelength corresponding to the maximum gain for the shift of Raman Stokes order, and maximum reflection efficiency is generated at the wavelength corresponding to the shift of Raman Stokes order.

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