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公开(公告)号：JP2000098268A
公开(公告)日：2000-04-07
申请号：JP26975299
申请日：1999-09-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , ESPINDOLA ROLANDO PATRICIO , JIN SUNGHO , MAVOORI HAREESH , STRASSER THOMAS ANDREW
Abstract: PROBLEM TO BE SOLVED: To obtain a device which is programmable for the purpose of a wavelength shift and dispersion correction of colors and may be latched by regulating the spacings between grating elements by the expansion or contraction of a body by a magnetic field and the consequently induced elastic strain and regulating the wavelength corresponse of the device. SOLUTION: This wavelength shift device includes a waveguide of a certain length, such as an optical fiber 11, having a grating region 12, the slender magnetostriction effect body 14 bonded along the length of the gratings 12 to the gratings in the bond region 13 and a source for exposing the body 14 to the magnetic field. A source for supplying the magnetic field, for example, a solenoid 19 is installed in proximity to the body 14 or a magnet 15 or both thereof to magnetize the magnet 15 and to distort the body 14. The body 14 is expanded or shrunk by the magnetic field, by which the elastic strain is induced in the body 14 and the spacings between the grating elements and the wavelength response of the device are regulated.
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公开(公告)号：JP2001094182A
公开(公告)日：2001-04-06
申请号：JP2000239401
申请日：2000-08-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ALES GAELLE , ESPINDOLA ROLANDO PATRICIO , STRASSER THOMAS ANDREW
Abstract: PROBLEM TO BE SOLVED: To realize a high-power and wide-band SFS(superfluorescence fiber light source). SOLUTION: A light source 10 has first and second SE-RE doped optical fibers 11 and 12. These optical fibers are arranged, so that light can be propagated in the axial direction of the light source 10 from the fiber 11 to the fiber 12. Moreover, the light source 10 has a coupler 17 to couple a light source 14 of a first pumping light with the first pumping light in the downstream direction of the fiber 11. Moreover, the light source 10 has a light source 15 of second pumping light, a coupler 18 for coupling the second pumping light with the film 12 in the upstream direction of the light source 10 and an optical isolator 13 arranged between the films 11 and 12 so that the light, which is propagated from the fiber 12 to the upstream direction, hardly reaches the fiber 11.
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公开(公告)号：JP2000221342A
公开(公告)日：2000-08-11
申请号：JP2000016484
申请日：2000-01-26
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ADAMS LAURA ELLEN , EGGLETON BENJAMIN JOHN , ESPINDOLA ROLANDO PATRICIO , JIN SUNGHO , MAVOORI HAREESH , ROGERS JOHN A , STRASSER THOMAS ANDREW
IPC: G02B5/18 , G02B1/10 , G02B6/02 , G02B6/34 , G02B26/00 , G02F1/01 , H04B10/02 , H04B10/18 , H04B10/43 , G02B6/10 , H04B10/28
Abstract: PROBLEM TO BE SOLVED: To make it possible to use an optical grating device as a device for regulatable dispersion correction and to selectively change the characteristics and performance thereof by constituting the device in such a manner that the spacings between grating elements can be changed by a variable coating when strain in an axial direction is impressed to a waveguide. SOLUTION: A movable magnet 15a is directly added to the fiber coating 14 adjacently to a grating region in order to induce the strain in the fiber. A magnet 15b which does not move is added to a fixed base material 16 or a guide rail in a bond region 13b. At this time, the magnet 15a induces the shift in a wavelength distribution having a possibility useful to some of applications of dispersion correction. When the strain in the axial direction is impressed to the waveguide by the magnet moment induced in the magnets 15a and 15b, the spacings between the grating elements may be changed by the variable coating.
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公开(公告)号：JPH10123338A
公开(公告)日：1998-05-15
申请号：JP26596097
申请日：1997-09-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ATKINS ROBERT MICHAEL , ESPINDOLA ROLANDO PATRICIO , SIMOFF DEBRA ANN
Abstract: PROBLEM TO BE SOLVED: To make it possible to write refractive index gratings into an optical fiber which is as coated by preparing the specific silica-base optical fiber having a Ge-doped core exposed to a photosensitive agent and exposing this optical fiber to chemical rays in such a manner that the refractive index gratings are formed in the core. SOLUTION: The silica-base optical fiber 55 (having the core doped with the Ge) exposed to the photosensitive agent is prepd. This optical fiber 55 is exposed to the chemical rays 52 in such a manner that the gratings are formed in the core. The optical fiber 55 has a sufficient concn. of germanium oxide defect centers. This concn. is the concn. at which the fiber having the photosensitivity of at least 2 times and more preferably >=10 times the photosensitivity of the other optical fibers having the same performance may be provided. The photosensitivity is defined by Δn/(dosing quantity of the chemical rays) and Δn indicates the refractive index change by exposure of the optical fiber 55 to the prescribed quantity of the chemical rays 52.
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公开(公告)号：JP2000244040A
公开(公告)日：2000-09-08
申请号：JP2000035783
申请日：2000-02-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ESPINDOLA ROLANDO PATRICIO , STRASSER THOMAS ANDREW , WESTBROOK PAUL STEPHEN , WYSOCKI PAUL FRANCIS
Abstract: PROBLEM TO BE SOLVED: To realize an improved performance comparable to that of a normal fiber amplifier by an arrangement wherein an optical fiber has a figure of merit higher than a specified value which is the integration in a specified wavelength range of the total wavelength loss of a filter means. SOLUTION: A plurality of L band fiber amplifiers (EDFA) 30 each having a C band removing filter in an Er doped fiber selected to attain an amplifier having a figure of a merit (FOM) higher than 400 dB.nm are arranged. The FOM is the integral of FL (λ) over the wavelength region of 1520-1565 nm and the FL (λ) is the total loss of λ by a C band removing filter at a length L of the Er doped fiber. Several C band removing filters 351, 352, 353 are arranged in the EDF. The upstream filter 351 is located at a specified distance L1 from the input end of the EDF, the filter 352 is located at a specified distance L2 from the filter 351 and the filter 353 is spaced apart by a specified distance L3 from the filter 352.
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Patent Agency Ranking
公开(公告)号：JP2000098316A
公开(公告)日：2000-04-07
申请号：JP26967499
申请日：1999-09-24
Applicant: LUCENT TECHNOLOGIES INC
Abstract: PROBLEM TO BE SOLVED: To make it possible to obtain a novel structure of a tunable optical fiber element which does not require an intricate structure and the impression of strains to the fiber by forming a variable refractive index(VRI) region arranged within a cladding which is adjacent to diffraction gratings and is in extreme proximity to a core so as to have a refractive index lower than the refractive index of the core and correcting the refractive index of the mode propagating along the core. SOLUTION: A prescribed section 's' of the fiber 22 constitutes the fiber 22 of a certain length including the VRI region. The VRI region 's' is composed of a material different from that of the core or cladding and the refractive index thereof can be changed from the inside or the outside. A prescribed section including a diffraction grating region 'g' is arranged along the length of the fiber 22. The periodic or quasi-periodic perturbation in the core including the Bragg or long-period diffraction gratings exists in the diffraction grating region 'g'. The diffraction grating region 'g' and the VRI region 's' are partly adjacent to each other and are arranged to overlap each other along the width of the fiber 22.
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公开(公告)号：DE69943014D1
公开(公告)日：2011-01-20
申请号：DE69943014
申请日：1999-09-14
Applicant: LUCENT TECHNOLOGIES INC
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公开(公告)号：DE69939146D1
公开(公告)日：2008-09-04
申请号：DE69939146
申请日：1999-09-14
Applicant: LUCENT TECHNOLOGIES INC
Abstract: A device for changing the power levels of signals transmitted by an optical fiber, along with signal modulation and wavelength routing, comprises a length of optical fiber in which for a predetermined section of the length of the fiber, the fiber core is surrounded by a cladding having one or more variable refractive index (VRI) regions disposed therein in close proximity to the core. The VRI regions are fabricated with a material having an index of refraction higher than that of the cladding and may comprise a variable attenuator.
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公开(公告)号：DE69937182T2
公开(公告)日：2008-06-26
申请号：DE69937182
申请日：1999-11-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ESPINDOLA ROLANDO PATRICIO , STRASSER THOMAS ANDREW , WAGENER JEFFERSON LYNN , WYSOCKI PAUL FRANCIS
Abstract: In accordance with the invention, a temperature-dependent rare earth doped waveguide optical amplifier is compensated by a temperature-dependent loss filter. The filter characteristics are designed to be temperature-dependent filters so that the gain characteristic of the amplifier is compensated over a practical operating temperature range. In essence, the amplifier comprises a length of optical waveguide for transmitting optical signals, a rare earth doped amplifying region in the waveguide for amplifying the transmitted optical signals, a pumping source for optically pumping the amplifying region, and a temperature-dependent loss filter. A typical design compensates an EFDA to a variation of less than 1 dB over a temperature range of -40 DEG C to 85 DEG C and a spectral range of at least 20 nm.
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公开(公告)号：DE69938444T2
公开(公告)日：2009-07-09
申请号：DE69938444
申请日：1999-09-14
Applicant: LUCENT TECHNOLOGIES INC
Abstract: An optical fiber grating device (10) including a length of optical fiber having a predetermined fundamental mode effective guide index and a longitudinally tapered region for accessing a fundamental mode of light. The tapered region has a grating (24) with a predetermined light spectral shaping property that shapes the light spectrum of the fundamental mode. A coating (26) surrounds the tapered region (18) of the fiber for modifying the fundamental mode effective guide index of the fiber in order to change the spectral shaping property of the grating.
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