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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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公开(公告)号：JP2000164955A
公开(公告)日：2000-06-16
申请号：JP33130199
申请日：1999-11-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ROLAND PATRICIO ESPINDRA , STRASSER THOMAS ANDREW , WAGENER JEFFERSON LYNN , WYSOCKI PAUL FRANCIS
Abstract: PROBLEM TO BE SOLVED: To obtain good temperature compensation in an optical amplifier of temperature-dependent rare-earth doped waveguide. SOLUTION: An optical amplifier 10 of temperature-dependent rare-earth doped waveguide (for example, EDFA erbium-doped fiber amplifier) is compensated by a temperature-dependent loss filter 14. The characteristics of the filter 14 as a temperature-dependent loss filter are designed such that gain characteristics are compensated in all active operation temperature range. The amplifier 10 includes an optical waveguide 11 for transmitting an optical signal, rare-earth doped amplifying regions 12A and 12B in the optical waveguide 11 for amplifying the transmitted optical signal, pumping sources 13a and 13B for carrying out the optical pumping of the amplifying regions 12A and 12B, and the temperature-dependent loss filter 14. In a typical design, EDFA is compensated to the fluctuation within 1 dB, at the temperature range from -40 to 85 deg.C in at least a spectral range of 20 nm. In an embodiment, the loss filter 14 includes a plurality of filters with the central wavelength shifts which differ according to the temperature.
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公开(公告)号：JPH11284268A
公开(公告)日：1999-10-15
申请号：JP3574299
申请日：1999-02-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DEMARCO JOHN JOSEPH , JUDKINS JUSTIN BOYD , WYSOCKI PAUL FRANCIS
Abstract: PROBLEM TO BE SOLVED: To provide a multi-wavelength light source which is efficient and inexpensive. SOLUTION: The multi-wavelength light source comprises an optical waveguide amplifier 11 of a certain length, a multi-wavelength reflector 15 which is optically connected to one end of the amplifier and reflects a plurality of different wavelengths, and a low reflection output 14 connected to the other end of the amplifier. A broad band source 12 is so provided as to send broad band light to the multi-wavelength reflector 15. In the action of the device, the broad band light is sent to the grating 15. The light of wavelength channel corresponding to the reflection wavelength of the grating is, through the amplifier 11, reflected and returned, and further amplified before reaching an output point 14.
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公开(公告)号：DE60001239D1
公开(公告)日：2003-02-27
申请号：DE60001239
申请日：2000-02-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ESPINDOLA ROLANDO PATRICIO , STRASSER THOMAS ANDREW , WESTBROOK PAUL STEPHEN , WYSOCKI PAUL FRANCIS
Abstract: L-band EDFA (Er-doped fiber amplifier) characteristics are improved by provision of filter means in the C-band, the filter means having a figure of merit greater than 400dB.nm. The filter means can be discrete and/or distributed filter means. In preferred embodiments, two or more full C-band blazed fiber Bragg gratings are used.
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公开(公告)号：DE69937182D1
公开(公告)日：2007-11-08
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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Patent Agency Ranking
公开(公告)号：DE60001239T2
公开(公告)日：2003-10-30
申请号：DE60001239
申请日：2000-02-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ESPINDOLA ROLANDO PATRICIO , STRASSER THOMAS ANDREW , WESTBROOK PAUL STEPHEN , WYSOCKI PAUL FRANCIS
Abstract: L-band EDFA (Er-doped fiber amplifier) characteristics are improved by provision of filter means in the C-band, the filter means having a figure of merit greater than 400dB.nm. The filter means can be discrete and/or distributed filter means. In preferred embodiments, two or more full C-band blazed fiber Bragg gratings are used.
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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：DE69705580T2
公开(公告)日：2002-06-06
申请号：DE69705580
申请日：1997-04-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DIGIOVANNI DAVID JOHN , WOMACK KIM WILLARD , PARK NAMKYOO , WYSOCKI PAUL FRANCIS
Abstract: Multistage Er-doped fiber amplifiers (EDFAs) (60) are disclosed. They comprise a first stage (63) that comprises Er and Al, and further comprise a second stage (67) that comprises Er and a further rare earth element, exemplary Yb. Such multistage EDFAs can have advantageous characteristics e.g., a relatively wide flat gain region (e.g. 1544-1562 nm), and relatively high output power, without significant degradation of the noise figure. Exemplary, the amplifiers are used in WDM systems and in analog CATV systems (110).
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公开(公告)号：DE69705580D1
公开(公告)日：2001-08-16
申请号：DE69705580
申请日：1997-04-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DIGIOVANNI DAVID JOHN , WOMACK KIM WILLARD , PARK NAMKYOO , WYSOCKI PAUL FRANCIS
Abstract: Multistage Er-doped fiber amplifiers (EDFAs) (60) are disclosed. They comprise a first stage (63) that comprises Er and Al, and further comprise a second stage (67) that comprises Er and a further rare earth element, exemplary Yb. Such multistage EDFAs can have advantageous characteristics e.g., a relatively wide flat gain region (e.g. 1544-1562 nm), and relatively high output power, without significant degradation of the noise figure. Exemplary, the amplifiers are used in WDM systems and in analog CATV systems (110).
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公开(公告)号：EP0803944A3
公开(公告)日：1998-09-02
申请号：EP97302411
申请日：1997-04-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DIGIOVANNI DAVID JOHN , WOMACK KIM WILLARD , PARK NAMKYOO , WYSOCKI PAUL FRANCIS
CPC classification number: H01S3/06758 , H01S3/1608 , H01S3/1618 , H01S2301/04
Abstract: Multistage Er-doped fiber amplifiers (EDFAs) (60) are disclosed. They comprise a first stage (63) that comprises Er and Al, and further comprise a second stage (67) that comprises Er and a further rare earth element, exemplary Yb. Such multistage EDFAs can have advantageous characteristics e.g., a relatively wide flat gain region (e.g. 1544-1562 nm), and relatively high output power, without significant degradation of the noise figure. Exemplary, the amplifiers are used in WDM systems and in analog CATV systems (110).
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