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公开(公告)号：JPH1056227A
公开(公告)日：1998-02-24
申请号：JP14678897
申请日：1997-06-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DIGIOVANNI DAVID JOHN , GRUBB STEPHEN GREGORY , INNISS DARYL , JAMESON RALPH STEPHEN , WALKER KENNETH LEE
Abstract: PROBLEM TO BE SOLVED: To provide a fiber laser hindering laser oscillation at an undesired wavelength. SOLUTION: An multi-mode fiber 51 in the fiber laser 40 is placed between a diode laser 49 used to activate an active medium of the fiber laser 40 and the fiber laser 40 used for an optical source. The multi-mode fiber part 51 reduces dramatically the intensity of the fiber laser beam made incident onto the diode laser 49 thereby increasing the reliability of the fiber laser 40. Furthermore, the multi-mode fiber part 51 reduces considerably an undesired wavelength so that the laser oscillation of the fiber laser 40 reaches its threshold value. When the fiber laser 40 is used for a source of a pump light in an FAMP, an adverse effect of multi-path interference MPI can be reduced.
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Patent Agency Ranking
公开(公告)号：JP2001066650A
公开(公告)日：2001-03-16
申请号：JP2000230391
申请日：2000-07-31
Applicant: LUCENT TECHNOLOGIES INC
Abstract: PROBLEM TO BE SOLVED: To realize an article having a fiber Raman device that is pumped by light from seven or more pump LEDs (for example from fourteen pump LEDs). SOLUTION: The Raman device 10 is equipped with a silica type optical fiber 12 comprising at least a first and a second wavelength selective elements 13, 141 arranged to provide one or more light cavities to Raman shift light in the optical fiber 12, a first coupler to couple pumped light having a first wavelength λ1 from a first pump light source 11 with the optical fiber 12, a means to provide an outgoing light utilizing means with Raman shifted Raman device outgoing light having a wavelength λ0 higher than λ1 and a second coupler 21 to couple pumped light having a second wavelength λ2 from a second pump light source 111 with the optical fiber 12. Then λ2 is different from λ1 and λ0>λ2 is satisfied, and at least one out of the wavelength selective elements is off resonance with respect to at least one out of λ1 and λ2.
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公开(公告)号：DE60024002T2
公开(公告)日：2006-07-13
申请号：DE60024002
申请日：2000-07-24
Applicant: LUCENT TECHNOLOGIES INC
Abstract: The disclosed fiber Raman device (10) comprises means for coupling pump radiation of a first wavelength lambda 1 and a second wavelength lambda 2 into a length of silica-based fiber (12), with lambda 1 being different from lambda 2, and with both of lambda 1 and lambda 2 being less than an output radiation lambda 0 of the fiber Raman device (10). The Raman device (10) further comprises at least a first and a second wavelength-selective element (13,141) disposed to provide one or more optical cavities for Raman shifting of light in the fiber. At least one of the optical cavities is selected such that at least one of lambda 1 and lambda 2 is off resonance. Exemplarily, the Raman device (10) is a topologically linear or circular Raman laser or amplifier, and the wavelength selective element is a fiber Bragg grating or a WDM. The Raman device is advantageously used in an optical fiber communication system.
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公开(公告)号：DE60024002D1
公开(公告)日：2005-12-22
申请号：DE60024002
申请日：2000-07-24
Applicant: LUCENT TECHNOLOGIES INC
Abstract: The disclosed fiber Raman device (10) comprises means for coupling pump radiation of a first wavelength lambda 1 and a second wavelength lambda 2 into a length of silica-based fiber (12), with lambda 1 being different from lambda 2, and with both of lambda 1 and lambda 2 being less than an output radiation lambda 0 of the fiber Raman device (10). The Raman device (10) further comprises at least a first and a second wavelength-selective element (13,141) disposed to provide one or more optical cavities for Raman shifting of light in the fiber. At least one of the optical cavities is selected such that at least one of lambda 1 and lambda 2 is off resonance. Exemplarily, the Raman device (10) is a topologically linear or circular Raman laser or amplifier, and the wavelength selective element is a fiber Bragg grating or a WDM. The Raman device is advantageously used in an optical fiber communication system.
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公开(公告)号：DE69717724D1
公开(公告)日：2003-01-23
申请号：DE69717724
申请日：1997-05-27
Applicant: LUCENT TECHNOLOGIES INC
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公开(公告)号：DE69717724T2
公开(公告)日：2003-10-09
申请号：DE69717724
申请日：1997-05-27
Applicant: LUCENT TECHNOLOGIES INC
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