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公开(公告)号：AU626964B2
公开(公告)日：1992-08-13
申请号：AU4778690
申请日：1990-01-08
Applicant: IBM
Inventor： HARDER CHRISTOPH STEPHAN , RISK WILLIAM PAUL , MEIER HEINZ PETER , LENTH WILFRIED
IPC: G02F1/35 , G02F1/355 , G02F1/361 , G02F1/37 , H01S3/109 , H01S5/00 , H01S5/0687 , H01S5/40 , H01S3/30
Abstract: Apparatus and method for producing coherent blue-green-light radiation having a wavelength of essentially 490-500 nm. A diode laser (10), such as a strained-layer InGaAs/GaAs diode laser, provides a 980-1,000 nm beam (12), and a nonlinear crystal (19) of KTP (KTiOPO4) produces coherent radiation (22) by noncritically phase-matched second-harmonic generation (SHG) of said beam. The beam preferably has a wavelength of essentially 994 nm for generating radiation having a wavelength of essentially 497 nm. The crystal is disposed within an optical resonator (18) and the frequency of the laser is locked to that of the resonator. Alternatively, two diode lasers (10,11) are oriented to provide orthogonally polarized beams each with a wavelength of 980-1,000 nm but within essentially 1 nm of each other, and the KTP crystal is oriented with its a and c axes parallel to the orthogonally polarized beams. The KTP crystal may have an associated optical waveguide along which the beam is propagated to enhance SHG efficiency.
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公开(公告)号：DE68925810T2
公开(公告)日：1996-09-26
申请号：DE68925810
申请日：1989-12-18
Applicant: IBM
Inventor： HARDER CHRISTOPH STEPHAN , LENTH WILFRIED , MEIER HEINZ PETER , RISK WILLIAM PAUL
IPC: G02F1/35 , G02F1/355 , G02F1/361 , G02F1/37 , H01S3/109 , H01S5/00 , H01S5/0687 , H01S5/40 , H01S3/133
Abstract: Apparatus and method for producing coherent blue-green-light radiation having a wavelength of essentially 490-500 nm. A diode laser (10), such as a strained-layer InGaAs/GaAs diode laser, provides a 980-1,000 nm beam (12), and a nonlinear crystal (19) of KTP (KTiOPO4) produces coherent radiation (22) by noncritically phase-matched second-harmonic generation (SHG) of said beam. The beam preferably has a wavelength of essentially 994 nm for generating radiation having a wavelength of essentially 497 nm. The crystal is disposed within an optical resonator (18) and the frequency of the laser is locked to that of the resonator. Alternatively, two diode lasers (10,11) are oriented to provide orthogonally polarized beams each with a wavelength of 980-1,000 nm but within essentially 1 nm of each other, and the KTP crystal is oriented with its a and c axes parallel to the orthogonally polarized beams. The KTP crystal may have an associated optical waveguide along which the beam is propagated to enhance SHG efficiency.
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公开(公告)号：DE69109219D1
公开(公告)日：1995-06-01
申请号：DE69109219
申请日：1991-09-05
Applicant: IBM
Inventor： RISK WILLIAM PAUL
Abstract: A first section of a waveguide channel 20 is made of a nonlinear crystal material. A second section of the waveguide has a plurality of diverging channels 22. Each of the diverging channels is of a width which supports one of the modes of second harmonic generated light from the first section. First order mode second harmonic light is obtained at the end of one of the diverging channels.
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公开(公告)号：IN178818B
公开(公告)日：1997-06-28
申请号：IN152DE1990
申请日：1990-02-21
Applicant: IBM
Inventor： HARDER CHRISTOPH STEPHAN , LENTH WIDFRIED , MEIER HEINZ PETER , RISK WILLIAM PAUL
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公开(公告)号：DE69104808T2
公开(公告)日：1995-04-27
申请号：DE69104808
申请日：1991-11-04
Applicant: IBM
Inventor： LENTH WILFRIED , RISK WILLIAM PAUL
IPC: G02F1/37 , G11B7/125 , G11B7/135 , H01S3/082 , H01S5/06 , H01S5/065 , H01S5/0687 , H01S5/14 , H01S3/109 , H01S3/085 , G11B7/00
Abstract: A laser diode with a low reflectivity output facet provides infrared light to a nonlinear crystal resonator such that a portion of the infrared light is converted to blue light. A mirror is located on the opposite side of the nonlinear crystal resonator from the laser. The mirror allows the blue light to pass, but reflects the infrared light exiting the resonator back through the resonator and into the laser diode. The laser diode is thereby locked at the resonance frequency of the nonlinear crystal resonator.
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Patent Agency Ranking
公开(公告)号：HK203896A
公开(公告)日：1996-11-15
申请号：HK203896
申请日：1996-11-07
Applicant: IBM
Inventor： HARDER CHRISTOPH STEPHAN , LENTH WILFRIED , MEIER HEINZ PETER , RISK WILLIAM PAUL
IPC: G02F1/35 , G02F1/355 , G02F1/361 , G02F1/37 , H01S3/109 , H01S5/00 , H01S5/0687 , H01S5/40 , H01S3/133
Abstract: Apparatus and method for producing coherent blue-green-light radiation having a wavelength of essentially 490-500 nm. A diode laser (10), such as a strained-layer InGaAs/GaAs diode laser, provides a 980-1,000 nm beam (12), and a nonlinear crystal (19) of KTP (KTiOPO4) produces coherent radiation (22) by noncritically phase-matched second-harmonic generation (SHG) of said beam. The beam preferably has a wavelength of essentially 994 nm for generating radiation having a wavelength of essentially 497 nm. The crystal is disposed within an optical resonator (18) and the frequency of the laser is locked to that of the resonator. Alternatively, two diode lasers (10,11) are oriented to provide orthogonally polarized beams each with a wavelength of 980-1,000 nm but within essentially 1 nm of each other, and the KTP crystal is oriented with its a and c axes parallel to the orthogonally polarized beams. The KTP crystal may have an associated optical waveguide along which the beam is propagated to enhance SHG efficiency.
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公开(公告)号：DE69109219T2
公开(公告)日：1995-11-02
申请号：DE69109219
申请日：1991-09-05
Applicant: IBM
Inventor： RISK WILLIAM PAUL
Abstract: A first section of a waveguide channel 20 is made of a nonlinear crystal material. A second section of the waveguide has a plurality of diverging channels 22. Each of the diverging channels is of a width which supports one of the modes of second harmonic generated light from the first section. First order mode second harmonic light is obtained at the end of one of the diverging channels.
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公开(公告)号：CA2050159C
公开(公告)日：1995-08-08
申请号：CA2050159
申请日：1991-08-28
Applicant: IBM
Inventor： RISK WILLIAM PAUL
Abstract: A first section of a waveguide channel is made of a nonlinear crystal material. A second section of the waveguide has a plurality of diverging channels. Each of the diverging channels is of a width which supports one of the modes of second harmonic generated light from the first section. First order mode second harmonic light is obtained at the end of one of the diverging channels.
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公开(公告)号：DE68925810D1
公开(公告)日：1996-04-04
申请号：DE68925810
申请日：1989-12-18
Applicant: IBM
Inventor： HARDER CHRISTOPH STEPHAN , LENTH WILFRIED , MEIER HEINZ PETER , RISK WILLIAM PAUL
IPC: G02F1/35 , G02F1/355 , G02F1/361 , G02F1/37 , H01S3/109 , H01S5/00 , H01S5/0687 , H01S5/40 , H01S3/133
Abstract: Apparatus and method for producing coherent blue-green-light radiation having a wavelength of essentially 490-500 nm. A diode laser (10), such as a strained-layer InGaAs/GaAs diode laser, provides a 980-1,000 nm beam (12), and a nonlinear crystal (19) of KTP (KTiOPO4) produces coherent radiation (22) by noncritically phase-matched second-harmonic generation (SHG) of said beam. The beam preferably has a wavelength of essentially 994 nm for generating radiation having a wavelength of essentially 497 nm. The crystal is disposed within an optical resonator (18) and the frequency of the laser is locked to that of the resonator. Alternatively, two diode lasers (10,11) are oriented to provide orthogonally polarized beams each with a wavelength of 980-1,000 nm but within essentially 1 nm of each other, and the KTP crystal is oriented with its a and c axes parallel to the orthogonally polarized beams. The KTP crystal may have an associated optical waveguide along which the beam is propagated to enhance SHG efficiency.
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公开(公告)号：DE69104808D1
公开(公告)日：1994-12-01
申请号：DE69104808
申请日：1991-11-04
Applicant: IBM
Inventor： LENTH WILFRIED , RISK WILLIAM PAUL
IPC: G02F1/37 , G11B7/125 , G11B7/135 , H01S3/082 , H01S5/06 , H01S5/065 , H01S5/0687 , H01S5/14 , H01S3/109 , H01S3/085 , G11B7/00
Abstract: A laser diode with a low reflectivity output facet provides infrared light to a nonlinear crystal resonator such that a portion of the infrared light is converted to blue light. A mirror is located on the opposite side of the nonlinear crystal resonator from the laser. The mirror allows the blue light to pass, but reflects the infrared light exiting the resonator back through the resonator and into the laser diode. The laser diode is thereby locked at the resonance frequency of the nonlinear crystal resonator.
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