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公开(公告)号：EP1240113A2
公开(公告)日：2002-09-18
申请号：EP00991848.3
申请日：2000-10-18
申请人： CORNING INCORPORATED
IPC分类号： C03B37/027
CPC分类号： G02B6/0229 , C03B32/02 , C03B37/01211 , C03B37/027 , C03B2201/10 , C03B2201/28 , C03B2201/31 , C03B2201/34 , C03B2201/40 , C03B2203/22 , C03B2205/56 , C03B2205/72 , C03C13/006 , C03C13/045 , C03C13/046 , C09K11/646 , C09K11/685
摘要： A method for making a glass ceramic, optoelectronic material such as a clad optical fiber or other component for use in an optoelectronic device. The method comprises preparing a glass composition batch to yield a precursor glass for a nanocrystalline glass-ceramic that is doped with at least one kind of optically active ion, such as a transition metal or lanthanide element; melting the batch; forming a glass cane; surrounding the cane with a chemically inert cladding material shaped in the form of a tube; drawing a glass fiber from the combined precursor-glass 'cane-in-tube' at a temperature slightly above the liquidus of the precursor glass composition, and heat treating at least a portion of the drawn clad glass fiber under conditions to develop nanocrystals within the core composition and thereby forming a glass ceramic.
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公开(公告)号：EP1232126A1
公开(公告)日：2002-08-21
申请号：EP00975244.5
申请日：2000-10-12
申请人： CORNING INCORPORATED
CPC分类号： G02B6/0229 , C03B32/02 , C03C4/0071 , C03C10/00 , C03C10/0009 , C03C10/0045 , C03C13/04 , C03C13/046 , C09K11/646 , C09K11/685 , H01S3/162 , H01S3/1623 , H01S3/163 , H01S3/1658 , H01S3/17
摘要： A gain medium for use in optical amplifiers or laser oscillators is disclosed. The gain medium includes a transition-metal doped glass-ceramic material having a crystal phase and a glass phase. The crystal phase is formed in situ in the glass phase, with the transition metal ions preferentially partitioning into the crystalline sites from the glass phase. The crystalline sites so formed have a size of less than 50 nm, and the transition metal ions within them are capable of lasing at a wavelength within the range of about 900 to 3000 nm. Also disclosed are amplifier and laser oscillator configurations, where the glass-ceramic gain medium is applied in a variety of configurations. Also disclosed is a method of amplifying a signal of light wherein the glass-ceramic gain medium is pumped with light energy so as to excite the transition metal ions, and the signal of light is transmitted through the gain medium while the transition metal ions are excited, whereby the signal of light is amplified. Also disclosed is a method of producing laser oscillation wherein the glass-ceramic gain medium is included in a laser cavity, pumped with optical energy to excite the transition metal ions, and the resulting radiation is forced to oscillate by the use of reflecting surfaces for feedback.
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公开(公告)号：EP1337495B1
公开(公告)日：2007-12-26
申请号：EP01973757.6
申请日：2001-09-19
申请人： Corning Incorporated
发明人： BEALL, Douglas, M. , BEALL, George
CPC分类号： C04B35/19 , C04B35/10 , C04B35/44 , C04B38/0006 , C04B2111/00793 , Y10S55/30 , C04B38/0054 , C04B38/0074
摘要： A ceramic article which consists essentially, by weight on the oxide basis, of 10-25 % SiO2, 65-85 % Al2O3, and 2-12 % Li2O and comprises beta-eucryptite as a first phase having a negative component in thermal expansion and a melting point Tm1, and a second phase having a positive component in thermal expansion which is higher than the component in thermal expansion of the first phase and a melting point Tm2, wherein Tm2 > Tm1, wherein the first phase is at most 50 % by weight of the ceramic, and wherein the ceramic is characterized by microcracking. Tm2 is at least 1800 °C. The ceramic article exhibits a near zero coefficient of thermal expansion from room temperature to 800 °C, a high refractoriness, and a high resistance to thermal shock properties which make the inventive ceramic extremely desirable in high temperature applications, such as filters for diesel exhaust engines.
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公开(公告)号：EP1337495A1
公开(公告)日：2003-08-27
申请号：EP01973757.6
申请日：2001-09-19
申请人： CORNING INCORPORATED
发明人： BEALL, Douglas, M. , BEALL, George
CPC分类号： C04B35/19 , C04B35/10 , C04B35/44 , C04B38/0006 , C04B2111/00793 , Y10S55/30 , C04B38/0054 , C04B38/0074
摘要： A ceramic article which consists essentially, by weight on the oxide basis, of 10-25 % SiO2, 65-85 % Al2O3, and 2-12 % Li2O and comprises beta-eucryptite as a first phase having a negative component in thermal expansion and a melting point Tm1, and a second phase having a positive component in thermal expansion which is higher than the component in thermal expansion of the first phase and a melting point Tm2, wherein Tm2 > Tm1, wherein the first phase is at most 50 % by weight of the ceramic, and wherein the ceramic is characterized by microcracking. Tm2 is at least 1800 °C. The ceramic article exhibits a near zero coefficient of thermal expansion from room temperature to 800 °C, a high refractoriness, and a high resistance to thermal shock properties which make the inventive ceramic extremely desirable in high temperature applications, such as filters for diesel exhaust engines.
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