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公开(公告)号：JPH10339825A
公开(公告)日：1998-12-22
申请号：JP3326898
申请日：1998-02-16
Applicant: CORNING INC
Inventor： SCOBEY MICHAEL A , SPOCK DEREK E , GRASIS MICHAEL E , LAFRENIERE ROBERT W
Abstract: PROBLEM TO BE SOLVED: To obtain the device which has small polarization dependent loss in a light signal path and a small amount of an adhesive in the light signal path by allowing an optical port, a filter element and a reflecting element to cooperatively prescribed part of a multipoint zigzag optical path by passing through an optical gap. SOLUTION: The optical port, filter element and reflecting element cooperatively prescribe part of the multipoint zigzag optical path by passing through the optical gap. For example, the selective reflecting filter element of at least one of channel ports 18 and 42 is fixed to a reflecting element like an optical block 2 and a wide-band reflector extending to one optical gap of a parallel flank. A 2nd channel port and/or the selective reflecting filter element of the other reflecting element are fixed to an optical block 2 extending to the optical gap of the parallel flank on the opposite side. The multipoint zigzag optical path is established in an optical block 2 like this and extends to the front and rear through the gap between the two parallel flanks.
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公开(公告)号：CA2229302A1
公开(公告)日：1998-08-14
申请号：CA2229302
申请日：1998-02-12
Applicant: CORNING INC , OPTICAL CORP OF AMERICA
Inventor： SCOBEY MICHAEL A , SPOCK DEREK E , GRASIS MICHAEL E , LAFRENIERE ROBERT W
Abstract: An optical multiplexing device demultiplexes collimated light from a fiber-optic source into separate individual wavelength sub-ranges or channels, and/or multip lexes separate channels to a common fiber-optic waveguide or other destination. An opt ical block defines an optical gap between two parallel surfaces having an optical por t on a first such parallel surface for passing the multi-channel collimated light into the optical gap. A channel port and at least one other reflective element, e.g., multiple ch annel ports arrayed in spaced relation to each other, are secured to the optical block at the parallel surfaces, providing an unobstructed, epoxy-free multi-point light path within the optical gap. At each channel port an interference filter secured to the opti cal block spans the optical gap. Each filter transmits a wavelength sub-range of the multi -channel collimated light passed by the optical port, and reflects other wavelengths. Thus, a wavelength sub-range of the multi-channel light passed through the optic al gap to a first channel port, which is in-band of that first channel port, is transmi tted through that first channel port. Light not transmitted through that first channel port i s reflected back through the optical gap, e.g., to strike a second channel port, at which a second, different wavelength sub-range is transmitted. The reflected optical signal thus cascades in a "multiple-bounce" sequence through the optical gap of the multiple xing device, sequentially adding and/or removing channels.
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公开(公告)号：AU7316098A
公开(公告)日：1999-01-07
申请号：AU7316098
申请日：1998-06-25
Applicant: CORNING INC
Inventor： GRASIS MICHAEL E , SCOBEY MICHAEL A , SPOCK DEREK E
Abstract: An optical multiplexing device is provided comprising multiple wavelength division multiplexers cascaded together. A first one of the wavelength division multiplexers has a common port and multiple optical ports which are optically coupled to the common port. The common port may be optically coupled to a trunk line of a system employing wavelength division multiplexing, for example, a fiber-optic telecommunication system employing 4, 8, 16 or other number of multiplexed channels. The optical ports include multiple channel ports, each of which is transparent to a corresponding wavelength sub-range and reflective of other wavelengths. The second wavelength division multiplexer has a common port optically coupled to one of the optical ports of the first wavelength division multiplexer. The second wavelength division multiplexer also has multiple optical ports which are optically coupled to its common port and include multiple wavelength-selective channel ports. A waveguide, such as a fiber-optic line, can optically connect the common port of the second wavelength division multiplexer to an optical port of the first wavelength division multiplexer. The cascaded WDMs each may be optically coupled to the output of a passive coupler and a housing may be provided defining an enclosed space in which the optical multiplexing device is mounted. Optionally, additional WDMs may be cascaded with the first two WDMs in a parallel or branched formation, an in-line formation or some combination. Preferably, the channels are interleaved, such that they are removed from the multiplexed signal in certain non-sequential order. The optical multiplexing device also may employ compound interleaving wherein adjacent channels are multiplexed by different ones of the cascaded WDMs. The optical multiplexing devices can operate to add signals, remove signals or a combination of both.
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公开(公告)号：AU5388898A
公开(公告)日：1998-08-20
申请号：AU5388898
申请日：1998-02-12
Applicant: CORNING INC
Inventor： SCOBEY MICHAEL A , SPOCK DEREK E , GRASIS MICHAEL E , LAFRENIERE ROBERT W
Abstract: An optical multiplexing device demultiplexes collimated light from a fiber-optic source into separate individual wavelength sub-ranges or channels, and/or multiplexes separate channels to a common fiber-optic waveguide or other destination. An optical block (2) defines an optical gap (10) between two parallel surfaces (12,14) having an optical port (18) on a first such parallel surface for passing the multi-channel collimated light into the optical gap (10). A channel port (18) and at least one other reflective element (20), e.g., multiple channel ports arrayed in spaced relation to each other, are secured to the optical block at the parallel surfaces, providing an unobstructed, epoxy-free multi-point light path within the optical gap. At each channel port an interference filter (32) secured to the optical block (2) spans the optical gap (10). Each filter transmits a wavelength sub-range of the multi-channel collimated light passed by the optical port, and reflects other wavelengths. Thus, a wavelength sub-range of the multi-channel light passed through the optical gap (10) to a first channel port, which is in-band of that first channel port, is transmitted through that first channel port. Light not transmitted through that first channel port is reflected back through the optical gap, e.g., to strike a second channel port, at which a second, different wavelength sub-range is transmitted. The reflected optical signal thus cascades in a "multiple-bounce" sequence through the optical gap of the multiplexing device, sequentially adding and/or removing channels.
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Patent Agency Ranking
公开(公告)号：AU740262B2
公开(公告)日：2001-11-01
申请号：AU7316098
申请日：1998-06-25
Applicant: CORNING INC
Inventor： GRASIS MICHAEL E , SCOBEY MICHAEL A , SPOCK DEREK E
Abstract: An optical multiplexing device is provided comprising multiple wavelength division multiplexers cascaded together. A first one of the wavelength division multiplexers has a common port and multiple optical ports which are optically coupled to the common port. The common port may be optically coupled to a trunk line of a system employing wavelength division multiplexing, for example, a fiber-optic telecommunication system employing 4, 8, 16 or other number of multiplexed channels. The optical ports include multiple channel ports, each of which is transparent to a corresponding wavelength sub-range and reflective of other wavelengths. The second wavelength division multiplexer has a common port optically coupled to one of the optical ports of the first wavelength division multiplexer. The second wavelength division multiplexer also has multiple optical ports which are optically coupled to its common port and include multiple wavelength-selective channel ports. A waveguide, such as a fiber-optic line, can optically connect the common port of the second wavelength division multiplexer to an optical port of the first wavelength division multiplexer. The cascaded WDMs each may be optically coupled to the output of a passive coupler and a housing may be provided defining an enclosed space in which the optical multiplexing device is mounted. Optionally, additional WDMs may be cascaded with the first two WDMs in a parallel or branched formation, an in-line formation or some combination. Preferably, the channels are interleaved, such that they are removed from the multiplexed signal in certain non-sequential order. The optical multiplexing device also may employ compound interleaving wherein adjacent channels are multiplexed by different ones of the cascaded WDMs. The optical multiplexing devices can operate to add signals, remove signals or a combination of both.
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公开(公告)号：CA2310586A1
公开(公告)日：1999-07-15
申请号：CA2310586
申请日：1998-12-10
Applicant: CORNING INC
Inventor： LAFRENIERE ROBERT W , SPOCK DEREK E , GRASIS MICHAEL E , SCOBEY MICHAEL A
Abstract: An optical device has a filter assembly defining a light path, preferably a multi-bounce zigzag expanded beam light path, from a common port (36) at least to a first channel port (38) and then a second channel port (40) and then a pass-through port (32). The first channel port (38) has a first optical filter element (48), which is transparent to a wavelength sub-range within the wavelength range passed by the common port (36) and the pass-through port (32), and substantially reflective of other wavelengths within such wavelength range. The second channel port (40) includes a second optical filter element (60) having light transmittance and reflectance properties substantially the same as those of the first optical filter element (38). The optical multiplexing device can be used to extract or drop a selected wavelength subrange, most typically a single channel signal, from the multiplexed light, and to then inject a new signal into the multiplexed light at that same wavelength sub-range.
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公开(公告)号：AU719757B2
公开(公告)日：2000-05-18
申请号：AU5388898
申请日：1998-02-12
Applicant: CORNING INC
Inventor： SCOBEY MICHAEL A , SPOCK DEREK E , GRASIS MICHAEL E , LAFRENIERE ROBERT W
Abstract: An optical multiplexing device demultiplexes collimated light from a fiber-optic source into separate individual wavelength sub-ranges or channels, and/or multiplexes separate channels to a common fiber-optic waveguide or other destination. An optical block (2) defines an optical gap (10) between two parallel surfaces (12,14) having an optical port (18) on a first such parallel surface for passing the multi-channel collimated light into the optical gap (10). A channel port (18) and at least one other reflective element (20), e.g., multiple channel ports arrayed in spaced relation to each other, are secured to the optical block at the parallel surfaces, providing an unobstructed, epoxy-free multi-point light path within the optical gap. At each channel port an interference filter (32) secured to the optical block (2) spans the optical gap (10). Each filter transmits a wavelength sub-range of the multi-channel collimated light passed by the optical port, and reflects other wavelengths. Thus, a wavelength sub-range of the multi-channel light passed through the optical gap (10) to a first channel port, which is in-band of that first channel port, is transmitted through that first channel port. Light not transmitted through that first channel port is reflected back through the optical gap, e.g., to strike a second channel port, at which a second, different wavelength sub-range is transmitted. The reflected optical signal thus cascades in a "multiple-bounce" sequence through the optical gap of the multiplexing device, sequentially adding and/or removing channels.
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公开(公告)号：BR9800612A
公开(公告)日：1999-10-05
申请号：BR9800612
申请日：1998-02-13
Applicant: CORNING INC
Inventor： SCOBEY MICHAEL A , SPOCK DEREK E , GRASIS MICHAEL E , LAFRENIERE ROBERT W
Abstract: An optical multiplexing device demultiplexes collimated light from a fiber-optic source into separate individual wavelength sub-ranges or channels, and/or multiplexes separate channels to a common fiber-optic waveguide or other destination. An optical block (2) defines an optical gap (10) between two parallel surfaces (12,14) having an optical port (18) on a first such parallel surface for passing the multi-channel collimated light into the optical gap (10). A channel port (18) and at least one other reflective element (20), e.g., multiple channel ports arrayed in spaced relation to each other, are secured to the optical block at the parallel surfaces, providing an unobstructed, epoxy-free multi-point light path within the optical gap. At each channel port an interference filter (32) secured to the optical block (2) spans the optical gap (10). Each filter transmits a wavelength sub-range of the multi-channel collimated light passed by the optical port, and reflects other wavelengths. Thus, a wavelength sub-range of the multi-channel light passed through the optical gap (10) to a first channel port, which is in-band of that first channel port, is transmitted through that first channel port. Light not transmitted through that first channel port is reflected back through the optical gap, e.g., to strike a second channel port, at which a second, different wavelength sub-range is transmitted. The reflected optical signal thus cascades in a "multiple-bounce" sequence through the optical gap of the multiplexing device, sequentially adding and/or removing channels.
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公开(公告)号：ID19915A
公开(公告)日：1998-08-20
申请号：ID980194
申请日：1998-02-13
Applicant: CORNING INC
Inventor： SCOBEY MICHAEL A , SPOCK DEREK E , GRASIS MICHAEL E , LAFRENIERE ROBERT W
Abstract: An optical multiplexing device demultiplexes collimated light from a fiber-optic source into separate individual wavelength sub-ranges or channels, and/or multiplexes separate channels to a common fiber-optic waveguide or other destination. An optical block (2) defines an optical gap (10) between two parallel surfaces (12,14) having an optical port (18) on a first such parallel surface for passing the multi-channel collimated light into the optical gap (10). A channel port (18) and at least one other reflective element (20), e.g., multiple channel ports arrayed in spaced relation to each other, are secured to the optical block at the parallel surfaces, providing an unobstructed, epoxy-free multi-point light path within the optical gap. At each channel port an interference filter (32) secured to the optical block (2) spans the optical gap (10). Each filter transmits a wavelength sub-range of the multi-channel collimated light passed by the optical port, and reflects other wavelengths. Thus, a wavelength sub-range of the multi-channel light passed through the optical gap (10) to a first channel port, which is in-band of that first channel port, is transmitted through that first channel port. Light not transmitted through that first channel port is reflected back through the optical gap, e.g., to strike a second channel port, at which a second, different wavelength sub-range is transmitted. The reflected optical signal thus cascades in a "multiple-bounce" sequence through the optical gap of the multiplexing device, sequentially adding and/or removing channels.
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