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

IPC: G02B6/293 ,  G02B6/34

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.

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

IPC: G02B6/293 ,  G02B6/34 ,  H04J14/02

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.

公开(公告)号：BR9813239A

公开(公告)日：2000-10-10

申请号：BR9813239

申请日：1998-12-10

Applicant: CORNING INC

Inventor： GRASIS MICHAEL EDWARD ,  SCOBEY MICHAEL A ,  SPOCK DEREK E ,  LAFRENIERE ROBERT W

IPC: G02B6/293 ,  G02B6/34 ,  H04J14/02 ,  G02B6/28

Abstract: An optical multiplexing device is disclosed for multiplexing optical signals, for example, for a fiber-optic telecommunication system employing wavelength division multiplexing. The optical multiplexing device has a filter assembly defining a light path, preferably a multi-bounce zigzag expanded beam light path, from a common port at least to a first channel port and then a second channel port and then a pass-through port. The first channel port has a first optical filter element, for example, a multi-cavity interference filter, which is transparent to a wavelength sub-range within the wavelength range passed by the common port and the pass-through port, and substantially reflective of other wavelengths within such wavelength range. The second channel port includes a second optical filter element having light transmittance and reflectance properties substantially the same as those of the first optical filter element. The optical multiplexing device can be used to extract or drop a selected wavelength sub-range, 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. In accordance with preferred embodiments, the optical multiplexing device serves as an add/drop filter arrangement to extract the signal of a particular channel and then immediately use the available channel by injecting a new signal at that same wavelength sub-range.

公开(公告)号：WO0161871A3

公开(公告)日：2002-04-04

申请号：PCT/US0105163

申请日：2001-02-16

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  HALLOCK ROBERT ,  HARRIS JAMES M ,  MURPHY EDWARD F ,  SPOCK DEREK E

IPC: H04B10/02 ,  H04J14/00 ,  H04J14/02

CPC classification number: H04J14/0213 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0216 ,  H04J14/0221

Abstract: Methods and apparatus for combining, adding, and/or dropping channels in optical communication systems that utilize thin film filters without the creation of deadbands, using fiber Bragg gratings (316,322) and additional thin film optical filters, are described. According to one aspect of the invention, an optical filter (318) is used to drop a wavelength (328) range from an optical signal (312). Prior to the optical signal entering the optical filter, one or more fiber Bragg gratings and an optical circulator (310, 324) are used reflects a portion of the communications spectrum which would normally lie with the deadband region of the optical filter. According to another aspect of the present invention, an optical filter (320) is used to combine a first optical signal and a second optical signal to form a combined optical signal. Neither the first optical signal nor the second optical signal includes channels within a deadband region of the optical filter. One or more fiber Bragg gratings and an optical circulator or a coupler are used to add a third optical signal to the combined optical signal. The third optical signal includes signal wavelengths within the deadband region of the optical filter.

Abstract translation: 描述了使用光纤布拉格光栅（316,322）和附加的薄膜光学滤波器来组合，添加和/或丢弃利用薄膜滤波器而不产生死区的光通信系统中的信道的方法和装置。 根据本发明的一个方面，光滤波器（318）用于从光信号（312）中降低波长（328）范围。 在光信号进入光滤波器之前，使用一个或多个光纤布拉格光栅和光环行器（310,324）来反映通常与光滤波器的死区区域正常相关的通信频谱的一部分。 根据本发明的另一方面，光滤波器（320）用于组合第一光信号和第二光信号以形成组合光信号。 第一光信号和第二光信号都不包括在滤光器的死区内的通道。 使用一个或多个光纤布拉格光栅和光环行器或耦合器将第三光信号加到组合光信号上。 第三光信号包括在滤光器的死区内的信号波长。

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

IPC: G02B6/293 ,  G02B6/34 ,  G02B27/10 ,  H04J14/02

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.

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

IPC: G02B6/293 ,  G02B6/34 ,  H04J14/02

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.

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

IPC: G02B6/293 ,  G02B6/34 ,  G02B5/00 ,  H04J4/00

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.

公开(公告)号：CA2400054A1

公开(公告)日：2001-08-23

申请号：CA2400054

申请日：2001-02-16

Applicant: CORNING INC

Inventor： MURPHY EDWARD F ,  BHATIA VIKRAM ,  HALLOCK ROBERT ,  HARRIS JAMES M ,  SPOCK DEREK E

IPC: H04B10/60 ,  H04B10/071 ,  H04B10/25 ,  H04B10/291 ,  H04B10/40 ,  H04B10/50 ,  H04J14/00 ,  H04J14/02

Abstract: Methods and apparatus for combining, adding, and/or dropping channels in optical communication systems that utilize thin film filters without the creation of deadbands, using fiber Bragg gratings (316,322) and additional thin film optical filters, are described. According to one aspect of the invention, an optical filter (318) is used to drop a wavelength (328) range from an optical signal (312). Prior to the optical signal entering the optic al filter, one or more fiber Bragg gratings and an optical circulator (310, 324 ) are used reflects a portion of the communications spectrum which would normally lie with the deadband region of the optical filter. According to another aspect of the present invention, an optical filter (320) is used to combine a first optical signal and a second optical signal to form a combine d optical signal. Neither the first optical signal nor the second optical sign al includes channels within a deadband region of the optical filter. One or mor e fiber Bragg gratings and an optical circulator or a coupler are used to add a third optical signal to the combined optical signal. The third optical signa l includes signal wavelengths within the deadband region of the optical filter .

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

IPC: H04J14/00 ,  G02B6/293 ,  G02B6/34 ,  H04J14/02

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.

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

IPC: G02B6/293 ,  G02B6/34 ,  G02B27/10 ,  H04J14/02

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.