-
Patent Agency Ranking
公开(公告)号：WO9636858A2
公开(公告)日：1996-11-21
申请号：PCT/US9606712
申请日：1996-05-09
Applicant: TRACOR
Inventor： NICHOLSON JAMES E
CPC classification number: G01J9/0246 , G01J2009/0226
Abstract: An incident optical signal is captured by an array of apertures and directed to pairs of fibers, each pair having a delay fiber with a unique length and a no-delay fiber. Each pair of fibers further has a unique transmission characteristic. Time interpolation is then performed using the transmission characteristic curve for each delay fiber and the duration from the time the optical signal arrives over the no-delay fibers and the time the signal arrives over the delay fibers to determine the wavelength. In a second embodiment, each pair of delay and no-delay fibers is replaced by a fiber splitter which directs light into a no-delay fiber and a delay fiber that have been split from the input of the splitter. In a third embodiment, two fiber splitters are used in place of the pairs of fibers. Each splitter has a number of branches for receiving light and an output end for guiding light onto the photodetectors. The propagation time of the delay optical signal, as compared against the no-delay signal, and other factors such as the length of the individual fiber and the transmission characteristics, are used to determine the wavelength.
Abstract translation: 入射光信号由一组孔径捕获并被引导到一对光纤，每对光纤具有一个具有唯一长度的延迟光纤和一个无延迟光纤。 每对纤维还具有独特的传输特性。 然后使用每个延迟光纤的传输特性曲线和从光信号到达无延迟光纤时的持续时间和信号到达延迟光纤的时间来确定波长来执行时间插值。 在第二实施例中，每对延迟和无延迟光纤由光纤分离器代替，光纤分离器将光引导到已经从分离器的输入分离的无延迟光纤和延迟光纤。 在第三实施例中，使用两根光纤分离器代替成对的光纤。 每个分离器具有用于接收光的多个分支和用于将光引导到光电检测器上的输出端。 使用与无延迟信号相比的延迟光信号的传播时间以及诸如单个光纤的长度和传输特性的其它因素来确定波长。
-
公开(公告)号：CA2221176A1
公开(公告)日：1996-11-21
申请号：CA2221176
申请日：1996-05-09
Applicant: TRACOR
Inventor： NICHOLSON JAMES E
Abstract: An incident optical signal is captured by an array of apertures and directed to pairs of fibers, each pair having a delay fiber with a unique length and a no-delay fiber. Each pair of fibers further has a unique transmission characteristic. Time interpolation is then performed using the transmission characteristic curve for each delay fiber and the duration from the time the optical signal arrives over the no-delay fibers and the time the signal arrives over the delay fibers to determine the wavelength. In a second embodiment, each pair of delay and no-delay fibers is replaced by a fiber splitter which directs light into a no-delay fiber and a delay fiber that have been split from the input of the splitter. In a third embodiment, two fiber splitters are used in place of the pairs of fibers. Each splitter has a number of branches for receiving light and an output end for guiding light onto the photodetectors. The propagation time of the delay optical signal, as compared against the no-delay signal, and other factors such as the length of the individual fiber and the transmission characteristics, are used to determine the wavelength.
-
公开(公告)号：AU6761096A
公开(公告)日：1996-11-29
申请号：AU6761096
申请日：1996-05-09
Applicant: TRACOR
Inventor： NICHOLSON JAMES E
Abstract: An incident optical signal is captured by an array of apertures and directed to pairs of fibers, each pair having a delay fiber with a unique length and a no-delay fiber. Each pair of fibers further has a unique transmission characteristic. Time interpolation is then performed using the transmission characteristic curve for each delay fiber and the duration from the time the optical signal arrives over the no-delay fibers and the time the signal arrives over the delay fibers to determine the wavelength. In a second embodiment, each pair of delay and no-delay fibers is replaced by a fiber splitter which directs light into a no-delay fiber and a delay fiber that have been split from the input of the splitter. In a third embodiment, two fiber splitters are used in place of the pairs of fibers. Each splitter has a number of branches for receiving light and an output end for guiding light onto the photodetectors. The propagation time of the delay optical signal, as compared against the no-delay signal, and other factors such as the length of the individual fiber and the transmission characteristics, are used to determine the wavelength.
-
公开(公告)号：CA2125046A1
公开(公告)日：1993-06-10
申请号：CA2125046
申请日：1992-12-04
Applicant: TRACOR AEROSPACE INC
Inventor： NICHOLSON JAMES E , PARKER JACK H , MATHUR JAGDISH P , HULL DAVID M
Abstract: 2125046 9311444 PCTABScor01 An incident optical signal from a potential enemy threat is captured by an array of apertures (1, 16) which are connected to a number of broadband filters (21-24). The broadband filters (21-24) have overlapping band pass regions to cover the wavelength spectrum of potential threats, but not with the spectral resolution of a larger number of narrowband filters. To further increase resolution without adding additional filters, each broadband filter is connected to an optical delay line (31-34) which converts wavelength into a time delay. To enable measurement of the time delay, additional optical lines (91-94) with no relative delay are connected directly from the apertures (1-16). The time difference between when a signal arrives over optical delay lines (31-34) from the filters and when a signal arrives over optical lines (91-94) directly from the array of apertures (1, 16) is then reconverted to wavelength to a high degree of resolution.
-
公开(公告)号：CA2221176C
公开(公告)日：2003-11-04
申请号：CA2221176
申请日：1996-05-09
Applicant: TRACOR
Inventor： NICHOLSON JAMES E
Abstract: An incident optical signal is captured by an array of apertures and directed to pairs of fibers, each pair having a delay fiber with a unique length and a no-delay fiber. Each pair of fibers further has a unique transmission characteristic. Time interpolation is then performed using the transmission characteristic curve for each delay fiber and the duration from the time the optical signal arrives over the no-delay fibers and the time the signal arrives over the delay fibers to determine the wavelength. In a second embodiment, each pair of delay and no-delay fibers is replaced by a fiber splitter which directs light into a no-delay fiber and a delay fiber that have been split from the input of the splitter. In a third embodiment, two fiber splitters are used in place of the pairs of fibers. Each splitter has a number of branches for receiving light and an output end for guiding light onto the photodetectors. The propagation time of the delay optical signal, as compared against the no-delay signal, and other factors such as the length of the individual fiber and the transmission characteristics, are used to determine the wavelength.
-
-
-
-
Search Results
5
records
(took 0.018 seconds)
