公开(公告)号：JP2003195097A

公开(公告)日：2003-07-09

申请号：JP2002251661

申请日：2002-08-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAI YONGMING ,  KOEPPEN CHRISTOPHER ,  WIELANDY STEPHAN F

IPC: G02B6/122 ,  G01J3/18 ,  G01J3/36 ,  G02B5/18 ,  G02B6/00 ,  G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H04B10/02 ,  H04B10/08 ,  H04J14/00 ,  H04J14/02

Abstract: PROBLEM TO BE SOLVED: To provide an optical waveguide tap which is inexpensive while enabling provision of an increased band width and/or resolution for optical applications which will newly appear. SOLUTION: An optical monitoring arrangement utilizes the properties of a blazed Bragg grating to redirect a portion of an optical signal out of the axial path and into a detecting device. A plurality of blazed Bragg gratings are utilized each of which has unique properties to increase the robustness of the monitor. In particular, the bandwidth of the monitor may be increased N-fold by utilizing a plurality of N gratings (assuming no overlap in wavelength between gratings). Alternatively, an improvement in resolution can be obtained by utilizing a narrower bandwidth and measuring N times the number of raw data points within that band width. A combination of increase in bandwidth and resolution may be obtained by a compromise between these two extremes. Chirped blazed gratings may also be employed. COPYRIGHT: (C)2003,JPO

公开(公告)号：CA2399514A1

公开(公告)日：2003-03-06

申请号：CA2399514

申请日：2002-08-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAI YONGMING ,  KOEPPEN CHRISTOPHER STEPHEN ,  WIELANDY STEPHAN F

IPC: G02B6/122 ,  G01J3/18 ,  G01J3/36 ,  G02B5/18 ,  G02B6/00 ,  G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H04B10/02 ,  H04B10/08 ,  H04J14/00 ,  H04J14/02 ,  H04B10/12

Abstract: An optical monitoring arrangement utilizes the properties of a blazed Bragg grating to redirect a portion of an optical signal out of the axial path and into a detecting device. A plurality of blazed Bragg gratings are utilized, each having unique properties, to increa se the robustness of the monitor. In particular, by utilizing a plurality of N gratings, the bandwidt h of the monitor may be increased N-fold (assuming no overlap in wavelength between gratings). Alternatively, an improvement in resolution can be obtained by utilizing a narrower bandwidth and measuring N times the number of raw data points within that bandwidth. A combination of increa se in bandwidth and resolution may be obtained by a comprise between these two extremes. Chirped blazed gratings may also be employed.