公开(公告)号：GB2378607B

公开(公告)日：2005-05-04

申请号：GB0215667

申请日：2002-07-05

Applicant: PGS AMERICAS INC

Inventor： MAAS STEVEN J ,  METZBOWER D RICHARD

IPC: G01H9/00 ,  H04R1/44

Abstract: There is provided a fiber-optic hydrophone having a compliant sensing mandrel coaxial with and adjacent to a rigid reference mandrel. A first optical fiber is wound around the compliant sensing mandrel and a second optical fiber is wound around the reference mandrel. The first and second optical fibers comprise different arms of an interferometer. Flexible sealing members, such as O-rings, seal the compliant sensing mandrel to the hydrophone. One O-ring is disposed near each end of the sensing mandrel. A cylindrical support member is disposed inside the sensing mandrel. At least a portion of the support member is spaced from the sensing mandrel so as to provide a sealed cavity between the sensing mandrel and the support member. The sealed cavity is filled with air or similar compliant substance.

公开(公告)号：GB2391124A

公开(公告)日：2004-01-28

申请号：GB0314714

申请日：2003-06-24

Applicant: PGS AMERICAS INC

Inventor： MAAS STEVEN J ,  METZBOWER D RICHARD ,  MCMILLAN IAN

IPC: G01V1/22 ,  H04B10/12 ,  H04B10/08

Abstract: A cable for carrying optical signals to/from seismic sensors comprising one or more strength members and a plurality of optical fibres in a plurality of tubes. The fibres include at least one input bus fibre 2, one return bus fibre 4, input distribution fibres 24, connected from the input bus 2 to seismic sensors 8, and return fibres 28, connected from sensors 8 to the return bus 4. The system may also include optical amplifiers 18, pumped via pump fibres 6. The system may also include wavelength division and/or frequency division multiplexing. The system may be modular, including connection modules 10 and 14, which connect to/from the fibre buses 2 and 4, and demultiplex, re-multiplex and amplify the signals.

公开(公告)号：NO20023214L

公开(公告)日：2003-01-13

申请号：NO20023214

申请日：2002-07-02

Applicant: PGS AMERICAS INC

Inventor： MAAS STEVEN J ,  METZBOWER D RICHARD

IPC: G01H9/00 ,  H04R1/44

Abstract: There is provided a fiber-optic hydrophone having a compliant sensing mandrel coaxial with and adjacent to a rigid reference mandrel. A first optical fiber is wound around the compliant sensing mandrel and a second optical fiber is wound around the reference mandrel. The first and second optical fibers comprise different arms of an interferometer. Flexible sealing members, such as O-rings, seal the compliant sensing mandrel to the hydrophone. One O-ring is disposed near each end of the sensing mandrel. A cylindrical support member is disposed inside the sensing mandrel. At least a portion of the support member is spaced from the sensing mandrel so as to provide a sealed cavity between the sensing mandrel and the support member. The sealed cavity is filled with air or similar compliant substance.