公开(公告)号：US3389337A

公开(公告)日：1968-06-18

申请号：US47575865

申请日：1965-07-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： HUBBARD WILLIAM M ,  WARTERS WILLIAM D

IPC: H04L25/24

CPC classification number: H04L25/242

公开(公告)号：US3569996A

公开(公告)日：1971-03-09

申请号：US3569996D

申请日：1968-06-07

Applicant: BELL TELEPHONE LABOR INC

Inventor： GOELL JAMES E ,  HUBBARD WILLIAM M

IPC: G02F2/00 ,  H04B10/148 ,  H04B9/00

CPC classification number: H04B10/60 ,  G02F2/002 ,  H04B10/64

Abstract: In the optical heterodyne receivers disclosed, the overall signal-to-noise ratio is improved by widening in terms of time duration the information-modulated optical pulses so that their bandwidth is comparable to the bandwidth of the detector. In particular, multiple reflection widening techniques are disclosed. Balanced detection with pulse widening in each path is also disclosed.

公开(公告)号：US3519937A

公开(公告)日：1970-07-07

申请号：US3519937D

申请日：1967-08-08

Applicant: BELL TELEPHONE LABOR INC

Inventor： HUBBARD WILLIAM M

IPC: H04L27/18 ,  H04L25/04 ,  H04L27/20 ,  H04B7/16 ,  H03C3/00

CPC classification number: H04L27/2057

公开(公告)号：US3433979A

公开(公告)日：1969-03-18

申请号：US3433979D

申请日：1967-03-28

Applicant: BELL TELEPHONE LABOR INC

Inventor： HUBBARD WILLIAM M

IPC: G01R19/00 ,  H03K5/24 ,  H04L27/18 ,  H04L27/233 ,  H03K5/20

CPC classification number: G01R19/0038 ,  H03K5/2463 ,  H04L27/2331

公开(公告)号：US3530298A

公开(公告)日：1970-09-22

申请号：US3530298D

申请日：1968-04-17

Applicant: BELL TELEPHONE LABOR INC

Inventor： HUBBARD WILLIAM M ,  KOMPFNER RUDOLF

IPC: H03C3/36 ,  H03K5/06 ,  H04B10/148 ,  H04B9/00

CPC classification number: H04B10/60 ,  H03C3/36 ,  H03K5/065 ,  H04B10/64

公开(公告)号：US3480869A

公开(公告)日：1969-11-25

申请号：US3480869D

申请日：1966-12-27

Applicant: BELL TELEPHONE LABOR INC

Inventor： HUBBARD WILLIAM M

IPC: H04L7/027 ,  H03D3/00

CPC classification number: H04L7/027