公开(公告)号：JPH09129985A

公开(公告)日：1997-05-16

申请号：JP23628496

申请日：1996-09-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SWAMINATHAN VENKATARAMAN ,  WOODWARD SHERYL L ,  BODEEP GEORGE E

IPC: H01L23/38 ,  G02B6/42 ,  H01S3/04 ,  H01S5/00 ,  H01S5/024 ,  H04B10/155 ,  H01S3/18 ,  H01S3/043

Abstract: PROBLEM TO BE SOLVED: To improve the reliability of controlling temperature within a loop device by surrounding an optical transmitter with an adapter, connecting a heat exchanging element to the adapter, and mounting the heat exchanging element on mounting block so as to cool the optical transmitter SOLUTION: A front face 321 of an optical transmitter 320 allows the modulated optical signal to enter an optical fiber cable 310. An adapter 340 is thermally kept in contact with a heat exchanging element 350 and the optical transmitter 320. the heat exchanging element 350 and a printed circuit board 330 are mounted on a mounting block 360. The heat exchanging element 350 has a function of thermionic cooling by peltier effect. A sensor lead 382 is connected with a sensor 381 on the adapter 340. The sensor lead 382 is connected with a controller 380 for cooling device, so that a current is allowed to flow through a lead 384 to the heat exchanging element 350 in contact with the adapter 340.

公开(公告)号：CA2291917A1

公开(公告)日：2000-06-16

申请号：CA2291917

申请日：1999-12-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SWAMINATHAN VENKATARAMAN ,  MAGILL PETER D ,  CHAND NARESH ,  DAUGHERTY THOMAS HENRY

IPC: H04B10/50 ,  H04B10/516 ,  H04B10/556 ,  H04J1/00 ,  H04J14/02 ,  H04L27/18 ,  H04N7/22 ,  H04B10/20

Abstract: This invention is a new communication system in which multichannel broadcast digital services are distributed to each user with the broadcast video signal riding in the passband above a digital baseband signal. The system can deliver more than 1 Gbps additional bandwidth to each subscriber. The passband bandwidth will accommodate growth in downstream services including video on demand, higher speed web downloads including improved streaming audio and video, HDTV, interactive video, and personalized video. The invention requires only a single transmitter, a single transmission fiber and a single receiver for each user. A single transmitter, single fiber, single receiver system is much less expensive than two systems, one transmitting baseband and the other passband. A single receiver is greatly cost beneficial to achieving an economical fiber to the home solution where equipment at the end user location is not shared among multiple end users. In an exemplary embodiment, an optical communication system comprises a diplexer for electronically combining the baseband and passband signals, a digital laser transmitter for generating an optical signal containing the combined signals, a length of optical transmission fiber for transmitting the optical signal, and, for each user or group of users, an optical receiver coupled to the fiber.

公开(公告)号：DE60034281T2

公开(公告)日：2007-12-20

申请号：DE60034281

申请日：2000-07-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHAND NARESH ,  DAUGHERTY THOMAS HENRY ,  MUYS WOULTERUS ,  PARK YONG-KWAN ,  SWAMINATHAN VENKATARAMAN

IPC: H04N7/22 ,  H04B10/272 ,  H04B10/50 ,  H04J14/00 ,  H04J14/02 ,  H04J14/04 ,  H04J14/06

Abstract: A new communication system in which multichannel broadcast digital services are distributed to each user with the broadcast services signal riding in the passband above a digital baseband signal, can deliver more than 1 Gbps additional bandwidth to each subscriber. The passband bandwidth will accommodate growth in downstream services including video on demand, higher speed web downloads including improved streaming audio and video, HDTV, interactive video, and personalized video. The invention requires only a single fiber path and a single optical receiver for each user or group of users. A single fiber, single optical receiver system is much less expensive than two systems, one transmitting baseband and the other passband. A single receiver is greatly cost beneficial to achieving economical fiber to the home.

公开(公告)号：CA2314854A1

公开(公告)日：2001-02-06

申请号：CA2314854

申请日：2000-08-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SWAMINATHAN VENKATARAMAN ,  DAUGHERTY THOMAS HENRY ,  CHAND NARESH ,  MUYS WOUTERUS ,  PARK YONG-KWAN

IPC: H04N7/22 ,  H04B10/272 ,  H04B10/50 ,  H04J14/00 ,  H04J14/02 ,  H04J14/04 ,  H04J14/06 ,  H04B10/02

Abstract: The present invention relates to an optical communication system for transmitting both baseband and passband signals on a common optical transmission path. The system is comprised of a source of an electrical baseband signal a nd a source of an electrical passband signal modulated for digital broadcast services. A first optical transmitter is provided that is responsive to the electrical baseband signal for generating an optical baseband signal. A second optical transmitt er is provided that is responsive to the electrical passband signal for generating an optical passband signal. An optical combiner is optically coupled to the transmitter s for combining the optical baseband and passband signals into a combined optical signal. An optical transmission path is provided optically coupled to the combiner for transmitting the combined optical signal. An optical receiver is optically coupled to the transmission path for receiving transmitted optical signals.

公开(公告)号：DE60034281D1

公开(公告)日：2007-05-24

申请号：DE60034281

申请日：2000-07-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHAND NARESH ,  DAUGHERTY THOMAS HENRY ,  MUYS WOULTERUS ,  PARK YONG-KWAN ,  SWAMINATHAN VENKATARAMAN

IPC: H04N7/22 ,  H04B10/272 ,  H04B10/50 ,  H04J14/00 ,  H04J14/02 ,  H04J14/04 ,  H04J14/06

Abstract: A new communication system in which multichannel broadcast digital services are distributed to each user with the broadcast services signal riding in the passband above a digital baseband signal, can deliver more than 1 Gbps additional bandwidth to each subscriber. The passband bandwidth will accommodate growth in downstream services including video on demand, higher speed web downloads including improved streaming audio and video, HDTV, interactive video, and personalized video. The invention requires only a single fiber path and a single optical receiver for each user or group of users. A single fiber, single optical receiver system is much less expensive than two systems, one transmitting baseband and the other passband. A single receiver is greatly cost beneficial to achieving economical fiber to the home.

公开(公告)号：CA2314854C

公开(公告)日：2005-05-10

申请号：CA2314854

申请日：2000-08-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SWAMINATHAN VENKATARAMAN ,  MUYS WOUTERUS ,  CHAND NARESH ,  PARK YONG-KWAN ,  DAUGHERTY THOMAS HENRY

IPC: H04N7/22 ,  H04B10/272 ,  H04B10/50 ,  H04J14/00 ,  H04J14/02 ,  H04J14/04 ,  H04J14/06 ,  H04B10/02

Abstract: The present invention relates to an optical communication system for transmitting both baseband and passband signals on a common optical transmission path. The system is comprised of a source of an electrical baseband signal a nd a source of an electrical passband signal modulated for digital broadcast services. A first optical transmitter is provided that is responsive to the electrical baseband signal for generating an optical baseband signal. A second optical transmitt er is provided that is responsive to the electrical passband signal for generating an optical passband signal. An optical combiner is optically coupled to the transmitter s for combining the optical baseband and passband signals into a combined optical signal. An optical transmission path is provided optically coupled to the combiner for transmitting the combined optical signal. An optical receiver is optically coupled to the transmission path for receiving transmitted optical signals.