EP1456917A4 - Return path transmitter having a closed laser control loop that is employed in a hybrid fiber / coax transmission system - Google Patents
Return path transmitter having a closed laser control loop that is employed in a hybrid fiber / coax transmission systemInfo
- Publication number
- EP1456917A4 EP1456917A4 EP02798512A EP02798512A EP1456917A4 EP 1456917 A4 EP1456917 A4 EP 1456917A4 EP 02798512 A EP02798512 A EP 02798512A EP 02798512 A EP02798512 A EP 02798512A EP 1456917 A4 EP1456917 A4 EP 1456917A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- employed
- transmission system
- control loop
- return path
- laser control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25751—Optical arrangements for CATV or video distribution
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/504—Laser transmitters using direct modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/58—Compensation for non-linear transmitter output
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/0617—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium using memorised or pre-programmed laser characteristics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/06804—Stabilisation of laser output parameters by monitoring an external parameter, e.g. temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/06808—Stabilisation of laser output parameters by monitoring the electrical laser parameters, e.g. voltage or current
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Nonlinear Science (AREA)
- Optical Communication System (AREA)
- Semiconductor Lasers (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US34079601P | 2001-12-12 | 2001-12-12 | |
US340796P | 2001-12-12 | ||
PCT/US2002/039871 WO2003050572A2 (en) | 2001-12-12 | 2002-12-12 | Return path transmitter having a closed laser control loop |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1456917A2 EP1456917A2 (en) | 2004-09-15 |
EP1456917A4 true EP1456917A4 (en) | 2005-12-07 |
Family
ID=32770189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02798512A Withdrawn EP1456917A4 (en) | 2001-12-12 | 2002-12-12 | Return path transmitter having a closed laser control loop that is employed in a hybrid fiber / coax transmission system |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1456917A4 (en) |
CN (1) | CN1618152A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014034047A1 (en) | 2012-08-28 | 2014-03-06 | 日本電気株式会社 | Optical transmitter, and bias voltage control method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5604757A (en) * | 1994-05-10 | 1997-02-18 | E-Tek Dynamics, Inc. | Multichannel, programmable laser diode power supply, stabilizer and controller |
WO2000025459A2 (en) * | 1998-10-09 | 2000-05-04 | Scientific-Atlanta, Inc. | Digital optical transceiver |
US6122302A (en) * | 1997-12-10 | 2000-09-19 | Harmonic Inc. | Automatic compensation of CNR and OMI in a laser transmitter |
US6233262B1 (en) * | 1997-08-11 | 2001-05-15 | Eci Telecom Ltd. | Device and method for monitoring and controlling laser wavelength |
US6252692B1 (en) * | 1996-06-07 | 2001-06-26 | Nortel Networks Limited | Optical fibre transmission systems |
-
2002
- 2002-12-12 EP EP02798512A patent/EP1456917A4/en not_active Withdrawn
- 2002-12-12 CN CNA028280091A patent/CN1618152A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5604757A (en) * | 1994-05-10 | 1997-02-18 | E-Tek Dynamics, Inc. | Multichannel, programmable laser diode power supply, stabilizer and controller |
US6252692B1 (en) * | 1996-06-07 | 2001-06-26 | Nortel Networks Limited | Optical fibre transmission systems |
US6233262B1 (en) * | 1997-08-11 | 2001-05-15 | Eci Telecom Ltd. | Device and method for monitoring and controlling laser wavelength |
US6122302A (en) * | 1997-12-10 | 2000-09-19 | Harmonic Inc. | Automatic compensation of CNR and OMI in a laser transmitter |
WO2000025459A2 (en) * | 1998-10-09 | 2000-05-04 | Scientific-Atlanta, Inc. | Digital optical transceiver |
Also Published As
Publication number | Publication date |
---|---|
CN1618152A (en) | 2005-05-18 |
EP1456917A2 (en) | 2004-09-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2364790B (en) | Optical transmitter and optical transmission system | |
AU2001280615A1 (en) | Closed loop glycemic index system | |
AU1477900A (en) | Resonator fiber bidirectional coupler | |
AU2001265275A1 (en) | Adaptive modulation for a wireless transmission system | |
GB0000657D0 (en) | An optical transmission system | |
AU2001290614A1 (en) | Optical networking unit employing optimized optical packaging | |
EP1422898A4 (en) | Transmitter and transmission control method | |
AU2002226873A1 (en) | Optical waveguide transmission devices | |
AU2001284435A1 (en) | Optical signal transmitter and optical signal transmitting method | |
EP1063549A4 (en) | Transmitter/receiver for optical parallel transmission and board for optical module | |
AU4783299A (en) | High-speed data transmission in a mobile system | |
AU2001262500A1 (en) | Underwater communications system using electromagnetic signal transmission | |
GB0122131D0 (en) | A control for a vehicle with a transmission | |
AU1127600A (en) | Fiber optic transmitter | |
AU2002363993A1 (en) | Return path transmitter having a closed laser control loop | |
AU4082501A (en) | Data transmission management system | |
EP1456917A4 (en) | Return path transmitter having a closed laser control loop that is employed in a hybrid fiber / coax transmission system | |
GB9918976D0 (en) | Transmission output control apparatus having a directional coupler with a variable coupling length | |
AU4088801A (en) | Transmitting video data over a communications network | |
AU2001242301A1 (en) | A light transmitting device and methods for producing and operating the same | |
AU2001277858A1 (en) | Interactive data transmission system | |
GB2397388B (en) | Optical transmitter and optical transmission system | |
AU2002339053A1 (en) | Modulator for electromagnetic signals transmitted by a contactless transmission/reception system | |
AU2662801A (en) | Data transmission in a communications system | |
AU2002223752A1 (en) | Device for controlling a wavelength-stabilised laser optical transmitter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO |
|
17P | Request for examination filed |
Effective date: 20040729 |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20051026 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: 7H 01S 5/0683 B Ipc: 7H 01S 3/10 B Ipc: 7H 04B 10/155 A |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20060811 |