GB2269932A - Method and control circuit for controlling a laser diode transmitter - Google Patents
Method and control circuit for controlling a laser diode transmitterInfo
- Publication number
- GB2269932A GB2269932A GB9319225A GB9319225A GB2269932A GB 2269932 A GB2269932 A GB 2269932A GB 9319225 A GB9319225 A GB 9319225A GB 9319225 A GB9319225 A GB 9319225A GB 2269932 A GB2269932 A GB 2269932A
- Authority
- GB
- United Kingdom
- Prior art keywords
- laser diode
- control circuit
- controlling
- diode transmitter
- mean
- 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.)
- Granted
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
- H04B10/50—Transmitters
- H04B10/564—Power control
-
- 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
- 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
- H01S5/06832—Stabilising during amplitude modulation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
- Optical Communication System (AREA)
Abstract
The invention relates to a control method and a control circuit for a laser diode transmitter. The control circuit comprises a monitoring photo diode means (PD) for detecting a portion of an optical output signal of the laser diode transmitter (LD) and generating a monitor signal (4a) representing said optical output signal. In the invention, the control circuit further comprises a peak level detector means (6, 7) for detecting the peak level of the monitor signal (4a) and the peak level of a data signal to be transmitted, first control means (2, 9) for controlling the peak level of the optical output of the laser diode transmitter (LD) on the basis of a difference between said peak levels detected by the peak level detector means (6, 7), mean level detector means (5, 8) for detecting the mean level of the monitor signal (4a) and the mean level of the data signal to be transmitted, and second control means (3, 10) for controlling the mean level of the output of the laser diode transmitter (LD) on the basis of a difference between said mean levels detected by the mean level detector means (5, 8).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI911382A FI911382A0 (en) | 1991-03-21 | 1991-03-21 | REGLERINGSFOERFARANDE OCH REGLERINGSKRETS FOER EN LASERDIODSAENDARE. |
PCT/FI1992/000079 WO1992017007A1 (en) | 1991-03-21 | 1992-03-20 | Method and control circuit for controlling a laser diode transmitter |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9319225D0 GB9319225D0 (en) | 1993-12-15 |
GB2269932A true GB2269932A (en) | 1994-02-23 |
GB2269932B GB2269932B (en) | 1995-02-15 |
Family
ID=8532164
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9319225A Expired - Fee Related GB2269932B (en) | 1991-03-21 | 1992-03-20 | Method and control circuit for controlling a laser diode transmitter |
Country Status (4)
Country | Link |
---|---|
FI (1) | FI911382A0 (en) |
GB (1) | GB2269932B (en) |
SE (1) | SE516099C2 (en) |
WO (1) | WO1992017007A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69820393T2 (en) * | 1997-10-28 | 2004-10-07 | Broadband Royalty Corp | Optical transmitter for noise pulse reduction in a fiber optic connection |
CN110707520B (en) * | 2019-09-20 | 2021-01-08 | 武汉光迅科技股份有限公司 | Drive circuit of directly-modulated laser and directly-modulated transmitter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0218449A2 (en) * | 1985-09-30 | 1987-04-15 | Kabushiki Kaisha Toshiba | Apparatus for stabilizing the optical output power of a semiconductor laser |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6190487A (en) * | 1984-10-11 | 1986-05-08 | Nippon Telegr & Teleph Corp <Ntt> | Semiconductor laser drive circuit |
-
1991
- 1991-03-21 FI FI911382A patent/FI911382A0/en unknown
-
1992
- 1992-03-20 GB GB9319225A patent/GB2269932B/en not_active Expired - Fee Related
- 1992-03-20 WO PCT/FI1992/000079 patent/WO1992017007A1/en active IP Right Grant
-
1993
- 1993-09-21 SE SE9303077A patent/SE516099C2/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0218449A2 (en) * | 1985-09-30 | 1987-04-15 | Kabushiki Kaisha Toshiba | Apparatus for stabilizing the optical output power of a semiconductor laser |
Non-Patent Citations (2)
Title |
---|
NIPPON TELEGR & TELEPH CORP. NTT * |
Patent Abstracts of Japan, Vol 10, No 268, E436, abstracts of JP 61-90487, PUBL 1986-05-08 CONT. * |
Also Published As
Publication number | Publication date |
---|---|
FI911382A0 (en) | 1991-03-21 |
SE9303077L (en) | 1993-11-11 |
SE516099C2 (en) | 2001-11-19 |
WO1992017007A1 (en) | 1992-10-01 |
SE9303077D0 (en) | 1993-09-21 |
GB9319225D0 (en) | 1993-12-15 |
GB2269932B (en) | 1995-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20110320 |