GB2269932A - Method and control circuit for controlling a laser diode transmitter - Google Patents

Method and control circuit for controlling a laser diode transmitter

Info

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
Application number
GB9319225A
Other versions
GB9319225D0 (en
GB2269932B (en
Inventor
Denis O'shea
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Oyj
Original Assignee
Nokia Telecommunications Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of GB9319225D0 publication Critical patent/GB9319225D0/en
Publication of GB2269932A publication Critical patent/GB2269932A/en
Application granted granted Critical
Publication of GB2269932B publication Critical patent/GB2269932B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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).
GB9319225A 1991-03-21 1992-03-20 Method and control circuit for controlling a laser diode transmitter Expired - Fee Related GB2269932B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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