JPS5580934A - Optical transmitter - Google Patents

Optical transmitter

Info

Publication number
JPS5580934A
JPS5580934A JP15408678A JP15408678A JPS5580934A JP S5580934 A JPS5580934 A JP S5580934A JP 15408678 A JP15408678 A JP 15408678A JP 15408678 A JP15408678 A JP 15408678A JP S5580934 A JPS5580934 A JP S5580934A
Authority
JP
Japan
Prior art keywords
optical
signal
frequency region
transmitted
signals
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.)
Pending
Application number
JP15408678A
Other languages
Japanese (ja)
Inventor
Yoshio Ogushi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15408678A priority Critical patent/JPS5580934A/en
Publication of JPS5580934A publication Critical patent/JPS5580934A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To obtain an optical transmitter which can enhance the S/N of the 2nd signal by eliminating the undesired frequency region of the optical signal modulated by the lst signal and then connecting the optical signal modulated by the 2nd signal to the above mentioned frequency region. CONSTITUTION:The 1st and 2nd signals, such as digital pulse signal (a) and AM signal (b), are converted into optical signals (c) and (d) through light source driving circuits 1 and 3 to be transmitted to the optical fiber. Singal (c) is then branched off into optical fibers 8-10 featuring the difference lengths through optical branching unit 7 within optical filter 6, and then compounded via optical compounder 11. As a result, optical signal (c') is obtained with elimination of the undesired frequency region. Optical signal (d) and (c') are then changed into composite signal (e') through optical coupler 5 to be transmitted to a piece of the optical fiber.
JP15408678A 1978-12-15 1978-12-15 Optical transmitter Pending JPS5580934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15408678A JPS5580934A (en) 1978-12-15 1978-12-15 Optical transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15408678A JPS5580934A (en) 1978-12-15 1978-12-15 Optical transmitter

Publications (1)

Publication Number Publication Date
JPS5580934A true JPS5580934A (en) 1980-06-18

Family

ID=15576578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15408678A Pending JPS5580934A (en) 1978-12-15 1978-12-15 Optical transmitter

Country Status (1)

Country Link
JP (1) JPS5580934A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60175494U (en) * 1984-04-28 1985-11-20 安藤電気株式会社 variable output light source
KR20020084626A (en) * 2001-05-03 2002-11-09 윤태호 High Efficiency High Isolation Coupler and Manufacturing Method Using Low Loss Thin Film Package

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60175494U (en) * 1984-04-28 1985-11-20 安藤電気株式会社 variable output light source
KR20020084626A (en) * 2001-05-03 2002-11-09 윤태호 High Efficiency High Isolation Coupler and Manufacturing Method Using Low Loss Thin Film Package

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