JPS5683089A - Light modulation system - Google Patents

Light modulation system

Info

Publication number
JPS5683089A
JPS5683089A JP15924479A JP15924479A JPS5683089A JP S5683089 A JPS5683089 A JP S5683089A JP 15924479 A JP15924479 A JP 15924479A JP 15924479 A JP15924479 A JP 15924479A JP S5683089 A JPS5683089 A JP S5683089A
Authority
JP
Japan
Prior art keywords
signals
frequency
semiconductor laser
laser
modulation
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
JP15924479A
Other languages
Japanese (ja)
Other versions
JPS6362915B2 (en
Inventor
Kenichi Sato
Koichi Asatani
Tetsuya Miki
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP15924479A priority Critical patent/JPS5683089A/en
Publication of JPS5683089A publication Critical patent/JPS5683089A/en
Publication of JPS6362915B2 publication Critical patent/JPS6362915B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
    • H01S5/06213—Amplitude modulation

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To prevent the deterioration of wave forms caused by the fluctuation of a speckle pattern resulting from the coherence of a laser by a method wherein high- frequency signals with a frequency component sufficiently higher than a signal frequency component of modulation signals are overlapped to the modulation signals. CONSTITUTION:Modulation signal currents 1 and the square-wave signals of repetitive frequency sufficiently higher than the upper-limit frequency of the signal currents 1 are inputted to a semiconductor laser drive circuit 3, and mixed. A semiconductor laser 7 is driven by the output of the drive circuit 3. Laser rays from the semiconductor laser 7 are transmitted by an optical fiber 8, and fed to a demodulation circuit 11 through a light detector 9 and a receiving amplifier 10, and original signals are obtained.
JP15924479A 1979-12-10 1979-12-10 Light modulation system Granted JPS5683089A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15924479A JPS5683089A (en) 1979-12-10 1979-12-10 Light modulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15924479A JPS5683089A (en) 1979-12-10 1979-12-10 Light modulation system

Publications (2)

Publication Number Publication Date
JPS5683089A true JPS5683089A (en) 1981-07-07
JPS6362915B2 JPS6362915B2 (en) 1988-12-05

Family

ID=15689488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15924479A Granted JPS5683089A (en) 1979-12-10 1979-12-10 Light modulation system

Country Status (1)

Country Link
JP (1) JPS5683089A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799069A (en) * 1986-04-18 1989-01-17 Minolta Camera Kabushiki Kaisha Laser recording apparatus
JP2000338242A (en) * 1999-05-24 2000-12-08 Topcon Corp Light source means and light wave range finder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110112647B (en) * 2015-07-28 2021-05-18 海信集团有限公司 DLP projection system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5354905A (en) * 1976-10-29 1978-05-18 Nec Corp Optical transmitting/receiving device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5354905A (en) * 1976-10-29 1978-05-18 Nec Corp Optical transmitting/receiving device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799069A (en) * 1986-04-18 1989-01-17 Minolta Camera Kabushiki Kaisha Laser recording apparatus
JP2000338242A (en) * 1999-05-24 2000-12-08 Topcon Corp Light source means and light wave range finder

Also Published As

Publication number Publication date
JPS6362915B2 (en) 1988-12-05

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