JPS5580384A - Oprical communication device - Google Patents

Oprical communication device

Info

Publication number
JPS5580384A
JPS5580384A JP15356478A JP15356478A JPS5580384A JP S5580384 A JPS5580384 A JP S5580384A JP 15356478 A JP15356478 A JP 15356478A JP 15356478 A JP15356478 A JP 15356478A JP S5580384 A JPS5580384 A JP S5580384A
Authority
JP
Japan
Prior art keywords
output
luminous
wave length
added
central wave
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
JP15356478A
Other languages
Japanese (ja)
Inventor
Takashi Toge
Naomasa Hanano
Tsutomu Fukugahara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15356478A priority Critical patent/JPS5580384A/en
Publication of JPS5580384A publication Critical patent/JPS5580384A/en
Pending 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
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • 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
    • H01S5/06837—Stabilising otherwise than by an applied electric field or current, e.g. by controlling the temperature

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Led Devices (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To secure transmission quality by a method wherein temperature dependence of the luminous central wave length of a luminous source is utilized, the transmitting side constitutes a negative feedback loop, the luminous source temperature is controlled and the central wave length is fiexed. CONSTITUTION:A driving circuit 2 mades an element 3 luminescent in response to input signals 1 and produces photo output 4. A part of the output is added to the photo diode 6 as feedback signals, said output is compared 7 with reference voltage 8, a driving current of the element 3 is cotrolled by giving error voltage to the circuit 2 to keep the output 4 fixed. On the other hand, another part of the output is added to the photo diode 11 as feedback signals through an optical filter 10, said output is compared with reference voltage 13, error voltage is added to the driving circuit 14 to make it to perform temperature control of luminous element 3 and to control luminous wave length. In this way the central wave length can be kept fixed to prevent transmission quality from deterioration.
JP15356478A 1978-12-11 1978-12-11 Oprical communication device Pending JPS5580384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15356478A JPS5580384A (en) 1978-12-11 1978-12-11 Oprical communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15356478A JPS5580384A (en) 1978-12-11 1978-12-11 Oprical communication device

Publications (1)

Publication Number Publication Date
JPS5580384A true JPS5580384A (en) 1980-06-17

Family

ID=15565246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15356478A Pending JPS5580384A (en) 1978-12-11 1978-12-11 Oprical communication device

Country Status (1)

Country Link
JP (1) JPS5580384A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62243383A (en) * 1986-04-16 1987-10-23 Hitachi Ltd Wavelength control system for semiconductor laser
JPS63257285A (en) * 1987-03-30 1988-10-25 シーメンス、アクチエンゲゼルシヤフト Control or adjustment device for semiconductor laser emission wavelength and optical power
JPH09186654A (en) * 1995-12-28 1997-07-15 Nec Corp Light transmission circuit
US5896201A (en) * 1997-10-14 1999-04-20 Fujitsu Limited Optical device for wavelength monitoring and wavelength control
WO2008029831A1 (en) * 2006-09-05 2008-03-13 Sharp Kabushiki Kaisha Light receiving element, and illumination device and display device using the same
JP2014017755A (en) * 2012-07-11 2014-01-30 Nec Corp Optical transceiver, and wavelength adjusting method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62243383A (en) * 1986-04-16 1987-10-23 Hitachi Ltd Wavelength control system for semiconductor laser
JPS63257285A (en) * 1987-03-30 1988-10-25 シーメンス、アクチエンゲゼルシヤフト Control or adjustment device for semiconductor laser emission wavelength and optical power
JPH09186654A (en) * 1995-12-28 1997-07-15 Nec Corp Light transmission circuit
US5896201A (en) * 1997-10-14 1999-04-20 Fujitsu Limited Optical device for wavelength monitoring and wavelength control
WO2008029831A1 (en) * 2006-09-05 2008-03-13 Sharp Kabushiki Kaisha Light receiving element, and illumination device and display device using the same
JP2014017755A (en) * 2012-07-11 2014-01-30 Nec Corp Optical transceiver, and wavelength adjusting method

Similar Documents

Publication Publication Date Title
ATE6453T1 (en) CIRCUIT ARRANGEMENT WITH A LASER DIODE FOR TRANSMISSION OF MESSAGE SIGNALS VIA AN OPTICAL WAVE.
JPS5316176A (en) Nc device loaded with sequential controller
JPS5580384A (en) Oprical communication device
JPS52132287A (en) Input apparatus
JPS5355053A (en) Photoelectric encoder
JPS53116794A (en) Laser device for optical communication
JPS57107607A (en) Array antenna device
DK332280A (en) PARALLEL CONTROL CLUTCH
JPS52125286A (en) Radiating device for bluelight
JPS57173238A (en) Optical transmitter
JPS5315706A (en) Communicaiton control unit
JPS5450203A (en) Transmitter for optical fiber communication
JPS5353239A (en) Variable power allotter
JPS56119543A (en) Distortion compensating circuit
JPS54152901A (en) Light communication unit
JPS54121006A (en) Receiving device for optical communication
JPS5394163A (en) Negative feedback power amplifier
JPS5675754A (en) Synchronizing signal pickup system
JPS5476248A (en) Light control circuit
JPS53132909A (en) Driver circuit for luminous element
JPS5355131A (en) Optical fiber coupling circuit
JPS5342747A (en) Optical logic device device
JPS5680005A (en) Device for stabilizing quantity of light
JPS53137162A (en) Optical modulator
JPS54132181A (en) Optical modulator