JPS5376780A - Laser protecting circuit - Google Patents

Laser protecting circuit

Info

Publication number
JPS5376780A
JPS5376780A JP15303376A JP15303376A JPS5376780A JP S5376780 A JPS5376780 A JP S5376780A JP 15303376 A JP15303376 A JP 15303376A JP 15303376 A JP15303376 A JP 15303376A JP S5376780 A JPS5376780 A JP S5376780A
Authority
JP
Japan
Prior art keywords
laser
protecting circuit
laser protecting
overcurrent
degradation
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
JP15303376A
Other languages
Japanese (ja)
Other versions
JPS5937877B2 (en
Inventor
Masanori Kunida
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 JP15303376A priority Critical patent/JPS5937877B2/en
Publication of JPS5376780A publication Critical patent/JPS5376780A/en
Publication of JPS5937877B2 publication Critical patent/JPS5937877B2/en
Expired 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
    • H01S5/06825—Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation

Landscapes

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

Abstract

PURPOSE:To block flowing of overcurrent in a laser and prevent the degradation of the laser by controlling the reference voltage of an automatic output level control circuit APC of a light repeater only when a laser input signal is off.
JP15303376A 1976-12-20 1976-12-20 Laser protection circuit Expired JPS5937877B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15303376A JPS5937877B2 (en) 1976-12-20 1976-12-20 Laser protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15303376A JPS5937877B2 (en) 1976-12-20 1976-12-20 Laser protection circuit

Publications (2)

Publication Number Publication Date
JPS5376780A true JPS5376780A (en) 1978-07-07
JPS5937877B2 JPS5937877B2 (en) 1984-09-12

Family

ID=15553490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15303376A Expired JPS5937877B2 (en) 1976-12-20 1976-12-20 Laser protection circuit

Country Status (1)

Country Link
JP (1) JPS5937877B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10341539B2 (en) 2015-08-04 2019-07-02 Samsung Electronics Co., Ltd. Photographing apparatus module, user terminal including the same, and method of operating the user terminal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0529102Y2 (en) * 1989-04-17 1993-07-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10341539B2 (en) 2015-08-04 2019-07-02 Samsung Electronics Co., Ltd. Photographing apparatus module, user terminal including the same, and method of operating the user terminal

Also Published As

Publication number Publication date
JPS5937877B2 (en) 1984-09-12

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