JPS53148292A - Direct viewing apparatus of light output to current characteristics of semiconductor lasers - Google Patents

Direct viewing apparatus of light output to current characteristics of semiconductor lasers

Info

Publication number
JPS53148292A
JPS53148292A JP6211177A JP6211177A JPS53148292A JP S53148292 A JPS53148292 A JP S53148292A JP 6211177 A JP6211177 A JP 6211177A JP 6211177 A JP6211177 A JP 6211177A JP S53148292 A JPS53148292 A JP S53148292A
Authority
JP
Japan
Prior art keywords
light output
semiconductor lasers
current characteristics
viewing apparatus
direct viewing
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
JP6211177A
Other languages
Japanese (ja)
Inventor
Ichiro Ikushima
Minoru Maeda
Yasuo Minae
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6211177A priority Critical patent/JPS53148292A/en
Publication of JPS53148292A publication Critical patent/JPS53148292A/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
    • H01S5/0014—Measuring characteristics or properties thereof

Landscapes

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

Abstract

PURPOSE:To measure noise outputs to meas light output of semiconductor laser outputs by forming a light output measuring part with a wide band photo detector and a wide band oscillograph, connecting the output of the photo detector to a mean value detecting circuit and a tuning receiving circuit and connecting the respective outputs to a divider circuit.
JP6211177A 1977-05-30 1977-05-30 Direct viewing apparatus of light output to current characteristics of semiconductor lasers Pending JPS53148292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6211177A JPS53148292A (en) 1977-05-30 1977-05-30 Direct viewing apparatus of light output to current characteristics of semiconductor lasers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6211177A JPS53148292A (en) 1977-05-30 1977-05-30 Direct viewing apparatus of light output to current characteristics of semiconductor lasers

Publications (1)

Publication Number Publication Date
JPS53148292A true JPS53148292A (en) 1978-12-23

Family

ID=13190610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6211177A Pending JPS53148292A (en) 1977-05-30 1977-05-30 Direct viewing apparatus of light output to current characteristics of semiconductor lasers

Country Status (1)

Country Link
JP (1) JPS53148292A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59169189A (en) * 1983-03-16 1984-09-25 Nec Corp Semiconductor laser drive current detecting circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59169189A (en) * 1983-03-16 1984-09-25 Nec Corp Semiconductor laser drive current detecting circuit

Similar Documents

Publication Publication Date Title
JPS5590843A (en) Method of measuring contaminated gas
JPS53148292A (en) Direct viewing apparatus of light output to current characteristics of semiconductor lasers
WO1989012806A3 (en) Apparatus for measuring the radiated power of lasers
JPS53105992A (en) Stabilizing circuit for lumious element output
JPS5441184A (en) Two wavelength spectrophotometer
JPS5666713A (en) Measuring device of beam diameter of laser light
JPS52104289A (en) Atomic spectrum generator
GB1326448A (en) Atomic absorption photometer
JPS5566725A (en) Temperature detector
JPS5377659A (en) Distance detector
JPS55131718A (en) Measuring device
JPS5447672A (en) Measuring method of transmission loss in optical transmission lines
SU597978A1 (en) Arrangement for measuring microwave power
JPS5377660A (en) Distance measuring device
JPS5373153A (en) Measuring apparatus for dispersion of optical fibers
JPS54109863A (en) Range measuring device
JPS57122327A (en) Temperature measuring device utilizing light wave guide
LANG et al. Determination of atmospheric structure function by using a single coherent detector(Wave structure function calculation for atmospheric turbulence using single beam laser receiver)
BATCHMAN Investigation of the quantum efficiency of optical heterodyne detectors(Final Report)
JPS536090A (en) Zero adjustment circuit of spectrophotometer
JPS5285874A (en) X-ray detection apparatus
JPS5210750A (en) Tape width tester
JPS5512631A (en) Specific gravity detector lead storage battery electrolyte
JPS52113759A (en) Measuring apparatus for optical fiber loss
JPS5717836A (en) Measuring device for light path frequency characteristic