GB1517537A - Lasers and photo-detectors - Google Patents

Lasers and photo-detectors

Info

Publication number
GB1517537A
GB1517537A GB29810/75A GB2981075A GB1517537A GB 1517537 A GB1517537 A GB 1517537A GB 29810/75 A GB29810/75 A GB 29810/75A GB 2981075 A GB2981075 A GB 2981075A GB 1517537 A GB1517537 A GB 1517537A
Authority
GB
United Kingdom
Prior art keywords
laser
output
lasers
photodetector
detectors
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.)
Expired
Application number
GB29810/75A
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB29810/75A priority Critical patent/GB1517537A/en
Priority to CA256,581A priority patent/CA1076237A/en
Priority to NLAANVRAGE7607677,A priority patent/NL185251C/en
Priority to JP51084477A priority patent/JPS5214393A/en
Priority to DE19762632222 priority patent/DE2632222A1/en
Priority to FR7621835A priority patent/FR2318505A1/en
Publication of GB1517537A publication Critical patent/GB1517537A/en
Priority to JP1985014598U priority patent/JPS60149156U/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
    • H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
    • H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Semiconductor Lasers (AREA)
  • Lasers (AREA)

Abstract

1517537 Semiconductor lasers POST OFFICE 5 Aug 1976 [16 July 1975] 29810/75 Heading H1C A single piece of semiconductor material 12 includes a laser 15 and a photodetector 14 arranged to receive an output beam from the laser. By monitoring the laser output in this way a further output beam, used, e.g. in an optical communication system, may be maintained at a constant intensity level (using the photodetector output in a feedback loop to the laser pumping source 24).
GB29810/75A 1975-07-16 1975-07-16 Lasers and photo-detectors Expired GB1517537A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB29810/75A GB1517537A (en) 1975-07-16 1975-07-16 Lasers and photo-detectors
CA256,581A CA1076237A (en) 1975-07-16 1976-07-08 Lasers and photo-detectors
NLAANVRAGE7607677,A NL185251C (en) 1975-07-16 1976-07-12 SEMICONDUCTOR LIGHT SOURCE.
JP51084477A JPS5214393A (en) 1975-07-16 1976-07-15 Laser and optical detector
DE19762632222 DE2632222A1 (en) 1975-07-16 1976-07-16 SEMI-CONDUCTOR LIGHT SOURCE
FR7621835A FR2318505A1 (en) 1975-07-16 1976-07-16 IMPROVEMENTS IN SEMICONDUCTOR LUMINOUS RADIATION SOURCES
JP1985014598U JPS60149156U (en) 1975-07-16 1985-02-04 Semiconductor light source with laser and photodetector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29810/75A GB1517537A (en) 1975-07-16 1975-07-16 Lasers and photo-detectors

Publications (1)

Publication Number Publication Date
GB1517537A true GB1517537A (en) 1978-07-12

Family

ID=10297543

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29810/75A Expired GB1517537A (en) 1975-07-16 1975-07-16 Lasers and photo-detectors

Country Status (6)

Country Link
JP (2) JPS5214393A (en)
CA (1) CA1076237A (en)
DE (1) DE2632222A1 (en)
FR (1) FR2318505A1 (en)
GB (1) GB1517537A (en)
NL (1) NL185251C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120457A (en) * 1982-04-27 1983-11-30 Kokusai Denshin Denwa Co Ltd Distributed feedback semiconductor laser intergrated with monitor

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903554C2 (en) * 1979-01-31 1983-11-17 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Opto-coupler for opto-electronic signal transmission
US4349906A (en) * 1979-09-18 1982-09-14 Xerox Corporation Optically controlled integrated current diode lasers
JPS5789289A (en) * 1980-11-25 1982-06-03 Sharp Corp Semiconductor device
JPS57139984A (en) * 1981-02-24 1982-08-30 Nec Corp Buried photo emitting and receiving semiconductor integrated device
JPS5884486A (en) * 1981-11-13 1983-05-20 Nec Corp Semiconductor laser-photodetector beam integrate element
JPS5875879A (en) * 1981-10-29 1983-05-07 Nec Corp Photointegrated element
JPS5880887A (en) * 1981-11-09 1983-05-16 Nec Corp Semiconductor laser photodiode photointegrated element
JPS5871676A (en) * 1981-10-23 1983-04-28 Nec Corp Buried hetero structure semiconductor laser photodiode photointegrated element
JPS5875877A (en) * 1981-10-30 1983-05-07 Nec Corp Monitor built-in semiconductor laser element
JPS58162090A (en) * 1982-03-23 1983-09-26 Nippon Telegr & Teleph Corp <Ntt> Semiconductor laser

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1007876A (en) * 1963-08-15 1965-10-22 Mullard Ltd Improvements in and relating to opto-electronic semiconductor devices
GB1100682A (en) * 1963-09-26 1968-01-24 Mullard Ltd Improvements in opto-electronic semiconductor devices
DE1190506B (en) * 1963-10-10 1965-04-08 Siemens Ag Optically controlled switching or breakover diode with at least four zones of alternately different line types
FR1464724A (en) * 1964-11-07 1967-01-06 Ibm Photoelectric semiconductor device
JPS5081695A (en) * 1973-11-21 1975-07-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120457A (en) * 1982-04-27 1983-11-30 Kokusai Denshin Denwa Co Ltd Distributed feedback semiconductor laser intergrated with monitor

Also Published As

Publication number Publication date
CA1076237A (en) 1980-04-22
DE2632222A1 (en) 1977-03-03
FR2318505B1 (en) 1982-10-08
NL185251B (en) 1989-09-18
JPS60149156U (en) 1985-10-03
NL185251C (en) 1990-02-16
NL7607677A (en) 1977-01-18
JPS5214393A (en) 1977-02-03
FR2318505A1 (en) 1977-02-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950805