GB1517537A - Lasers and photo-detectors - Google Patents
Lasers and photo-detectorsInfo
- 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
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).
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)
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)
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 |
JPS5880887A (en) * | 1981-11-09 | 1983-05-16 | Nec Corp | Semiconductor laser photodiode photointegrated element |
JPS5875879A (en) * | 1981-10-29 | 1983-05-07 | Nec Corp | Photointegrated element |
JPS5884486A (en) * | 1981-11-13 | 1983-05-20 | Nec Corp | Semiconductor laser-photodetector beam integrate 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)
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 |
-
1975
- 1975-07-16 GB GB29810/75A patent/GB1517537A/en not_active Expired
-
1976
- 1976-07-08 CA CA256,581A patent/CA1076237A/en not_active Expired
- 1976-07-12 NL NLAANVRAGE7607677,A patent/NL185251C/en not_active IP Right Cessation
- 1976-07-15 JP JP51084477A patent/JPS5214393A/en active Pending
- 1976-07-16 DE DE19762632222 patent/DE2632222A1/en not_active Ceased
- 1976-07-16 FR FR7621835A patent/FR2318505A1/en active Granted
-
1985
- 1985-02-04 JP JP1985014598U patent/JPS60149156U/en active Pending
Cited By (1)
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 |
---|---|
FR2318505B1 (en) | 1982-10-08 |
FR2318505A1 (en) | 1977-02-11 |
NL185251B (en) | 1989-09-18 |
JPS5214393A (en) | 1977-02-03 |
JPS60149156U (en) | 1985-10-03 |
DE2632222A1 (en) | 1977-03-03 |
NL185251C (en) | 1990-02-16 |
CA1076237A (en) | 1980-04-22 |
NL7607677A (en) | 1977-01-18 |
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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 |