[go: up one dir, main page]

GB2007015B - Control apparatus - Google Patents

Control apparatus

Info

Publication number
GB2007015B
GB2007015B GB7840816A GB7840816A GB2007015B GB 2007015 B GB2007015 B GB 2007015B GB 7840816 A GB7840816 A GB 7840816A GB 7840816 A GB7840816 A GB 7840816A GB 2007015 B GB2007015 B GB 2007015B
Authority
GB
United Kingdom
Prior art keywords
control apparatus
control
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
GB7840816A
Other versions
GB2007015A (en
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 GB7840816A priority Critical patent/GB2007015B/en
Publication of GB2007015A publication Critical patent/GB2007015A/en
Application granted granted Critical
Publication of GB2007015B publication Critical patent/GB2007015B/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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/136—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
    • 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
    • H01S5/0687—Stabilising the frequency of the laser
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/136—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
    • H01S3/137—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity for stabilising of frequency
    • 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)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Semiconductor Lasers (AREA)
GB7840816A 1977-10-26 1978-10-17 Control apparatus Expired GB2007015B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7840816A GB2007015B (en) 1977-10-26 1978-10-17 Control apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4457277 1977-10-26
GB7840816A GB2007015B (en) 1977-10-26 1978-10-17 Control apparatus

Publications (2)

Publication Number Publication Date
GB2007015A GB2007015A (en) 1979-05-10
GB2007015B true GB2007015B (en) 1982-03-17

Family

ID=26265420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7840816A Expired GB2007015B (en) 1977-10-26 1978-10-17 Control apparatus

Country Status (1)

Country Link
GB (1) GB2007015B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375067A (en) * 1979-05-08 1983-02-22 Canon Kabushiki Kaisha Semiconductor laser device having a stabilized output beam
GB2143075B (en) * 1983-05-06 1987-12-09 Coherent Inc Lasers
GB2154787B (en) * 1984-01-17 1987-04-01 Standard Telephones Cables Ltd Laser stabilisation circuit
US4792956A (en) * 1986-05-13 1988-12-20 Litton Systems, Inc. Laser diode intensity and wavelength control
US4842358A (en) * 1987-02-20 1989-06-27 Litton Systems, Inc. Apparatus and method for optical signal source stabilization
US6214033B1 (en) 1992-12-28 2001-04-10 Matsushita Electric Industrial Co., Ltd. Medical laser apparatus and diagnostic/treatment apparatus using the medical laser apparatus
JP2596221B2 (en) * 1992-12-28 1997-04-02 松下電器産業株式会社 Medical laser device and diagnostic / therapy device
GB2360628A (en) * 2000-03-25 2001-09-26 Marconi Comm Ltd A stabilised radiation source

Also Published As

Publication number Publication date
GB2007015A (en) 1979-05-10

Similar Documents

Publication Publication Date Title
GB2000739B (en) Palettising-depalettising apparatus
GB1547143A (en) Bushar apparatus
GB2009474B (en) Remote control apparatus
GB2008352B (en) Digitzing apparatus
JPS5495878A (en) Process control device
GB2003300B (en) Time interval control apparatus
GB2008151B (en) Electrophoertic apparatus
GB2006047B (en) Cookong apparatus
GB1547155A (en) Dressing-undressing apparatus
GB2010684A (en) Apparatus
JPS5448327A (en) Control device
GB2006715B (en) Gripping-lifting apparatus
GB2007015B (en) Control apparatus
JPS548276A (en) Control device
GB2006420B (en) Aperture control apparatus
JPS5470510A (en) Control device
GB2007575B (en) Hair-trimming apparatus
JPS53147178A (en) Control device
GB2203223B (en) Control means
JPS547080A (en) Control device
GB2001782B (en) Process control apparatus
GB2010536B (en) Tape control apparatus
JPS5477882A (en) Control device
GB1557957A (en) Webtransport apparatus
JPS53107574A (en) Process control device

Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19981016