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JPS5690642A - Optical communication system - Google Patents

Optical communication system

Info

Publication number
JPS5690642A
JPS5690642A JP16725979A JP16725979A JPS5690642A JP S5690642 A JPS5690642 A JP S5690642A JP 16725979 A JP16725979 A JP 16725979A JP 16725979 A JP16725979 A JP 16725979A JP S5690642 A JPS5690642 A JP S5690642A
Authority
JP
Japan
Prior art keywords
light
lambdam
lattice
diffracted
lambdae
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
JP16725979A
Other languages
Japanese (ja)
Inventor
Norito Suzuki
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.)
KYOTO GIKEN KK
Original Assignee
KYOTO GIKEN KK
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 KYOTO GIKEN KK filed Critical KYOTO GIKEN KK
Priority to JP16725979A priority Critical patent/JPS5690642A/en
Publication of JPS5690642A publication Critical patent/JPS5690642A/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
    • H01S5/10—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
    • H01S5/14—External cavity lasers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
    • 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
    • H01S5/14—External cavity lasers
    • H01S5/141—External cavity lasers using a wavelength selective device, e.g. a grating or etalon
    • 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
    • H01S5/14—External cavity lasers
    • H01S5/141—External cavity lasers using a wavelength selective device, e.g. a grating or etalon
    • H01S5/143—Littman-Metcalf configuration, e.g. laser - grating - mirror
    • 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
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
    • H01S5/4031—Edge-emitting structures
    • H01S5/4062—Edge-emitting structures with an external cavity or using internal filters, e.g. Talbot filters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To enable multiplex communication by wavelength discrimination while minimizing signal distortion on an optical fiber transmission line, by fixing oscillation wavelengths of semiconductor lasers. CONSTITUTION:When semiconductor lasers 8 are arranged a stigmatic focus near contact 6 of lattice 1, light of wavelength lambdam is diffracted by lattice 1 and the primary diffracted light travels in direction thetam determined by lambdam=dsinthetam [where (d) is a lattice constant and thetam is an incident angle]. This light is reflected by reflex mirror 7 and returns to lattice 1, where it is diffracted again. The diffraction formula is the same as above, and consequently the light diffracted twice returns to laser 8 which has emitted this light to fix the oscillation wavelength of this laser to lambdam. Other lasers 8 positioned at different positions thetae also have wavelengths lambdae fixed to the value determined by lambdae=dsinthetae. Lights of those wavelengths lambdam and lambdae travel in the same direction and are focussed on point 9.
JP16725979A 1979-12-23 1979-12-23 Optical communication system Pending JPS5690642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16725979A JPS5690642A (en) 1979-12-23 1979-12-23 Optical communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16725979A JPS5690642A (en) 1979-12-23 1979-12-23 Optical communication system

Publications (1)

Publication Number Publication Date
JPS5690642A true JPS5690642A (en) 1981-07-22

Family

ID=15846411

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16725979A Pending JPS5690642A (en) 1979-12-23 1979-12-23 Optical communication system

Country Status (1)

Country Link
JP (1) JPS5690642A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5594744A (en) * 1994-09-13 1997-01-14 Photonetics S.A. Singlemode laser source tunable in wavelength with a self-aligned external cavity
EP1006628A1 (en) * 1998-12-04 2000-06-07 Photonetics Multi-wavelength source
EP1139523A2 (en) * 2000-03-30 2001-10-04 Ando Electric Co., Ltd. Light source for an external cavity laser

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5594744A (en) * 1994-09-13 1997-01-14 Photonetics S.A. Singlemode laser source tunable in wavelength with a self-aligned external cavity
US5802085A (en) * 1994-09-13 1998-09-01 Photonetics S.A. Singlemode laser source tunable in wavelength with a self-aligned external cavity
EP0917261A1 (en) * 1994-09-13 1999-05-19 Photonetics Wavelength tunable monomode laser source with self-aligning external cavity
EP1006628A1 (en) * 1998-12-04 2000-06-07 Photonetics Multi-wavelength source
FR2786937A1 (en) * 1998-12-04 2000-06-09 Photonetics MULTI-WAVELENGTH SOURCE
JP2000174368A (en) * 1998-12-04 2000-06-23 Photonetics Sa Multiple wavelength laser source
JP4521793B2 (en) * 1998-12-04 2010-08-11 イェニスタ オプティクス Multiple wavelength laser source
EP1139523A2 (en) * 2000-03-30 2001-10-04 Ando Electric Co., Ltd. Light source for an external cavity laser
EP1139523A3 (en) * 2000-03-30 2003-02-26 Ando Electric Co., Ltd. Light source for an external cavity laser

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