JPS5690641A - Optical communication system - Google Patents
Optical communication systemInfo
- Publication number
- JPS5690641A JPS5690641A JP16725879A JP16725879A JPS5690641A JP S5690641 A JPS5690641 A JP S5690641A JP 16725879 A JP16725879 A JP 16725879A JP 16725879 A JP16725879 A JP 16725879A JP S5690641 A JPS5690641 A JP S5690641A
- Authority
- JP
- Japan
- Prior art keywords
- wavelength
- curvature
- semiconductor laser
- lights
- lambdam
- 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
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/2931—Diffractive element operating in reflection
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To minimize signal distortion on an optical fiber transmission line and to enable multiplexing by wavelength discrimination, by fixing oscillation wavelengths of semiconductor lasers. CONSTITUTION:When semiconductor laser spot light sources of wavelength lambdao are placed in center O of curvature of spherical mirror 5 having radius R of curvature and at one random point D, stigmatic hollow lattice 5 having an uneven-interval groove of a vertical straight line connecting O and D is formed. Then, the wavelength of one semiconductor laser to be fixed is denoted as lambdam and lattice constant (d) and incident angle thetam are selected satisfying 2lambdam=2dsinthetam, so that secondary diffracted light of wavelength lambdam may return to the incident point. Therefore, when many semiconductor lasers are arranged near point H, primary diffracted lights of respective oscillation lights all focus on center O of curvature and all semiconductor laser oscillation lights and can be sent via the same optical fiber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16725879A JPS5690641A (en) | 1979-12-23 | 1979-12-23 | Optical communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16725879A JPS5690641A (en) | 1979-12-23 | 1979-12-23 | Optical communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5690641A true JPS5690641A (en) | 1981-07-22 |
Family
ID=15846392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16725879A Pending JPS5690641A (en) | 1979-12-23 | 1979-12-23 | Optical communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5690641A (en) |
-
1979
- 1979-12-23 JP JP16725879A patent/JPS5690641A/en active Pending
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