JPS56150706A - Multiple optical branching filter - Google Patents

Multiple optical branching filter

Info

Publication number
JPS56150706A
JPS56150706A JP5299680A JP5299680A JPS56150706A JP S56150706 A JPS56150706 A JP S56150706A JP 5299680 A JP5299680 A JP 5299680A JP 5299680 A JP5299680 A JP 5299680A JP S56150706 A JPS56150706 A JP S56150706A
Authority
JP
Japan
Prior art keywords
channels
branching
filters
branching filter
branching filters
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
JP5299680A
Other languages
Japanese (ja)
Inventor
Akira Sugimura
Shigeru Saito
Yoshihisa Yamamoto
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP5299680A priority Critical patent/JPS56150706A/en
Publication of JPS56150706A publication Critical patent/JPS56150706A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/03WDM arrangements
    • H04J14/0307Multiplexers; Demultiplexers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To allow all channels to receive equal insertion losses by constituting optical branching filters of 2 channels stepwise in the form of 2<j>, and forming the pass bands of the respective branching filters into a comb-tooth shape. CONSTITUTION:Optical branching filters of 2 channels are shown by being enclosed with frames and the input light signal shown by the arrow of a solid line is assumed to be wavelength-multiplexed to n-tuple waves. The minimum natural number (k) satisfying n<k>>n is defined as (j), and the respective channels of the wavelength multiplexing are shown by giving numbers from the shorter of wavelengths. First, the input light signal is entered to a branching filter T. However, the branching filter T is so adjusted as to branch the signal to 1 of the 1st digit of the channels numbered by a binary notation and to 0. The beams of light divided to the optical paths 1 and 0 by the branching filter T enter respective branching filters 1 and 0, and further they are branched to 4 kinds of light of branching filters 11, 01, 10, 00 in the 3rd step.
JP5299680A 1980-04-23 1980-04-23 Multiple optical branching filter Pending JPS56150706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5299680A JPS56150706A (en) 1980-04-23 1980-04-23 Multiple optical branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5299680A JPS56150706A (en) 1980-04-23 1980-04-23 Multiple optical branching filter

Publications (1)

Publication Number Publication Date
JPS56150706A true JPS56150706A (en) 1981-11-21

Family

ID=12930529

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5299680A Pending JPS56150706A (en) 1980-04-23 1980-04-23 Multiple optical branching filter

Country Status (1)

Country Link
JP (1) JPS56150706A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60192431A (en) * 1984-03-14 1985-09-30 Nec Corp Optical line extension method
JPS6347623A (en) * 1986-08-15 1988-02-29 Nec Corp Wavelength multiplying and dividing element
EP0410096A2 (en) * 1989-07-25 1991-01-30 International Business Machines Corporation A wavelength division photonic switch
US6297895B1 (en) 1997-01-17 2001-10-02 Nec Corporation Wavelength division multiplexing system, wavelength division multiplexing transmission system and optical path cross connection system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS515314A (en) * 1974-07-03 1976-01-17 Nippon Steel Corp
JPS5350754A (en) * 1976-10-18 1978-05-09 Nec Corp Multiplexed light separating circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS515314A (en) * 1974-07-03 1976-01-17 Nippon Steel Corp
JPS5350754A (en) * 1976-10-18 1978-05-09 Nec Corp Multiplexed light separating circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60192431A (en) * 1984-03-14 1985-09-30 Nec Corp Optical line extension method
JPS6347623A (en) * 1986-08-15 1988-02-29 Nec Corp Wavelength multiplying and dividing element
EP0410096A2 (en) * 1989-07-25 1991-01-30 International Business Machines Corporation A wavelength division photonic switch
US6297895B1 (en) 1997-01-17 2001-10-02 Nec Corporation Wavelength division multiplexing system, wavelength division multiplexing transmission system and optical path cross connection system

Similar Documents

Publication Publication Date Title
US4441181A (en) Optical wavelength-division multiplex system
US5737106A (en) Wavelength selective optical delay line
JPS54103055A (en) Spectrometer
WO1988007313A3 (en) Improvements in electro optical switch architectures
EP0390416A3 (en) Optical multiplexer/demultiplexer using focusing bragg reflectors
JPS5525045A (en) Light wavelength multiple branching system
FI106490B (en) Wavelength demultiplexer and demultiplexer
JPS56150706A (en) Multiple optical branching filter
JPS5290957A (en) Branching filter for optical fibers
JPS5516584A (en) Wavelength-division photo switching system
JPS56155901A (en) Optical wave coupling and branching filter
SE503514C2 (en) Device and method for coupling one or more wavelength channels to and from an optical fiber
TWI719870B (en) Wave division multiplexing device for large-capacity optical transmission
JPS5389750A (en) Photo branching coupler
JPS56110908A (en) Wave combination and distribution method of optical signal for optical multiplex communication
JPS5723906A (en) Broad-band optical branching filter
JPS5535366A (en) Photo switch
JPS56126806A (en) Diffraction grating type light branching filter
JPS576806A (en) Optical branching filter
CN1402447A (en) Refraction and diffraction hybrid wavelength devision multiplexing method and structure
JPS5520044A (en) Wavelength divided light repeating exchange system
JPS5574504A (en) Single-mode optical fiber period branching filter
JPS5714809A (en) Optical fiber bundle
JPS57211104A (en) Directional coupler type optical demultiplexer having periodic structure
CN2588391Y (en) Refracting and diffracting mixed wave division multiplexer structure