JPS561013A - Filter of controllable transmission characteristic - Google Patents

Filter of controllable transmission characteristic

Info

Publication number
JPS561013A
JPS561013A JP7661979A JP7661979A JPS561013A JP S561013 A JPS561013 A JP S561013A JP 7661979 A JP7661979 A JP 7661979A JP 7661979 A JP7661979 A JP 7661979A JP S561013 A JPS561013 A JP S561013A
Authority
JP
Japan
Prior art keywords
filter
waveguide
transmission characteristics
electrodes
external voltage
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
JP7661979A
Other languages
Japanese (ja)
Inventor
Hisaharu Yanagawa
Mikio Kokayu
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.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
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 Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP7661979A priority Critical patent/JPS561013A/en
Publication of JPS561013A publication Critical patent/JPS561013A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Integrated Circuits (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

PURPOSE:To make possible the controlling of transmission characteristics by applying external voltage to the waveguide and changing the refractive index difference of the core layer and clad layer of the waveguide by electro-optic effect and free carrier depletion effect or the like to change the shield wavelength of the waveguide thereby controlling the transmission characteristics. CONSTITUTION:Schottky contact is formed on e.g. GaAs and the filter is formed by electrodes 1, 2 such as metal electrodes of Au of less absorption losses or ohmic electrodes by Au-Ge-Ni, a core layer 3 by N-type GaAs and a clad layer 4 by N-type GaAs. When external voltage V is applied between the electrodes 1 and 2, the refractive index (n) of the core layer 3 of the waveguide is changed by free carrier depletion effect. As a result of this, shield wavelength changes and the transmission characteristics of the filter changes. Hence, the transmission characteristics of the filter may be controlled by the external voltage V.
JP7661979A 1979-06-18 1979-06-18 Filter of controllable transmission characteristic Pending JPS561013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7661979A JPS561013A (en) 1979-06-18 1979-06-18 Filter of controllable transmission characteristic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7661979A JPS561013A (en) 1979-06-18 1979-06-18 Filter of controllable transmission characteristic

Publications (1)

Publication Number Publication Date
JPS561013A true JPS561013A (en) 1981-01-08

Family

ID=13610356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7661979A Pending JPS561013A (en) 1979-06-18 1979-06-18 Filter of controllable transmission characteristic

Country Status (1)

Country Link
JP (1) JPS561013A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852250A (en) * 1971-10-28 1973-07-23
JPS5030433A (en) * 1973-07-19 1975-03-26

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852250A (en) * 1971-10-28 1973-07-23
JPS5030433A (en) * 1973-07-19 1975-03-26

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