JPS57190908A - Optical filter - Google Patents

Optical filter

Info

Publication number
JPS57190908A
JPS57190908A JP7483781A JP7483781A JPS57190908A JP S57190908 A JPS57190908 A JP S57190908A JP 7483781 A JP7483781 A JP 7483781A JP 7483781 A JP7483781 A JP 7483781A JP S57190908 A JPS57190908 A JP S57190908A
Authority
JP
Japan
Prior art keywords
wavelength
phase gratings
filter
optical filter
band
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.)
Granted
Application number
JP7483781A
Other languages
Japanese (ja)
Other versions
JPS6126042B2 (en
Inventor
Taro Shibagaki
Takeshi Koseki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7483781A priority Critical patent/JPS57190908A/en
Publication of JPS57190908A publication Critical patent/JPS57190908A/en
Publication of JPS6126042B2 publication Critical patent/JPS6126042B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/289—Rugate filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Filters (AREA)

Abstract

PURPOSE:To obtain a narrow-band optical filter having the desired characteristics, by inserting an optical waveguide path having no selecting function of the wavelength among plural phase gratings. CONSTITUTION:An optical filter is produced by inserting an optical waveguide path 42 having no selecting function of the wavelength between the phase gratings 41 and 43 in which each Bragg wavelength is shifted toward the long and short wavelength sides respectively. The filter transmission characteristics of both phase gratings are defined as shown by the solid and dotted lines in figure (b). Thus the transmission characteristics is obtained as shown in figure (c). As a result, a narrow-band filter is obtained to a desired wavelength lambda0. Other phase gratings having different characteristics are connected in series to increase the rejection band centering on the wavelength lambda0.
JP7483781A 1981-05-20 1981-05-20 Optical filter Granted JPS57190908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7483781A JPS57190908A (en) 1981-05-20 1981-05-20 Optical filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7483781A JPS57190908A (en) 1981-05-20 1981-05-20 Optical filter

Publications (2)

Publication Number Publication Date
JPS57190908A true JPS57190908A (en) 1982-11-24
JPS6126042B2 JPS6126042B2 (en) 1986-06-18

Family

ID=13558844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7483781A Granted JPS57190908A (en) 1981-05-20 1981-05-20 Optical filter

Country Status (1)

Country Link
JP (1) JPS57190908A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03174503A (en) * 1989-12-04 1991-07-29 Canon Inc Optical wavelength filter and device using the same
EP0629885A1 (en) * 1993-06-17 1994-12-21 AT&T Corp. Optical waveguiding component comprising a band-pass filter
JP2019035853A (en) * 2017-08-15 2019-03-07 沖電気工業株式会社 Wavelength filter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03174503A (en) * 1989-12-04 1991-07-29 Canon Inc Optical wavelength filter and device using the same
EP0629885A1 (en) * 1993-06-17 1994-12-21 AT&T Corp. Optical waveguiding component comprising a band-pass filter
JP2019035853A (en) * 2017-08-15 2019-03-07 沖電気工業株式会社 Wavelength filter

Also Published As

Publication number Publication date
JPS6126042B2 (en) 1986-06-18

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