JPS6411207A - Optical demultiplexer - Google Patents
Optical demultiplexerInfo
- Publication number
- JPS6411207A JPS6411207A JP16760187A JP16760187A JPS6411207A JP S6411207 A JPS6411207 A JP S6411207A JP 16760187 A JP16760187 A JP 16760187A JP 16760187 A JP16760187 A JP 16760187A JP S6411207 A JPS6411207 A JP S6411207A
- Authority
- JP
- Japan
- Prior art keywords
- demultiplexing
- range
- light
- wavelength light
- diffraction grating
- 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
Landscapes
- Optical Integrated Circuits (AREA)
Abstract
PURPOSE:To obtain a high-reliability optical demultiplexer which has the large degree of freedom of formation and a wide demultiplexing range by setting the grating constant of a transmission type diffraction grating so that only the shortest-wavelength light in light to be split is diffracted. CONSTITUTION:For example, when (n) kinds of wavelengths lambda1, lambda2,..., lambdan (where lambda1<lambda2<...<lambdan) are demultiplexed, (n-1) transmission type diffraction gratings 2a, 2b,..., 2n are arranged in order along a transmission to diffract and separate shorter-wavelength light in order and transmit the rest longer-wavelength light. Therefore, even if the pitch of the diffraction grating varies and the diffraction constant K varies, the demultiplexing range is windened by making incident to a Bragg angle (theta1 theta2) matching the incident angle with the diffraction grating K, and crosstalk is nearly eliminated. Consequently, the high-performance demultiplexer which has a wide demultiplexing range and corresponds to multiwavelength light is obtained under the condition that the degree of freedom of formation is large and the diffraction gratings are easily formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16760187A JPS6411207A (en) | 1987-07-03 | 1987-07-03 | Optical demultiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16760187A JPS6411207A (en) | 1987-07-03 | 1987-07-03 | Optical demultiplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6411207A true JPS6411207A (en) | 1989-01-13 |
Family
ID=15852793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16760187A Pending JPS6411207A (en) | 1987-07-03 | 1987-07-03 | Optical demultiplexer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6411207A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0496348A2 (en) * | 1991-01-22 | 1992-07-29 | Canon Kabushiki Kaisha | Multi-wavelength light detecting apparatuses having serially arranged grating directional couplers |
| JP2017161765A (en) * | 2016-03-10 | 2017-09-14 | 富士通株式会社 | Optical element and light generating device |
-
1987
- 1987-07-03 JP JP16760187A patent/JPS6411207A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0496348A2 (en) * | 1991-01-22 | 1992-07-29 | Canon Kabushiki Kaisha | Multi-wavelength light detecting apparatuses having serially arranged grating directional couplers |
| JP2017161765A (en) * | 2016-03-10 | 2017-09-14 | 富士通株式会社 | Optical element and light generating device |
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